April 18, 2018 PARTIES INTERESTED IN FOR COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE (UHPC) PANEL SYSTEMS

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1 April 18, 2018 TO: PARTIES INTERESTED IN FOR COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE (UHPC) PANEL SYSTEMS SUBJECT: Proposed Acceptance Criteria for Composite, Ultra-high Performance Concrete (UHPC) Panel Systems, Subject (ME/YM) Dear Colleague: Hearing Information: Tuesday, June 5, :00 am Hilton Los Angeles Airport 5711 West Century Boulevard Los Angeles, CA (310) You are invited to comment on Proposed Acceptance Criteria for Composite, Ultra-high Performance Concrete (UHPC) Panel Systems (AC493), which will be discussed at the Evaluation Committee hearing noted above. The proponent of this criteria is TAKTL, LLC. The panels under this criteria are factory-fabricated, composite UHPC panels that are mechanically attached to the wall framing or sub-frame assembly with post-installed connectors that are either undercut anchors (i.e., concealed anchors) or with mechanical fasteners through the face of the panel (i.e., visible fastening). The panels are used as nonload bearing interior and exterior wall cladding. This criteria intends to address strength characteristics of component materials and panels (including accessory elements if applicable); durability characteristics of component materials and manufactured panels, and performance of panel connectors (anchors and visible fasteners) in accordance with the 2018 and 2015 International Building Code (IBC). Evaluation of panel connectors for use in Seismic Design Categories C through F is outside the scope of this criteria. ICC-ES staff would like to state that some of the testing required by this criteria is adopted from existing AC458; however, the major difference between AC493 and AC458 is that the panel evaluated under this criteria is a composite panel consisting a proprietary UHPC material mix and alkali-resistant glass fiber mesh. Also, AC493 is only intended to establish

2 2 strength and durability characteristics of composite UHPC material and connectors (anchors or fasteners). You are invited to submit written comments on this or any other agenda item, or to attend the Evaluation Committee hearing and present your views in person. If you wish to contribute to the discussion, please note the following: 1. Regarding written comments and presentations: a. You should submit these via to or by U.S. mail to the Western Regional (Brea) office to be received by the applicable due date. b. Comments are to be received by May 9, These written comments will be forwarded to the committee before the meeting, and will also be posted on the ICC-ES web site shortly after the deadline for submission. Written comments that are not submitted by this deadline will not be considered at the meeting. c. Rebuttal comments, from the proponent noted in this letter, are to be received by May 18, They will be forwarded to the committee before the meeting, and will also be posted on the ICC-ES web site shortly after the deadline for submission. Written rebuttal comments that are not submitted by the deadline will not be considered at the meeting. d. Visual presentations, in PowerPoint format only, are to be received by May 30, These will be forwarded to the committee before the meeting, and will also be posted on the ICC-ES web site shortly after the deadline for submission. Presentations that are not submitted by the deadline cannot be viewed at the meeting. Note: Videos will not be posted on the web site. Presentations will be retained with other records of the meeting. It is the presenter s responsibility, prior to the presentation, to verify with ICC-ES staff that the presentation files have been transferred satisfactorily to the presentation computer. e. ICC-ES will post to the web site, on June 1, 2018, memos by the ICC-ES staff, responding to the previously received public comments. f. If you miss the deadlines for submission of written comments and visual presentations, your verbal comments can be presented at the meeting. g. Proposed criteria, written public comments, visual presentations, and responses by ICC-ES staff will be available at the meeting on a limited number of CDs for uploading to computers. ICC-ES will not provide any printed copies. 2. Regarding verbal comments and presentations:

3 3 Please plan to speak for not more than ten minutes. As noted above, visuals must be in PowerPoint format. We have a computer, projector, and screen available to those making visual presentations. It is the presenter s responsibility, prior to their presentation, to verify with ICC-ES staff that presentation files have been satisfactorily transferred to the presentation computer. 3. Keep in mind that all materials submitted for committee consideration are part of the public record and will not be treated as confidential. It is the presenter s responsibility to certify to ICC-ES staff that no materials infringe copyright. 4. Please do not communicate with committee members before the meeting about any items on the agenda. We appreciate your interest in the work of the Evaluation Committee. If you have any questions, please contact me at (800) , extension 3253, or Yamil Moya, P.E., at extension You may also reach us by at es@icc-es.org. Yours very truly, ME/raf Encl. cc: Evaluation Committee Mahmut Ekenel, Ph.D., P.E. Senior Staff Engineer

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7 (800) (562) A Subsidiary of the International Code Council PROPOSED ACCEPTANCE CRITERIA FOR COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE (UHPC) PANEL SYSTEMS AC493 Proposed April 2018 PREFACE Evaluation reports issued by ICC Evaluation Service, LLC (ICC-ES), are based upon performance features of the International family of codes. (Some reports may also reference older code families such as the BOCA National Codes, the Standard Codes, and the Uniform Codes.) Section of the International Building Code reads as follows: The provisions of this code are not intended to prevent the installation of any materials or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved. An alternative material, design or method of construction shall be approved where the building official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, at least the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, durability and safety. ICC-ES may consider alternate criteria for report approval, provided the report applicant submits data demonstrating that the alternate criteria are at least equivalent to the criteria set forth in this document, and otherwise demonstrate compliance with the performance features of the codes. ICC-ES retains the right to refuse to issue or renew any evaluation report, if the applicable product, material, or method of construction is such that either unusual care with its installation or use must be exercised for satisfactory performance, or if malfunctioning is apt to cause injury or unreasonable damage. Acceptance criteria are developed for use solely by ICC-ES for purposes of issuing ICC-ES evaluation reports Copyright 2018 ICC Evaluation Service, LLC. All rights reserved.

8 Page 2 April 2018 PROPOSED ACCEPTANCE CRITERIA FOR COMPOSITE ULTRA-HIGH PERFORMANCE CONCRETE (UHPC) PANEL SYSTEMS INTRODUCTION 1.1 Purpose: The purpose of this acceptance criteria is to establish requirements for composite, ultra-high performance concrete (UHPC) panel systems, used to form exterior or interior thin wall panel systems used as cladding, to be recognized in ICC Evaluation Service, LLC (ICC-ES), evaluation reports under the 2018, and 2015 International Building Code. The basis of recognition is IBC Section The reason for the development of this acceptance criteria is to provide guidelines for the evaluation of UHPC used to form thin wall panel systems used as cladding, since the IBC does not specify requirements for the testing and use of such panel systems. 1.2 Scope: The panels under this criteria are factory-fabricated, composite UHPC panels that are mechanically attached to the wall framing or sub-frame assembly with postinstalled connectors that are either undercut anchors (i.e., concealed anchors) or with mechanical fasteners through the face of the panel (i.e., visible fastening). The panels are used as non-load bearing interior and exterior wall cladding. Use of conventional steel reinforcement (rebar) in panels is not applicable to this criteria. This criteria is applicable to the composite UHPC panel systems defined in Section 1.4.4, and intended to address strength characteristics of component materials and panels (including accessory elements if applicable); durability characteristics of component materials and manufacturered panels, and performance of panel connectors (anchors and visible fasteners) in accordance with 2018 and 2015 IBC. Evaluation of panel connectors for use in Seismic Design Categories C through F is outside the scope of this criteria.

9 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page Codes and Referenced Standards: and 2015, International Building Code (IBC), International Code Council ASTM C31-15 (2018 IBC), -12(2015 IBC), Standard Practice for Making and Curing Concrete Test Specimens in the Field, ASTM International ASTM C109/C109M-16a, Standard Test Method for Compressive Strength of Hydraulic Cement Mortars, ASTM International ASTM C496-11, Standard Test Method for Splitting Tensile Strength of Cylindrical Concrete Specimens, ASTM International ASTM C518-10, Standard Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus, ASTM International ASTM C (2012), Standard Test Method for Linear Shrinkage and Coefficient of Thermal Expansion of Chemical-Resistant Mortars, Grouts, Monolithic Surfacing, and Polymer Concretes, ASTM International ASTM C642 13, Standard Test Method for Density, Absorption, and Voids in Hardened Concrete, ASTM International ASTM C (2008), Standard Test Method for Resistance of Concrete to Rapid Freezing and Thawing, ASTM International ASTM C a, Standard Specification for Fiber-Reinforced Concrete, ASTM International.

10 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page ASTM C (2016), Standard Test Methods for Sampling and Testing Non-Asbestos Fiber-Cement Flat Sheet, Roofing and Siding Shingles, and Clapboards, ASTM International ASTM C , Standard Test Method for Potential Alkali Reactivity of Aggregates (Mortar-Bar Method), ASTM International ASTM C1666/C1666M-08 (2005): Standard Specification for Alkali Resistant (AR) Glass Fiber for GFRC and Fiber- Reinforced Concrete and Cement, ASTM International ASTM D (2017), Standard Test Method for Breaking Strength and Elongation of Textile Fabrics (Grab Test), ASTM International ASTM E84, Standard Test Method for Surface Burning Characteristics of Building Materials, ASTM International ASTM E (2018 IBC), -12a (2015 IBC), Standard Test Method for Fire Tests of Building Construction and Materials, ASTM International ASTM E (2018 IBC) -12 (2012 IBC), Standard Test Method for Behavior of Materials in a Vertical Tube Furnace at 750 C, ASTM International ASTM E (2018 IBC) -02 (2012 IBC), Standard Test Method for Structural Performance of Exterior Windows, Doors, Skylights and Curtain Walls by Uniform Static Air Pressure Difference, ASTM International ASTM E488-15, Standard Test Method for Strength of Anchors in Concrete Elements, ASTM International.

11 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page AISI S905-13, Test Methods for Mechanically Fastened Cold-Formed Steel Connections, American Iron and Steel Institute AASHTO T (2013), Standard Method of Test for Tensile Strength of Hydraulic Cement Mortars, American Association of State Highway and Transportation Officials FHWA-HRT , Material Property Characterization of Ultra-High Performance Concrete, Federal Highway Administration, U.S. Department of Transportation NFPA , Standard Fire Test Method for Evaluation of Fire Propagation Characteristics of Exterior Non-Load-Bearing Wall Assemblies Containing Combustible Components, National Fire Protection Agency UL , Standard for Fire Tests of Building Construction and Materials, Underwriters Laboratories Inc ICC-ES AC193, Mechanical Anchors in Concrete Elements, ICC Evaluation Service ACI Building Code Requirements for Structural Concrete, American Concrete Institute ACI , Qualification of Post-Installed Mechanical Anchors in Concrete and commentary, American Concrete Institute. 1.4 Definitions: First Peak Strength: In this criteria, First peak strength is a Composite UHPC panel property. In flexural tests, the First Peak Strength is defined as the tensile stress

12 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page corresponding to the highest load (or the First Peak Load before the first crack is formed). See Figure 1 for an illustration. Testing is described in Section Postcracking Peak Strength: In this criteria, Postcracking peak strength is a Composite UHPC panel property. For composite UHPC panels, in flexural tests, after cracking or the First Peak Load, the slight decrease in load and then a load increase to a level above the First Peak Load is called Postcracking peak strength. The Postcracking Peak Strength is defined as the tensile stress corresponding to the highest load reached after the First Peak Load, tested with actual panel sample from the standard manufacturing process. See Figure 1 for an illustration. Testing is described in Section UHPC Material: In this criteria, UHPC material is defined as Ultra-High Performance Concrete. It is a cementitious composite material composed of cement, fine aggregate, superplasticizer, accelerator, synthetic fibers and other admixtures Composite UHPC Panel: A composite UHPC panel is a panel formed by UHPC, and one or two layers of embedded continuous alkali-resistant glass mesh reinforcement. Panels can have a base thickness range of ½ in. to 1-in. (12.7 mm to 25.4 mm), and panel nominal dimensions may come in various widths and lengths. Panels are either smooth faced or manufactured with optional raised surface textures or patterns of an overall average thickness, calculated by volume, not to exceed 1.5 times the base thickness. Base thickness is defined as the panel thickness (not less than ½ in. (12.7mm)) except of the surface textures and patterns Composite UHPC Panel System: A Composite UHPC panel system consists of composite UHPC panel(s), and the concealed anchors (undercut) or visible

13 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page fasteners (screws) that fasten the panels to the substrate material. Base support material and base support material grade used in qualification testing shall also be defined. 2.0 BASIC INFORMATION 2.1 General: The following general product information regarding the composite UHPC panel systems shall be submitted: Product Description of the Composite UHPC Panel Component Materials: A general description of UHPC mix proportions including fiber type, fiber length/denier and fiber dosage, and glass mesh type, grade, size and spacing shall be submitted Product Description of the Composite UHPC Panel Systems: (a) description of the production method, including mixing procedure and curing/treatment condition/procedure; (b) panel sizes, base and overall thicknesses, and dimensional tolerances; and (c) assembly descriptions, including anchor type and specification, minimum and maximum spacing, connector installation, and panel installation Installation Instructions: Installation instructions for the interior or exterior composite UHPC panels shall include requirements and limitations regarding installation of the panels, a description of the field preparation, and installation of the anchors. The manufacturer s published installation instructions (MPII) for complete panel installation shall be submitted Packaging and Identification: The method of packaging the interior or exterior composite UHPC panels including anchors and fasteners (if applicable) shall be specified. The labels on panels and accessory elements shall be required to bear the evaluation

14 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page report holder s company name, the product designation, lot numbers, and the evaluation report number. 2.2 Testing Laboratories: Testing laboratories shall comply with Section 2.0 of the ICC-ES Acceptance Criteria for Test Reports (AC85) and Section 4.2 of the ICC-ES Rules of Procedure for Evaluation Reports. 2.3 Test Reports: Test reports shall comply with AC85 and describe the process used to assemble and prepare the test specimens. In addition, the test reports shall include the following information: Verification that test specimen sampling complies with Section 2.4; Mode of failure for each load test; Photographs of test equipment and typical failures; Report prepared by a registered design professional. 2.4 Sampling: Product constituents and panels Panel constituents such as UHPC mix, mesh and other elements (anchors, fasteners) (if applicable) shall be sampled in accordance with Section 3.1 and 3.4 of AC85. Construction of panel systems shall comply with Section 3.3 and Section 3.4 of AC85, as applicable. 2.5 Qualification Test Plan: A qualification test plan shall be submitted to and approved by ICC-ES staff prior to any testing being conducted. 3.0 TEST AND PERFORMANCE REQUIREMENTS 3.1 Material Tests: Tests shall be conducted in accordance with Sections through of this criteria with the conditions of acceptance outlined in each section. Testing shall be conducted on specimens for each combination of concrete mix proportions (including

15 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page fiber type, fiber dosage, fiber length/denier, and fiber slenderness ratio), glass mesh material type, material grade, size and spacing. 3.2 Composite UHPC Panel Strength and Durability Tests: UHPC panel strength and durability tests shall be conducted in accordance with Section 4.2 of this criteria with the conditions of acceptance outlined in each section. Testing shall be conducted on specimens for each combination of concrete mix proportions; glass mesh material type, material grade, size and spacing, mesh location, number of layers; placement method; curing/treatment method; panel base thickness; which is sought for recognition. Panel testing provides panel parameters that can be used for structural design of wall assemblies constructed with composite UHPC panels. 3.3 Composite UHPC Panel Connection Tests: Panel connection test shall be in accordance with Section 4.3 of this criteria with the conditions of acceptance outlined in each section. Specimens for each combination of concrete mix proportions; glass mesh material type, material grade, size and spacing, mesh location, number of layers; placement method; curing/treatment method; panel base thickness; connector type, grade, size, minimum spacing, minimum edge distance, minimum embedment depth; which are sought for recognition. Connection testing provides connector resistance to lateral shear and out-of-plane tension loads. 3.4 Exterior Wall Assembly Fire propagation Testing (Optional): For recognition under 2018 and 2015 IBC, vertical and lateral flame propagation testing shall be conducted in accordance with NFPA 285 as required by IBC Section (2018) or Section (2015) for installation on exterior walls on buildings of Types I, II, III or IV construction that are greater

16 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page than 40 feet in height above grade plane and that include a combustible water-resistive barrier. The tested assembly or assemblies must be representative of the panel systems and exterior wall assemblies to be recognized in the evaluation report. Alternative water-resistive barriers can be considered provided specific details and test procedures to be utilized to justify the alternative water resistive barrier are submitted to ICC-ES for review prior to the commencement of testing. Unless the product is qualified by testing, the scope of the evaluation report will be limited under 2018 and 2015 IBC to use in exterior walls of buildings of Type V construction and exterior walls not exceeding 40 feet above grade of buildings of Types I, II, III and IV construction, provided compliance with Section 3.5 of this criteria is established. 3.5 Noncombustibility (Optional): Noncombustibility testing shall be conducted on the UHPC elementary material (without glass mesh) in accordance with ASTM E136 (mix/prism test) when recognition is sought for installation on exterior walls in buildings of Type I, II, III and IV construction in accordance with IBC Section and composite UHPC panel material shall be tested in accordance with IBC Section Each representative UHPC concrete mix proportions (including fiber type, fiber dosage, fiber length/denier, and fiber slenderness ratio) shall be tested and evaluated for compliance with ASTM E136. Each representative UHPC composite panel as described in Section 4.2 shall be tested in accordance with ASTM E Interior Non-Load Bearing Wall finish (Optional): For recognition for interior use as a wall finish, panels with minimum concrete thickness over the mesh reinforcement shall be tested per ASTM E84, and are required to meet Class A rating. Installation of composite UHPC panels shall be installed in accordance with 2018 IBC Section and and 2015 IBC

17 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page Section and The support system and composite UHPC panel connections shall be determined by a registered design professional to confirm the support is adequate for the panel load. 3.7 Weather Resistive Consideration: A water-resistive barrier complying with Section of the 2018 IBC and Section of the 2015 IBC is required. 3.8 Fire-Resistance-Rating (Optional): For recognition of composite UHPC panel system use as an integral component of a fire rated assembly, fire-resistance-rating testing shall be conducted in accordance with ASTM E119 or UL 263 and IBC Section 703. Unless the product is qualified by fire-resistance testing, the scope of the evaluation report will be limited to use in non-fire-resistance-rated construction. As an alternate to fire testing, a fire analysis may be submitted demonstrating that the composite UHPC panel system may be added to fireresistance-rated assembly(s) recognized in IBC Section 721. The analysis shall consider the provisions in IBC Section Thermal Resistance (Optional): Thermal resistance testing of the composite UHPC Panels shall be conducted in accordance with ASTM C518, on 1 inch (25.4mm) thick panel samples to establish an R-value per inch for composite UHPC panel to be reported in the evaluation report. 4.0 TEST METHODS 4.1 Material Testing: Test specimens include all component materials of UHPC as described in Section (which excludes glass mesh reinforcement), and testing shall be conducted in accordance with Sections through on specimens for each combination of concrete mix proportions, fiber type, fiber length/denier and fiber dosage, fiber slenderness

18 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page ratio, placement method, curing/treatment method, for which recognition is sought. Characterization of glass mesh reinforcement shall be in accordance with Section of this criteria for each combination of glass grade, size and mesh spacing Compressive Strength of UHPC Material: Specimens: A minimum of five (5) replicate specimens from standard mix design per requirements outlined in Section 4.1 shall be tested. Specimens in 2-inch (51mm) cubes for strength tests shall be stored and cured in accordance with ASTM C Procedures: Testing shall be in accordance ASTM C Condition for Acceptance: The average 28-day compressive strength shall be reported in the ICC-ES evaluation report and used for quality control purposes. The test results shall have a Coefficient of Variation (COV) equal or less than 10 percent Splitting Tensile Strength test of UHPC Material: Specimens: A minimum of five (5) replicate specimens shall be tested. Samples shall be 3-in. (76.2 mm) in diameter cylinders with 1.5-in. (38.1 mm) thickness (2:1 ratio) from standard mix design per requirements outlined in Section Procedures: Splitting Tensile Test shall be conducted in accordance with ASTM C Conditions of Acceptance: The average 28-day splitting tensile strength shall be reported in the ICC-ES evaluation report and used for quality

19 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page control purposes. The test results shall have a Coefficient of Variation (COV) less than or equal to 15 percent Water Absorption of UHPC Material: Specimens: A minimum of five (5) replicate prism specimens from standard mix design per requirements outlined in Section 4.1 shall be tested Procedures: Water absorption testing shall be conducted in accordance with ASTM C642 and the test shall be modified so that boiling temperatures is 90 o C ± 2 o C (194 o F ± 4 o F) Conditions of Acceptance: The average absorption after immersion and boiling shall be less than 8 percent Freeze Thaw Resistance of UHPC Material: Specimens: A minimum of three (3) replicate prism specimens from standard mix design per requirements outlined in Section 4.1. The prism specimen size shall be 1.5 inches by 1.5 inches by 6.25 inches (38mm x 38mm x 159mm) Procedures: Freeze-thaw resistance testing shall be conducted in accordance with ASTM C666, Procedure A with 600 cycles of freezing and thawing Conditions of Acceptance: The minimum Average Durability Factor in accordance with ASTM C666 Tables 1 and 2 shall be more than Linear Coefficient of Thermal Expansion of UHPC Material: Specimens: Minimum of three (3) specimens from standard mix design per requirements outlined in Section 4.1.

20 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page Procedures: Linear coefficient of thermal expansion testing shall be conducted in accordance with ASTM C531 with modifications in FHWA HRT Section 3.9 and AASHTO TP Conditions of Acceptance: The average linear coefficient shall be reported in the ICC-ES evaluation report and used for quality control purposes Alkali-silica reactivity of UHPC Material: Specimens: Minimum of six (6) replicate mortar bars shall be cast and tested for each curing condition Procedures: Alkali-silica reactivity of the fine aggregate testing shall be tested in accordance with ASTM C1260 and/or ASTM C Conditions of Acceptance: The result of the ASTM C1260 test shall indicate that 28-day expansion values of all specimens are less than 0.10 percent. If this criteria is not met, the result of six replicate mortar bars tested in accordance with ASTM C1567 using the same mixture as that of the ASTM C1260 specimens shall indicate that expansion of each test specimen is less than 0.10 percent after 28 days of exposure Fiber compatibility Used in UHPC Material: Fiber compatibility with concrete testing shall be conducted in accordance with the ICC-ES Acceptance Criteria for Concrete with Synthetic Fibers (AC32), Section 4.6, with the conditions of acceptance shown therein. Note: if Annex C of AC32 is preferred, the requirement of 3,000 psi concrete compressive strength can be modified provided that control specimens and aged-specimens comply with the following (1) have the replicate mixture-design; (2) the average 28-day

21 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page compressive strengths of both control and aged specimens are within 500 psi of each other; (3) the fiber type, length and percentage of fibers used in both control and aged specimens shall be representative of the UHPC test panels tested under Section 4.1 of this criteria Glass Mesh Material Specification: The glass reinforcing mesh shall comply with Sections and below Evidence of compliance shall be submitted showing that the alkali-resistant (AR) glass mesh specification and properties comply with ASTM C Test results shall be submitted for tension breaking and elongation determined in accordance with ASTM D5035 with modifications as given in this section. The tensile strength and the elongation of the reinforcement are to be measured in the weft and warp directions on 10 samples respectively. The samples should measure 50 mm by at least 300 mm. They shall contain at minimum 5 threads within the width. The clamps of the testing machine shall be covered with a suitable rubber surface and hold the whole width of the samples. They shall be sufficiently rigid to resist deformation during the test. The sample shall be located perpendicular to the clamp of the tensile testing machine. The free length of the sample between clamps should be 200 mm. The tensile force is increased with a constant crosshead speed of (100 ± 5) mm/min until failure occurs. Testing is done in the as-delivered state. The strength in N at failure and the elongation are recorded. Samples where the specimen is displaced within the clamps or where the failure occurs at the clamps shall be discarded. Calculation is undertaken to determine; the individual values of the tensile strength calculated from the force at failure in relation to the width of the sample:

22 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page 16 ββ = F W where: β = tensile strength, N/mm. F = breaking force, N. W = sample width, mm The individual values of elongation calculated from the change of the length at failure in relation to the length of the sample between the clamps: 309 where: εε = L L 310 εε = elongation at break, percent L = change length, cm. L = length of the sample between clamps, cm. Finally, the mean values of tensile strength and elongation calculated from these individual values. The condition of acceptance is that, when tested in the warp and weft orientation, the mean values of tensile strength and elongation of mesh calculated from these individual values shall not be less than 58 N/mm (331 lb/in), and maximum 4.8 percent for tensile breaking strength and elongation, respectively. 4.2 Composite UHPC Panel Strength and Durability Testing: Tests described in this section shall form the basis of determining engineering values. Test specimens include all component materials of composite UHPC Panel as described in Section including continuous glass fiber mesh reinforcement, and testing shall be conducted in accordance with this section on specimens for each combination of concrete mix proportions, fiber type, fiber

23 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page length/denier and fiber dosage, fiber slenderness ratio, per the concrete mix outlined in Section 4.1. Placement method, curing/treatment method, which is sought for recognition shall be from actual panel production methods. Panel specimens shall be tested with the same glass mesh characterized through tests in Section Flexural Strength (Modulus of Rupture, MoR) Composite UHPC Panel: Specimens: A minimum of eight (8) replicate specimens shall be selected (half in warp direction and half in weft direction) at the panel base thickness. Specimen size shall be 6 inches by 12 inches by the panel base thickness to be recognized (152 mm x 305 mm x panel thickness). Preparation of test specimens shall be as follows: cut a pair of specimens, each 6 in (152 mm) by 12 in (305 mm) by the thickness of the panel from the interior area of each sample sheet in such a manner that no edge of specimen is less than 3 in (76 mm) from the original edges of the sheet. The longer dimension of four of the specimens shall be parallel to the length of the sheet (warp direction) and the others shall be at right angles to it (weft direction). Additional tests may be required for materials having different configurations on the panel faces Conditioning: Equilibrium (dry) conditioning requires placement of the test specimens in a controlled atmosphere of 73 ± 4 F (23 ± 2 C) and 50 ± 5 % relative humidity and in such a manner that all faces are adequately ventilated for at least four days. Wet conditioning requires specimens to be immersed in water at a temperature of 73 ± 7 F (23 ± 4 C) for a period of minimum 48 hours. Specimens shall be tested immediately upon removal from the water.

24 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page Procedures: Flexural Strength testing shall be conducted in accordance with ASTM C1185, Section 5 for both wet and dry (equilibrium) specimens utilizing three-point loading with modifications as given in this section. The test span shall be 10 in. (254 mm) and the load line and support shall be parallel. Test procedure shall be as follows: mount a dial micrometer reader with 0.01 in. (0.25 mm) or an equally sensitive apparatus to bear on the loading member or on the specimen at mid-span to determine the deflection of the specimen. Measure and record the deflection when the first peak strength (P 1 ) is reached. Increase the load at a uniform deflection rate until post-peak strength (P p ) is achieved and it will result in failure of the specimen between five and thirty seconds. The error in the load reading shall not exceed one (1) percent of the maximum load. Measure the specimen base thickness, for the flexural test, at four points along the line of break for an average result. This measurement may be completed either before or after load testing using calibrated measuring equipment Calculation and Report: Calculate the flexural strength for each specimen by the following equation: where: RR = 3 PpL 2bdd 2 R = flexural strength, psi (MPa), Pp = post-peak maximum load, lb (N), L = length of span, in. (mm), b = width of specimen, in. (mm), and d = average panel base thickness, in. (mm).

25 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page The average flexural strength of the specimen shall be the arithmetic mean value obtained in the two directions (warp and weft directions). Arithmetic mean value shall be reported. The allowable flexural strength shall be determined by dividing the lowest of the average flexural strength from the warp and weft directions by safety factor of Conditions of Acceptance: The following acceptance conditions apply: 1) the test shall show a curve similar to what is shown in Figure 1 of this criteria. 2) Minimum acceptance ratio of individual test values of P p over P 1 shall be 1.5, and minimum acceptable ratio of average test values of P p over P 1 shall be 2. 3) Minimum acceptable ratio of individual test values of δ p over δ 1 shall be 20, and minimum acceptable ratio of average test values of δ p over δ 1 shall be 40. The coefficient of variation for the test sets shall not exceed 15 percent Water Tightness of Composite UHPC Panels: Specimens: Test specimens shall be obtained from at least three (3) manufactured panels with dimensions of minimum 24 in. by 20 in. (610 by 508 mm). One specimen from each sheet with a total of three specimens for each test shall be cut Procedures: Water tightness testing shall be conducted in accordance with ASTM C1185, Section 11, with following exceptions: keep the 24 by 20 in. (610 by 508 mm) test specimens in a controlled environment for at least five days at an ambient temperature [exceeding 41ºF (5ºC)]. Place and seal a suitable frame with dimensions of minimum 22 in. by 18 in. (559 by 457 mm) on top of the face of the specimen

26 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page and fill with water to a height of 2 in. (50 mm) above the face of the sheet. Place the specimen in a controlled environment at 73 ± 4ºF (23 ± 2ºC) and 50 ± 5% relative humidity for a period of 24 hours. Calculation and report the underside of the sheet. Report the thickness of the product tested Conditions of Acceptance: No traces of moisture on the underside of the UHPC composite panel shall be visible and there shall be no formation of drop of water on the underside Freeze-Thaw Resistance of Composite UHPC Panels: Specimens: Test specimens shall be cut from manufactured panels with dimensions of 6 in. by 12 in. (152mm x 305mm), from at least three sampled panel sheets. One specimen shall be cut from each sheet with a minimum of five (5) specimens for each test Procedures: Freeze-thaw resistance testing (resonant transverse frequency) shall be conducted in accordance with ASTM C666, Procedure B with 300 cycles of freezing and thawing. At the end of 300 cycles, modulus of rupture (MoR) testing in accordance with Section shall be conducted on freeze-thaw cycled specimens. Durability Factor for each specimen shall also be measured using resonant transverse frequency at the end of 300 cycles Conditions of Acceptance: The Durability Factor of all specimens in accordance with ASTM C666 shall be a minimum 90 percent for the panel samples. Average MoR of freeze-thaw conditioned specimens shall be at least 90 percent of the average MoR of dry-control specimens as determined in Section of this criteria.

27 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page Temperature Cycling of Composite UHPC Panels: Specimens: Five panels of minimum base panel thickness and minimum panel dimensions of 60 inches wide x 48 in. shall be prepared (1.5m x 1.2m) Procedures: Temperature cycling test shall be conducted in accordance with the following conditions with 25 consecutive temperature cycles. The panels shall be attached to the supports (framing) in a manner that is representative of the field conditions with a minimum of three attachment points per 60 in. panel width and a minimum of three rows of attachment points. Each cycle shall consist of the following five (5) steps: one hour of water exposure at room temperature, followed by six hours at minus 40 F (-40 C), followed by two hours at 70 F (21.1 C), followed by 14 hours at 180 F (82 C), and followed by one hour at 70 F (21.1 C). Between cycles, such as on weekends and holidays, the samples may be maintained at an ambient temperature of 70 F (21.1 C). A tolerance of ± 5 F (2.8 C) is allowed on the specified temperatures. Spray nozzles for the water exposure shall be located approximately 7 feet away from the test specimens and shall deliver 6 inches of water per hour at a water temperature of 40 F to 60 F (4.4 to 15.6 C). The test panel shall be installed vertically with actual anchors used for construction; minimum spacing and minimum edge distance shall be considered. The specified duration for each step within the cycle shall include a transition time between the previous step and the following step; however, total transition time between two adjacent steps shall not exceed 50 percent of the time specified for the current step Conditions of Acceptance: After exposure, there shall be no cracking, checking, crazing, erosion, or other characteristic which might affect performance

28 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page as an exterior wall cladding. Additionally, there shall be no sign of failure or distress at fastener locations. 4.3 Composite UHPC Panel Connection Tests: UHPC panel connection tests shall be performed on each configuration of composite UHPC panel described in Section Post Installed Undercut Anchors (Undercut Panel Anchors): The anchors shall be corrosion-resistant tested for conformance to the specified standards. The testing in this section is for the purpose of providing anchor design capacities to be reported in the evaluation report to be used in the connection design of the composite UHPC panels. UHPC material concrete strength determination shall follow Section 4.1 of this criteria. Anchors shall be tested for tension and shear capacity, tension reliability under repeated load, anchor performance with freeze-thaw and drill bit tolerance, and anchor capacity with edge and spacing influence, as shown in Table 1 of this criteria Specimens: Sample dimensions and the minimum number specimens per test type are given in Table 1. Panels shall be sampled for the same panel lots as those used for other required composite UHPC panel tests in Section Procedures: The post-installed undercut anchors supporting composite UHPC panels shall be tested in accordance with Table 1 of this document. Testing shall be unconfined tests conducted on composite UHPC panels. The concrete mix proportions and average compressive strength shall be the same as that for the UHPC material to be recognized in the evaluation report. Concrete compressive strength determination shall be in accordance with Section 4.1 of this criteria. Testing shall be

29 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page conducted for combinations of anchor size, spacing and panel thickness to be recognized, and as outlined in the test plan proposal Conditions of Acceptance: The average tension and shear strength results shall be recorded along with average standard deviation, and Coefficient of 457 Variation (COV). The results shall comply with the following conditions: (a) the characteristic values of the test results shall be based on the lesser of the concrete strength, steel strength or connection strength of the tests in Table 1, test series 1a and 1b, determined in accordance with ACI 355.2, Appendix A2. The strength reduction factor, ɸ, shall be in accordance with ACI 318, Section (Category 1, Condition B); (b) the average results from Tests 2, 3, and 4 in Table 1 shall not be less than ninety percent (90 percent) of the average values obtained from test series 1a and 1b in Table 1 of this criteria; (c) Minimum edge distance and minimum spacing obtained from tests 5a, 5b, 5c and 5d shall be reported as minimum edge and minimum spacing. Minimum edge is defined as closest distance to the panel edge that a single anchor can develop 100 percent of its capacity obtained from 1a and 1b of Table 1. Minimum spacing is defined as closest distance between group of anchors away from edges that all anchors can develop 100 percent of its capacity obtained from test series 1a and 1b of Table Visible Fasteners (mechanical fasteners through pre-drilled holes): Visible fasteners shall be tested for tension and shear capacity and tension and shear capacity influenced by edge condition for each thickness and support rail material and thickness to be recognized.

30 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page Specimens: Sample dimensions and the minimum number specimens per test type are found in Table 2. Panels shall be sampled from representative panel material from the same panel lots as those used for other required composite UHPC panel tests in Section 4.2. The visible fastener used in the connection test shall be representative of the fastener type for which recognition is sought Procedures: Visible Fasteners shall be tested in accordance with AISI 905 per the test type and number of specimens indicated on Table Conditions of Acceptance: The maximum tension and shear strength results shall be recorded along with average standard deviation, and Coefficient of Variation (COV). The results shall comply with the following: (a) the characteristic values of the test results shall be based on the lesser of the concrete strength, steel strength or connection strength of the tests in Table 1, test series 1a and 1b, determined in accordance with ACI 355.2, Appendix A2. The strength reduction factor, ɸ, shall be in accordance with ACI 318, Section (Category 1, Condition B); (b) Minimum edge distance and minimum spacing obtained from tests 2 and 3 shall be reported as minimum edge and minimum spacing. Minimum edge is defined as closest distance to the panel edge that a single anchor can develop 100 percent of its capacity obtained from test series 1 and 2 of Table 2. Minimum spacing is defined as closest distance between group of anchors away from edges that all anchors can develop 100 percent of its capacity obtained from test series 1 and 2 of Table QUALITY CONTROL

31 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page The panels shall be manufactured by fabricators under an approved quality control program with inspections by ICC-ES. The inspections shall occur on a periodic basis. The quality control program shall comply with the ICC-ES Acceptance Criteria for Quality Documentation (AC10), with documentation submitted for each panel manufacturing facility. 5.2 A qualifying inspection shall be conducted at each panel manufacturing facility when required by the ICC-ES Acceptance Criteria for Inspection Agencies (AC304). 5.3 Periodic special inspection is required in accordance with Sections and of the IBC. The inspections shall include inspection of field-installed anchors postinstalled in hardened composite UHPC panels and erection of composite UHPC panel members. 6.0 EVALUATION REPORT RECOGNITION 6.1 The evaluation report shall include descriptions of the concrete mix proportions (without proprietary information), the panels, installation instruction, and packaging and labeling information based on requirements in Section 2.1 of this criteria. 6.2 The evaluation report shall include the following information: Design loads for undercut anchors, including tested anchor dimensions, concrete strength, minimum embedment depth, minimum edge distance and minimum spacing to be used for design of composite UHPC panel systems Design loads for visible fasteners, including fastener size and type, concrete strength, minimum edge distance and minimum spacing to be used for design of composite UHPC panel systems.

32 COMPOSITE, ULTRA-HIGH PERFORMANCE CONCRETE Page Allowable flexural strength of composite UHPC panels to be limited for design of composite UHPC panel system A statement stating that design and details of the composite UHPC panel systems demonstrating compliance with the applicable code and this evaluation report must done by a registered design professional, and be submitted to and approved by the code official A statement stating that the composite UHPC panel design loads and deflection requirements shall be established by a registered design professional and they are outside of the scope of this evaluation report The evaluation report shall include a statement indicating that the use of the composite UHPC system in fire-resistance-rated construction has not been evaluated and outside the scope of this report, unless data in accordance with Section 3.8 of this criteria is provided. When recognition includes installation of the composite UHPC panel system as an integral/contributing component of fire-resistance-rated wall assemblies, the evaluation report shall provide details of the assemblies tested in accordance with ASTM E119 or UL The evaluation report shall specify the construction types for which the panel has been evaluated. When recognition includes installation of the panel on exterior walls in buildings of Type I through IV construction, based on optional testing in accordance with Sections 3.4 through 3.6 of this criteria, the evaluation report shall provide details of the assemblies tested in accordance with NFPA The evaluation report shall include a statement indicating that the registered design professional for the exterior wall framing systems supporting the UHPC