Special Provision No. 110S11 August 2007

Transcription

1 AMENDMENT TO OPSS 1002, APRIL 2004 Special Provision No. 110S11 August 2007 OPSS 1002, April 2004, Material Specification for Aggregates Concrete is deleted in its entirety and replaced with the following: SCOPE MATERIAL SPECIFICATION FOR AGGREGATES CONCRETE REFERENCES DEFINITIONS TABLE OF CONTENTS: SUBMISSION AND DESIGN REQUIREMENTS MATERIALS EQUIPMENT Not Used PRODUCTION QUALITY ASSURANCE OWNER PURCHASE OF MATERIAL Not Used SCOPE This specification covers material requirements for aggregates for use in hydraulic cement concrete REFERENCES This specification refers to the following standards, specifications, or publications: Ontario Provincial Standard Specifications OPSS 1001 Material Specification for Aggregates - General Ministry of Transportation (MTO), Ontario, Publications MTO Laboratory Testing Manual, Test Methods LS-412 LS-601 LS-602 LS-604 LS-606 Scaling Resistance of Concrete Surfaces Exposed to De-icing Chemicals Material Finer than 75µm Sieve in Mineral Aggregates by Washing Sieve Analysis of Aggregates Relative Density and Absorption of Coarse Aggregate Soundness of Aggregate by Use of Magnesium Sulphate August 2007 Page 1 of 15 SSP 110S11

2 LS-608 LS-609 LS-610 LS-613 LS-614 LS-616 LS-618 LS-619 LS-620 LS-624 LS-625 Percent Flat and Elongated Particles in Coarse Aggregate Petrographic Analysis of Coarse Aggregate Organic Impurities in Sands for Concrete Determination of Insoluble Residue of Carbonate Aggregates Freezing and Thawing of Coarse Aggregate Procedure for the Petrographic Examination of Fine Aggregate Resistance of Coarse Aggregate to Degradation by Abrasion in the Micro-Deval Apparatus Resistance of Fine Aggregate to Degradation by Abrasion in the Micro-Deval Apparatus Accelerated Detection of Potentially Deleterious Alkali-Silica Reactive Aggregate by Expansion of Mortar Bars Guidelines for the Use of Control Charts for Construction Aggregates Guidelines for Sampling of Granular Materials MTO Aggregate Sources Lists (ASL) Aggregate Sources List for Structural Concrete Fine and Coarse Aggregates Aggregate Sources List for Concrete Base/Pavement Coarse Aggregates Canadian Standards Association (CSA), Test Methods A23.1 Concrete Materials and Methods of Concrete Construction A23.2 Methods of Test for Concrete A23.2-1A Sampling Aggregates for Use In Concrete A A Relative Density and Absorption of Coarse Aggregate A A Potential Expansivity of Aggregates; Procedure for Length Change Due to Alkali-Aggregate Reaction in Concrete Prisms A A Method of Test for the Resistance of Fine Aggregate to Degradation by Abrasion in the Micro-Deval Apparatus A A Method of Test for Resistance of Unconfined Coarse Aggregate to Freezing and Thawing A A Test Method for Detection of Alkali-Silica Reactive Aggregate by Accelerated Expansion of Mortar Bars A A Determination of Potential Alkali-Carbonate Reactivity of Quarried Carbonate Rocks by Chemical Composition A A Standard Practice to Identify Potential for Alkali-Reactivity of Aggregates and Measures to Avoid Deleterious Expansion in Concrete A A Method of Test for the Resistance of Coarse Aggregate to Degradation by Abrasion in the Micro-Deval Apparatus American Society for Testing and Materials (ASTM), Test Methods C87 C330 C666 Effect of Organic Impurities in Fine Aggregate on Strength of Mortar Lightweight Aggregates for Structural Concrete Resistance of Concrete to Rapid Freezing and Thawing DEFINITIONS Alkali-Aggregate Reaction (AAR) means a chemical reaction that occurs in concrete between alkalis in the cement, e.g., sodium and potassium, and minerals in the aggregate. This reaction may cause deleterious expansion and cracking of the concrete. AAR includes alkali-carbonate and alkali-silica reactions. Air Cooled Blast Furnace Slag means the material resulting from solidification of molten blast furnace slag August 2007 Page 2 of 15 SSP 110S11

3 under atmospheric conditions. Subsequent cooling may be accelerated by application of water to the solidified surface. Bench means a ledge parallel to stratigraphic bedding that, in quarries, forms a single level of operation above which rock is excavated from a contiguous face. Control Chart means a graphical method used to monitor the central tendency and the variability of a material characteristic in order to control production. Duplicate Samples means two samples taken at the same time and location - one to be used for Quality Assurance Testing and the other for Referee Testing. Manufactured Sand means fine aggregate produced by crushing bedrock or containing crusher screenings. Mean means the arithmetic average of a set of data. Mineral Filler means a finely pulverized, inert, inorganic mineral or rock e.g., limestone powder, having physical and mineralogical properties suitable for use in concrete. Nominal Maximum Size means the largest sieve listed in the applicable specification upon which any material is permitted to be retained. Physical Property means an inherent attribute or feature of an aggregate material. Tests are carried out to determine a material's resistance to weathering and/or degradation. Physical properties are generally not affected by aggregate production processes. Quality Assurance (QA) means a system or series of activities carried out by the Owner to ensure that materials received from the Contractor meet the specified requirements. Quality Control (QC) means a system or series of activities carried out by the Contractor to ensure that materials supplied to the Owner meet the specified requirements. Self-Consolidating Concrete means a highly flowable, yet stable concrete that can spread readily into place, fill formwork, and encapsulate the reinforcement without any mechanical consolidation and without undergoing segregation or excessive bleeding. Siliceous Aggregates means rock particles containing or composed of silica (SiO 2 ) or minerals with silica in the crystal structure as silicate (Si0 4 - ). Statistical Control means when all sources of assignable variation have been removed, the variability of the process is confined to probability variation alone. August 2007 Page 3 of 15 SSP 110S11

4 SUBMISSION AND DESIGN REQUIREMENTS Submission of Test Data The Contractor shall provide Quality Control (QC) test results of all aggregates used in the Work from a laboratory meeting the requirements of clause Test results showing complete conformance with the grading and physical property requirements of this specification shall be submitted to the Contract Administrator at the time of submission of the concrete mix design. For multi-year contracts new QC test results shall be submitted within 12 months of the original mix design and every 12 months thereafter. The Stockpile Method or Control Chart Method shall be used for QC sampling and testing. QC test results shall be submitted using Form PH-CC-448a (Aggregate Test Data Concrete Physical Properties, Fine Aggregate), Form PH-CC-448b (Aggregate Test Data Concrete Physical Properties, Coarse Aggregate) as applicable. Test data forms must be legible and signed by the testing laboratory representative. Faxed copies are acceptable providing that the original is submitted to the Contract Administrator within five Business Days following receipt of the fax. Except as noted elsewhere in this specification, only aggregate sample test data obtained from stockpiled material to be used in the Work and tested within the past 14 months shall be submitted Stockpile Method Where the Stockpile Method is selected, the Contractor shall provide a letter to the Contract Administrator at the time of submission of test results, indicating the quantity of aggregates in each stockpile supplying material to the Work Control Chart Method Where the Control Chart Method is selected, control charts shall be prepared in accordance with LS-624. Each control chart shall contain information regarding control limits, physical property requirements, target values, testing frequency, sampling locations and time period over which the testing has taken place Laboratory Requirements An acceptable laboratory conducting tests for physical properties shall be one that holds a certificate from Canadian Council of Independent Laboratories (CCIL) as Type D for the applicable test methods and also participates in the annual MTO Proficiency Sample Testing Program for the specific tests. A participant list of qualified laboratories for the MTO Proficiency Sample Testing Program may be obtained from the Registry, Appraisal and Qualification System (RAQS) website ( An acceptable laboratory conducting tests for LS-601 and LS-602 shall be one that holds a valid certificate from CCIL as Type C. Testing for LS-601 and LS-602 shall be conducted by qualified laboratory staff who hold a valid certificate from CCIL in aggregate testing. Testing for LS-609 shall be conducted by a person holding a valid certificate from CCIL showing them qualified in petrographic examination. Equivalent alternate laboratory and technician certifications or laboratory proficiency sample testing programs may be used to demonstrate similar requirements, provided they are acceptable to the Owner. August 2007 Page 4 of 15 SSP 110S11

5 MATERIALS General Aggregates shall be according to OPSS Aggregates shall conform to this specification when tested according to the MTO, CSA and ASTM test methods identified herein. Except as noted below or elsewhere in the Contract Documents, aggregates may be sands, gravel, quarried rock or air-cooled blast furnace slag provided the source is of such a nature and extent as to ensure acceptable processed aggregates of a consistent grading and quality. When any change in the character of the aggregate occurs or when the performance of aggregate meeting the requirements of this specification is found to be unsatisfactory, use of the aggregate shall be discontinued until a reappraisal by the Contractor, with the approval of the Contract Administrator, proves the source to be satisfactory. Steel slag is prohibited for use as aggregate in hydraulic cement concrete. Air-cooled blast furnace slag is prohibited for use as aggregate in concrete pavements. Irrespective of compliance with the physical property requirements of this specification, aggregates may be accepted or rejected based on the demonstrated performance of the aggregate in accelerated freeze-thaw testing according to LS-412 and ASTM C666, or demonstrated past field performance in hydraulic cement concrete. The structure or pavement with which satisfactory field performance is demonstrated shall have been in the same environment and application to that in which the aggregate is proposed for use and shall be at least 15 years old. In the case of rejection, the structure or pavement may be of any age. Field performance shall be evaluated in general accordance with CSA A A Attachment A2, Guidelines for Evaluating the Field Performance of Aggregates: Field and Laboratory Testing Fine Aggregate General Manufactured sand made with carbonate rock, i.e., limestone and dolostone, shall not be accepted for use in a hydraulic cement concrete surface exposed to vehicular traffic due to the risk of polishing, unless the acid insoluble residue as determined by LS-613 is greater than 50% Grading Requirements Except as noted below, fine aggregates shall meet the grading requirements of Table 1. The fineness modulus for any sample shall not vary by more than 0.20 from the sample upon which initial acceptance was based Special Grading A fine aggregate with a grading falling outside the limits of Table 1 may be proposed for use providing all test data necessary to demonstrate that the material will produce concrete of acceptable quality meeting all relevant requirements specified elsewhere in the Contract Documents. Assessment of performance shall include, but not be limited to, the following tests: compressive strength, splitting tensile strength and drying shrinkage. Special gradings of fine aggregate shall be approved by the Owner prior to their use in the Work. August 2007 Page 5 of 15 SSP 110S11

6 Mineral Filler Mineral fillers shall be limited to use in Self-Consolidating Concrete. Where mineral fillers are added to the mix, they shall be inert, non-plastic, free of clay and added as a separate ingredient to the mix Physical Property Requirements Fine aggregate shall meet the physical property requirements of Table Coarse Aggregate Grading Requirements General Coarse aggregate grading requirements given in Table 3 and Table 4 represent the upper and lower limits allowed Concrete Structures, Sidewalks, Curb and Gutter The nominal maximum aggregate size shall be 19.0 mm, or as specified in the Contract Documents. Grading of the coarse aggregate shall be within the limits provided in Table 3. It is acceptable to stockpile aggregates in individual size fractions and blend them in the mix to meet the grading requirements Concrete Pavement and Concrete Base The grading of coarse aggregates used in concrete pavement and concrete base shall meet the requirements for 37.5 mm and 19 mm aggregate shown in Table 4. Aggregates shall be stockpiled as individual size fractions and blended in the mix to meet the combined grading requirements of Table Physical Property Requirements Coarse aggregate shall meet the physical property requirements of Table 5. When coarse aggregate contains more than 15% passing the 4.75 mm sieve, material finer than 4.75 mm shall also meet the physical property requirements of Table Scaling Resistance Coarse aggregate composed of more than 80% siliceous aggregates as determined by LS-609 shall be tested in a salt scaling test according to LS-412 together with either the fine aggregate that the coarse aggregate is intended to be used with, or a fine aggregate from the same geographic area as the coarse aggregate. For the purposes of this specification, the concrete for LS-412 shall be proportioned with 355 kg/m 3 of Type GU hydraulic cement, shall have a plastic air content of 7.0 ± 1.5% and a slump of 80 ± 20 mm. The maximum permitted loss shall be 0.80 kg/m 2 after 50 cycles of freezing and thawing. This test shall be done at the time of first use of a source for aggregate in concrete. The need for data to demonstrate compliance with this requirement shall be waived by the Contract Administrator if the source is on the current Ministry of Transportation regional Aggregate Sources List for Structural Concrete Fine and August 2007 Page 6 of 15 SSP 110S11

7 Coarse Aggregates or Aggregate Sources List for Concrete Base/Pavement Coarse Aggregates. Irrespective of the waiving of this requirement, the warranty provisions of the Contract Documents shall apply D-Line Cracking Coarse aggregate from limestone and dolostone bedrock quarries for concrete pavement and concrete base, except for aggregate produced from the Oxford, Gull River, or Bobcaygeon Formations, shall be tested in the concrete freezing and thawing test according to ASTM C666 Procedure A. For the purposes of this specification, ASTM C666 shall be conducted using the following parameters: The concrete for the test shall be proportioned with mm stone meeting the combined grading shown in Table 4, with 325 kg/m 3 of Type GU hydraulic cement, a plastic air content of 6.5 ± 1.5%, and a slump of 50 ± 20 mm; The fine aggregate shall be that which is intended for use with the coarse aggregate, or a fine aggregate from the same geographic area as the coarse aggregate; A minimum of three beams shall be tested; Procedure A shall be modified so that each freeze cycle takes 10.5 ± 1 hours; and The test shall be conducted for 350 cycles. The average change in length of the beams tested shall be no more than ± %. The average fundamental transverse frequency (FTF) shall not be less than 90% of the FTF at an age of 14 days. This test shall be done at the time of first use of a source for aggregate in concrete pavement or concrete base. The bench within the quarry from which the aggregate is selected for testing shall be identified by the Contractor. Approval of aggregate shall only apply to the bench of the quarry from which the aggregate was taken. Aggregate processed from other benches within the same quarry will require testing according to ASTM C666 Procedure A, as modified above, prior to use. The need for data to demonstrate compliance with this requirement shall be waived by the Contract Administrator if the source is on the current Ministry of Transportation regional Concrete Aggregate Sources List for Concrete Base/Pavement Coarse Aggregate. Irrespective of the waiving of this requirement, the warranty provisions of the Contract Documents shall apply Deleterious Expansion (other than Alkali Aggregate Reaction) Aggregates that produce excessive expansion or cracking of concrete through reactions other than AAR shall not be used in concrete. The total content of lime (CaO), periclase (MgO) and glass in the aggregate shall be less than 0.001% by mass. The content of gypsum and anhydrite shall be less than 1.0% by mass. Steel slag is prohibited Lightweight Aggregate Lightweight aggregate shall be according to ASTM C330. August 2007 Page 7 of 15 SSP 110S11

8 PRODUCTION Quality Control General The Contractor shall be responsible for all Quality Control (QC) sampling and testing required to demonstrate complete conformance of the aggregates with the physical and grading requirements of this specification. The Contractor shall select all QC laboratories and be responsible for all costs associated with testing for QC purposes. Records of all QC activities associated with aggregate production and testing (sampling data sheets, laboratory notes, non-conformance reports etc.) shall be provided to the Contract Administrator upon request. For any specific aggregate processing operation, the Contractor shall develop an average grading target for the particular source and production facility and control the grading within suitable tolerances from this target, so as to produce a workable, consistent concrete mix. QC testing for LS-601 and for LS-602 shall be conducted at a frequency chosen by the Contractor Aggregate Processing, Handling and Stockpiling Processed aggregates shall be separated into fine and coarse aggregates and stockpiled separately. Aggregates separated during processing, aggregates secured from different sources, and aggregates from the same source but of different gradings shall be stockpiled separately. Aggregates that have become mixed with foreign matter of any description, or aggregates that have become mixed with each other, shall not be used and shall be removed from the stockpile immediately. Once a stockpile has been produced, sampled and tested for QC under the procedure for Stockpile Method, no further aggregate may be added to the stockpile. When a stockpile is depleted, a new stockpile shall be constructed and additional sampling and testing shall be carried out as required. Stockpiles produced, sampled and tested for QC under the procedure for Control Chart Method may continue to have aggregate added provided that sampling and testing show that aggregate in the stockpile conforms to this specification and that production remains in statistical control. Aggregate shall be retained in stockpiles for at least 24 hours before use. Suitable stockpile locations include the construction site and the site of batching of the concrete. Other locations may be used for stockpiles provided they are acceptable to the Contract Administrator Stockpile Method Test data shall be obtained from samples taken from stockpiled material to be used in the Work with the following exceptions: a) test data for CSA A A shall have been obtained within the past 18 months from aggregate from the same location within the source which is to be used in the Work; b) where the quantity of concrete required for the Work is less than 100 m 3 and it is not intended to be used in a structure, aggregate test data obtained within the past 14 months from the same source which is to be used in the Work, may be provided. One set of test results demonstrating conformance of the aggregates in stockpile with the physical property August 2007 Page 8 of 15 SSP 110S11

9 requirements of this specification shall be completed for each 5,000 m 3 or part thereof, of concrete produced. Additional test data is required whenever material is produced from a new source or a new bench in a quarry, or whenever a significant change in aggregate production occurs that may affect physical quality Control Chart Method Test data shall be obtained from samples taken from stockpiled material to be used in the Work. The Contractor shall use a Type 1 control chart in accordance with LS-624, for each physical property requirement. When the control chart has been established, the minimum frequency of sampling and further testing shall be as follows: a) annually, i.e., obtained within the past 12 months - where the mean value (n = 20) of the physical property is less than or equal to the values given in Table 7 and the Type 1 control chart demonstrates the process to be in statistical control; or b) three times a year, spaced evenly throughout the aggregate production season - where the mean value (n = 20) of the physical property is greater than the values given in Table 7, or the Type 1 control chart demonstrates the process to be out of statistical control. New control charts are required whenever aggregate is produced from a new source or a new bench in a quarry QUALITY ASSURANCE General The Regional Quality Assurance (QA) Laboratory designated by the Owner shall carry out testing for purposes of ensuring that aggregates used in the Work conform to the physical property and grading requirements of this specification. The Owner shall be responsible for all costs associated with testing for QA purposes unless otherwise indicated in this specification. In addition to the requirements given below, all samples shall meet the general requirements for Quality Assurance, referee and other testing as detailed elsewhere in the Contract Documents Sampling Sampling shall be according to CSA A23.2-1A and LS-625. QA samples shall be taken from stockpiles located at the concrete plant, or in the absence of a stockpile at the plant, from stockpiles at the aggregate source. The Contractor shall provide new or clean sample bags or containers that are constructed to prevent the loss of any part of the material or contamination or damage to the contents during shipment. Sample containers shall hold no more than 30 kg of material and shall be securely fastened. Metal or cardboard containers are unacceptable. The sample shall be identified both inside and outside of the sample container. Data to be included with the sample shall conform to the requirements of Form PH-D-10 (Sample Data Sheet). All QA samples shall be duplicate samples. At least one set of QA samples from each aggregate shall be randomly obtained during production for every lot of 5,000 m 3 or part thereof, of each concrete mix. In the event that the Contractor is unavailable to take samples, no further materials shall be placed in the Work until August 2007 Page 9 of 15 SSP 110S11

10 the required QA samples have been taken. The Contract Administrator shall seal each sample container at the time and place of sampling Sample Size QA samples shall meet the minimum mass requirements of Table 6 and shall provide sufficient material to successfully complete all gradation and physical property tests required buy this specification. Individual sample containers shall hold no more than 30 kg of aggregate. Where more than 30 kg is required, additional containers shall be used and the total sample recombined by the QA laboratory prior to testing Testing and Retention of Samples One of the duplicate QA samples shall be randomly selected for testing by the QA laboratory. The QA laboratory shall retain the remaining sample for possible referee testing Acceptance QA test results will be used for acceptance purposes except where referee testing has been carried out. When QA test results show that the aggregates used in the concrete meet the physical property requirements of this specification, they shall be accepted. When QA test results show that the aggregates do not meet the physical property requirements, the Contract Administrator will notify the Contractor that tested aggregates from a particular source, including aggregates in existing stockpiles or in the Work, shall not be accepted. The Contractor will be notified in writing within three Business Days of receipt of the non-conforming data. The Contractor has the option of either removing unacceptable material from the Work and selecting a new source or invoking referee testing for LS-606, LS-609, LS-614 and LS-618. The Contractor shall notify the Contract Administrator of the selected option within two Business Days following the Contract Administrator s notification that aggregates do not meet the requirements of this specification and indicate in writing, the material and specific attribute or attributes for which referee testing is being requested Referee Testing The retained duplicate QA sample shall be used for referee testing. The Owner shall deliver the referee sample to the designated laboratory. If referee materials are not available, the Contractor shall be responsible for obtaining new samples from a location to be decided by the Contract Administrator. The Contract Administrator must be present to witness the sampling. Where applicable, a control aggregate sample for each referee test shall also be carried out according to the requirements of the test method. When referee test results show that the aggregates meet the requirements of this specification, the aggregates shall be accepted. When the referee test results show that the aggregates do not meet the requirements of this specification, the aggregates from the source, including aggregates in existing stockpiles or in the Work, shall not be accepted. The Contractor shall remove all unaccepted material from the Work at no cost to the Owner. At the Owners option, the Contractor may negotiate a reduced price payment for in lieu of removal provided the referee test values for LS-606, LS-609 or LS-618 do not: exceed the requirement for LS-614 or LS-606 by more than 25% of the specified value; or August 2007 Page 10 of 15 SSP 110S11

11 exceed the requirement for Petrographic Number according to LS-609 by 135 (pavement) and 150 (structural). exceed the requirement for LS-618 by more than 10% of the specified value; or The minimum price reduction will be $10.00 for each cubic metre of concrete incorporating the unaccepted aggregate. Irrespective of the negotiation of a reduced price payment, the warranty provisions of the Contract Documents shall apply. Fees for referee testing are at fixed unit rates. A list of rates is available from the regional MTO Contracts Office (Quality Assurance Section). The Owner will be responsible for the cost of referee testing provided the referee test results show that the aggregates are accepted without any price reduction; otherwise, the Contractor shall be responsible. TABLE 1. Grading Requirements for Fine Aggregates, LS-602 MTO Sieve Designation Percent Passing 9.5 mm mm mm mm µm µm µm µm 0-3 (Natural Sand) 0-6 (Manufactured Sand) Notes: Fine aggregates shall have no more than 45% passing any sieve and retained on the next consecutive sieve. The fineness modulus shall be a minimum of 2.3 and a maximum of 3.1. TABLE 2. Physical Property Requirements for Fine Aggregates MTO or CSA Test Number Laboratory Test Acceptance Limit LS-610 Organic Impurities, Organic plate number (Note 1) 3 LS-619 or Micro-Deval Abrasion, CSA A A % maximum loss 20 LS-620 or Accelerated Mortar Bar, CSA A A % maximum at 14 days (Notes 2 and3) CSA A A Concrete Prism Expansion, % maximum at 1 year (Notes 2 and 4) Notes: 1. A fine aggregate producing a colour darker than standard colour No 3 shall be considered to have failed this requirement. A failed fine aggregate may be used if comparative mortar specimens prepared according to ASTM C87 meet the following requirements: mortar specimens prepared using unwashed fine aggregate shall have a 7-day compressive strength that is a minimum of 95% of the strength of mortar specimens prepared using the same fine aggregate washed in a 3% sodium hydroxide solution. Type GU hydraulic cement shall be used. setting time of the unwashed fine aggregate mortar specimens shall not differ from washed fine aggregate mortar specimens by more than 10%. August 2007 Page 11 of 15 SSP 110S11

12 2. The need for data to demonstrate compliance with this requirement shall be waived by the Contract Administrator if the aggregate source is on the current Ministry of Transportation's regional Aggregate Sources List for Structural Concrete Fine and Coarse Aggregates. 3. An aggregate that fails this requirement may be accepted provided the requirements of CSA A A are met. 4. An aggregate need only meet this requirement if it fails the requirements of CSA A A. Test data shall have been obtained within the past 18 months from aggregate that is from the same source, processed in the same manner, as the material intended for use. TABLE 3. Grading Requirements for Coarse Aggregate, LS-602 Structural Concrete, Sidewalks, Curb & Gutter Nominal Maximum Size 19.0 mm 16.0 mm 13.2 mm 9.5 mm 6.7 mm MTO Sieve Designation, mm Percent Passing TABLE 4. Grading Requirements for Coarse Aggregate, LS-602 Concrete Pavement or Concrete Base Nominal Maximum Size 37.5 mm 19.0 mm Combined MTO Sieve Designation, mm Percent Passing August 2007 Page 12 of 15 SSP 110S11

13 MTO or CSA Test Number LS-601 LS-604 or CSA A A LS-608 LS-609 LS-614 or CSA A A LS-618 or CSA A A LS-620 or CSA A A CSA A A CSA A A TABLE 5. Physical Property Requirements for Coarse Aggregate Laboratory Test Material Finer than 75 µm Sieve, by Washing, % maximum (Note 1) - for gravel - for crushed rock Acceptance Requirements Pavement Structures, Sidewalk, Curb and Gutter, and Concrete Base Absorption, % maximum Flat and Elongated Particles, % maximum Petrographic Number, Concrete, maximum Unconfined Freeze-Thaw Loss, % maximum (Note 2) Micro-Deval Abrasion Loss, % maximum Accelerated Mortar Bar Expansion, % maximum at 14 days (Notes 3 and 4) Concrete Prism Expansion Test, % maximum at one year (Notes 3 and 6) Potential Alkali-Carbonate Reactivity of Quarried Carbonate Rock (Note 7) Alternative Requirement for LS (Note 5) (Note 5) Chemical composition must plot in the nonexpansive field of Fig. 1 of test method Magnesium Sulphate LS-606 Soundness Loss, 5 Cycles, % maximum (Note 2) Notes: Where a concrete surface is subject to vehicular traffic, the physical requirements for "Pavement" will apply to the aggregate used. For air-cooled blast-furnace slag aggregate, the allowable maximum value for Micro-Deval shall be 21% for structures and pavements and the allowable maximum value for Absorption will conform to the Owner's requirements for slag aggregate. A coarse aggregate may be accepted or rejected by the Owner based on the results of freeze-thaw testing of concrete or field performance. 1. When control charts (n>20) are used for LS-601 for gravels, the average value shall not exceed the specification maximum (1.0 %), with no single value greater than 1.4 %. When control charts (n>20) are used for LS-601 for crushed rock, the average value shall not exceed the specification maximum (2.0 %), with no single value greater than 2.4 %. 2. The Owner will waive the requirements for freeze-thaw loss when the aggregate meets the alternative magnesium sulphate soundness requirements, LS The need to demonstrate compliance with this requirement will be waived by the Contract Administrator August 2007 Page 13 of 15 SSP 110S11

14 if the source is on the current Ministry of Transportation regional Aggregate Sources List (ASL) for Structural Concrete Fine and Coarse Aggregates or the Aggregate Sources List of Concrete Base/Pavement Coarse Aggregates. If the aggregate is potentially expansive due to alkali-carbonate reaction as determined by CSA A A, the aggregate shall meet the requirements of CSA A A, even though it may be shown as a coarse aggregate on the ASL for Structural Concrete Fine and Coarse Aggregates or the ASL for Concrete Base/Pavement Coarse Aggregates. 4. An aggregate that fails to meet these requirements will be accepted by the Contract Administrator provided the requirements of CSA A A are met. 5. If the aggregate is a quarried sandstone, siltstone, granite or gneiss, the expansion shall be less than 0.080% after 14 days. For quarried aggregates of the Gull River, Bobcaygeon, Verulam and Lindsay Formations, the expansion shall be less than 0.100% after 14 days. 6. An aggregate needs to meet this requirement only if it fails the requirements of either CSA A A, or CSA A A. The test data shall have been obtained within the past 18 months from aggregate from the same location within the source as that to be used in the Work. If this test is conducted to show that an aggregate deemed potentially expansive by CSA A A does not exceed 0.040% after one year, then chemical analysis, CSA A A, shall be provided to show that the aggregate intended for use has the same chemical composition as the material tested in CSA A A. 7. This requirement only applies to aggregate quarried from the Gull River and Bobcaygeon Formations of southern and eastern Ontario. These dolomitic limestones outcrop on the southern margin of the Canadian Shield from Midland to Kingston and in the Ottawa-St Lawrence Lowlands near Cornwall. TABLE 6. Sample Size Material Minimum Mass, kg Fine aggregate mm coarse aggregate mm coarse aggregate 50 Note: Individual shipping containers shall hold no more than 30 kg of aggregate. Where more than 30 kg is required, additional sample containers shall be used. August 2007 Page 14 of 15 SSP 110S11

15 TABLE 7. Mean Values of Physical Properties for Determination of Testing Frequency for Use with Control Charts MTO or CSA Test Number LS-601 Laboratory Test Material Finer than 75 µm Sieve, by Washing, % maximum Pavement Coarse Aggregate Structures, Sidewalk, Curb and Gutter, Concrete Base Fine Aggregate (Note 1) (Note 1) (Note 1) LS-602 Sieve Analysis, % passing (Note 1) (Note 1) (Note 1) LS-604 or CSA A A LS-606 LS-608 LS-609 LS-614 or CSA A A LS-618 or CSA A A LS-619 or CSA A A LS-620 or CSA A A CSA A A CSA A A Absorption, % maximum Magnesium Sulphate Soundness Loss, 5 Cycles, % maximum loss Flat and Elongated Particles, % maximum Petrographic Number, Concrete, maximum Unconfined Freeze-Thaw Loss, % maximum Micro-Deval Abrasion Loss, Coarse Aggregate, % maximum Micro-Deval Abrasion Loss, Fine Aggregate, % maximum Accelerated Mortar Bar Expansion, % maximum at 14 days Potential Alkali-Carbonate Reactivity of Quarried Carbonate Rock Concrete Prism Expansion Test, % maximum at one year (Note 2) (Note 2) (Note 2) (Note 3) (Note 3) - (Note 4) (Note 4) (Note 4) Notes: 1. Refer to clause Value is for quarried sandstone, siltstone, granite, or gneiss. 3. Do once annually. For quarried dolomitic limestone from the Gull River and Bobcaygeon Formations only. (Also see Note 2 of Table 5.) 4. Do once annually. For aggregate failing the requirements of either CSA A A or CSA A A only. (Also see Note 6 of Table 5.) August 2007 Page 15 of 15 SSP 110S11