Special Provision No. 111F09 December Additional Test Results and Samples for Performance Graded Asphalt Cement (PGAC)

Transcription

1 AMENDMENT TO OPSS 1101, APRIL 2007 Special Provision No. 111F09 December 2013 Additional Test Results and Samples for Performance Graded Asphalt Cement (PGAC) REFERENCES Section of OPSS 1101 is amended by the deletion of the following: Ontario Provincial Standard Specifications, Material OPSS 1151 Superpave and Stone Mastic Asphalt Mixtures ASTM International D Standard Practice for Random Sampling of Construction Materials American Association of State Highway and Transportation Officials (AASHTO) T Sampling Bituminous Materials Section of OPSS 1101 is amended by the addition of the following under American Association of State Highway and Transportation Officials (AASHTO): TP 70 Multiple Stress Creep and Recovery (MSCR) of Asphalt Binder Using a Dynamic Shear Rheometer (DSR) T Sampling of Bituminous Materials Section of OPSS 1101 is amended by the addition of the following: Ministry of Transportation Publication: MTO Laboratory Testing Manual: LS 227 Determination of Ash Content LS 299 Determining Asphalt Cement s Resistance to Ductile Failure Using Double-Edge-Notched Tension Test (DENT) LS 308 Determination of Performance Grade of Physically Aged Asphalt Cement Using Extended Bending Beam Rheometer (BBR) Method DEFINITIONS Section of OPSS 1101 is amended by the addition of the following: Low Temperature Limiting Grade (LTLG) means the warmest of the Limiting Grades, T L obtained for 1 hour, 24 hours, 72 hours and the two conditioning temperatures according to LS-308, and Form B of LS-308. December 2013 Page 1 of 6 SSP 111F09

2 Low Temperature Performance Grade (-YY) means the low temperature performance grade specified elsewhere in the Contract Documents and also referred to as the YY specified for the performance graded asphalt cement where the PGAC Grade specified is PG XX-YY, and the minimum design pavement temperature DESIGN AND SUBMISSION REQUIREMENTS Submission Requirements PGAC Test Documentation Point b) of clause of OPSS 1101 is deleted in its entirety and replaced with the following: b) The minimum temperature of the HMA immediately after spreading, recommended by the PGAC supplier. This information is required when paving on bridge decks only. Point e) of clause of OPSS 1101 is deleted in its entirety and replaced with the following: e) When the PGAC contains any PPA and a liquid anti-stripping additive is incorporated into the PGAC at the PGAC supplier s depot: i. Information on how much anti-stripping additive was added to the PGAC and; ii. Documentation from the PGAC supplier stating that the PPA modified PGAC with the liquid antistripping additive added at the PGAC supplier s depot shall meet all requirements of AASHTO M320 for the PGAC grade specified in the Contract Documents MATERIALS Section of OPSS 1101 is amended by the addition of the following: PGAC 70-28, 70-34, and shall not contain more than 0.5% polyphosphoric acid (PPA) and shall only be used as a catalyst for the purpose of modification with polymers. Other grades of PGAC shall contain no more than 1.0% polyphosphoric acid. All grades of PGAC shall not contain any orthophosphoric acid. PGAC grades shall meet the additional requirements specified in Table PRODUCTION Quality Control Subsection of OPSS 1101 is deleted in its entirety QUALITY ASSURANCE Basis of Acceptance Subsection of OPSS 1101 is deleted in its entirety and replaced with the following: Material acceptance of asphalt cement for performance grading and the properties and attributes specified in Table 1 shall be based on QA test results conducted by the Owner s designated laboratory, unless superseded by referee test results, subject to the conditions specified in the Contract Documents December 2013 Page 2 of 6 SSP 111F09

3 Test results used to determine if the material complies with the requirements of the Contract Documents shall be forwarded to the Contractor Anti-Stripping Additive Subsection of OPSS 1101 is deleted in its entirety and replaced with the following: An allowance may be made for the impact of the anti-stripping additive on a PGAC grade for QA or referee purposes provided that a written request is submitted to the Contract Administrator with complete AASHTO M 320 test results for the following: a) Asphalt cement with anti-stripping additive at the percentage identified in the mix design. b) Asphalt cement without the anti-stripping additive Sampling Subsection of OPSS 1101 is deleted in its entirety and replaced with the following: All test samples shall be obtained during the production of the asphalt mix at the asphalt mix plant from the storage tank which is directly feeding the production of the asphalt mix according to AASHTO T 40 and the asphalt plant s health and safety plan. The asphalt plant s health and safety plan and procedure for sampling shall be reviewed at the pre-pave meeting. The QA, referee, and other required samples for possible Owner testing shall be taken at the same time. PGAC shall be sampled when notified by the Contract Administrator. Sampling frequency and minimum quantities shall be according to Table 2. Additional labelling and delivery requirements are provided in Table 2. Samples shall be delivered in a condition suitable for testing Quality Assurance Testing Subsection of OPSS 1101 is amended by the deletion of the first paragraph in its entirety. Subsection of OPSS 1101 is further amended by the addition of the following: Test results for lots that do not comply with asphalt cement acceptance requirements specified in Table 1 shall be categorized according to Table 1. When a lot does not comply with more than one property, attribute and PG grading, acceptance of the HMA shall be dealt with using the property, attribute or PG grading selected by the Owner Referee Testing Subsection of OPSS 1101 is deleted in its entirety and replaced with the following: Referee testing by an independent laboratory may be invoked by the Contractor for any lot of PGAC within 5 Days of receiving all the QA test results for the lot. December 2013 Page 3 of 6 SSP 111F09

4 Referee testing may only be invoked if all referee samples have been received in a condition suitable for testing. The referee testing shall determine the actual performance high and low temperatures, rounded to the nearest 0.5 C of the PGAC and the properties and attributes in Table 1 that acceptance criteria are specified for. Test results generated by the referee laboratory shall be used to re-evaluate the lot to determine whether the product conforms to the Contract Documents and the disposition of the HMA. Referee testing costs as specified elsewhere in the Contract Documents shall be borne by the Contractor, unless the referee testing confirms total conformance of the PGAC sample to the Contract Documents when the QA testing did not, in which case the costs shall be borne by the Owner Disposition of HMA Produced with Borderline and Rejectable Lots Subsection of OPSS 1101 is amended by the addition of the following: The Owner s review of the test results to determine disposition of the HMA produced shall include all additional testing requirements for which acceptance requirements have been specified. OPSS 1101 is amended by the addition of Table 1 and Table 2. December 2013 Page 4 of 6 SSP 111F09

5 PGAC Grade All PGAC Grades All PGAC Grades except PG58-28 and PG52-34 Table 1 Additional Testing Requirements and Acceptance Criteria for PGAC Grades Property and Test Method Results Acceptance Major Rejectable Attributes Reported Criteria Borderline (Unit) Rounded to the Nearest Ash Content, % by mass of residue (%) Low temperature limiting grade (LTLG) ( C) Grade Loss ( C) Non-recoverable creep compliance at 3.2 kpa (J nr-3.2 ) (kpa -1 ) Average percent recovery at 3.2 kpa (R 3.2 ) (%) Percent difference in non-recoverable creep compliance between 0.1 kpa and 3.2 kpa, J nrdiff (%) Average critical crack tip opening displacement ( t ) (mm) LS N/A >1.0 LS LS-308 and Form B of LS-308 Multiple Stress Creep and Recovery (MSCR) testing according to AASHTO TP 70 testing conducted at a temperature of * C 0.5 N/A Testing carried out only for information purposes < 4.0 N/A > the lesser of [(29.371) (J nr-3.2 ) ] or 55 LS > ** N/A > the lesser of [(29.371) (J nr-3.2 ) ] or 50 N/A Testing carried out only for information purposes. < *** and **** (Note 1) < **** Notes: 1. Disposition of HMA produced using any PGAC that is categorized as Major Borderline for t alone shall be issued an administration advisory. December 2013 Page 5 of 6 SSP 111F09

6 Table 2 Sampling Requirements Samples Frequency Minimum Sample Quantity Labelling QA Each Lot 2 litres (Note 1) Label shall Referee Each Lot 2 litres (Note 1) include: Grade Supplier Samples for possible Owner testing First Lot for each grade and source of asphalt cement used on Contract and for any subsequent Lot requested by the Contract Administrator. 4 litres (Note 2) Label shall include: Grade Supplier AAT Delivery Samples shall be delivered as specified in the Contract Documents. Samples shall be delivered at the same time. Samples shall be delivered at the same time. Samples shall be delivered within 7 Days of sampling to: Attention: Bituminous Laboratory Room 15, Building C 1201 Wilson Ave. Toronto, ON M3M 1J8 Notes: 1. 2 litres shall be provided in 2, suitable one litre containers or a container able to hold a minimum of 2 litres litres shall be provided in 4, suitable one litre containers or a container able to hold a minimum of 4 litres. December 2013 Page 6 of 6 SSP 111F09