1201 - GENERAL REQUIREMENTS FOR DIVISION 1200 - ASPHALT MATERIALS 1200 - 4 (c) Under any of the operations described above, if the results of any of the QC tests indicate the product may be out of specification, stop shipment from that source immediately. Perform a complete AASHTO SC test to ascertain the product status and re-certify the source.
Provide appropriate circulation or agitation in storage if separation of the modifier is expected, suspected or if the modified asphalt will be stored at elevated temperature for more than one day before use.
1201.3TEST METHODS
As described in the specification for each type of asphalt material.
1201.4PREQUALIFICATION
this specification that has not previously been produced by them , or which has not been used on KDOT projects within the last 12 months. PGAB producers will also be required to submit material that complies with SECTION qualified or re-qualified, submit samples taken from a production batch, along with a copy of the producer's complete AASHTO test results on the same material to the Engineer of Tests. The Engineer will test the sample and compare the results. The pr oducer will be notified of the results in writing.
require requalification. Contact the Engineer of Tests' Ch ief Chemist to determine if requalification is necessary.
the requirements of this specification. Producers of performance graded asphalt binder must also address any requirements in the latest edition of AASHTO R 26 that are not specifically covered here. Submit a copy of the written quality control plan to the Bureau of Construction and Materials for review and approval. Quality control plans and the testing inform ation contained therein will be maintained as confidential by KDOT. An approved plan is a required prerequisite to prequalification of any product. In addition to the requirements specified in AASHTO R 26, include provisions in the QC plan for maintaining the mixing and compaction temperature ranges using the following guidelines:
certificate. Once 3 sets of tests for temperature ranges have been accumulated, then maintain a 3-point moving average. Maintain the mixing and compaction temperatur e ranges constant unless there is a change to any component (example: upper compaction temperature) of the 3-point moving averages by more than 40ºF. If this occurs, then replace all of the old temperature ranges with the 3-point moving av erage temperature ranges. Provide a monthly copy of all individual and 3-po int moving average temperature ranges to the Chief Chemist at the Materials and Research Center. Provide the Contractor with the most current mixing and compaction temperature ranges as outlined above.
description of the method used by your laboratory to determine the modified PGAB mixing and compaction temperature ranges in the QC Plan.
specific types and grades of materials. Qualified produ cers will be permitted to supply qualified materials on a certification basis. Monthly loading logs and results of the producer's quality control testing are required to be forwarded to the Engineer of Tests to maintain status on the prequalified list. In add ition, suppliers of CRS-1HP and EBL are to submit up to two samples per year to the Engin eer of Tests at the Materials and Research Center at the request of the Chief Chemist to maintain status on the prequalified list.
Producers must participate in this program for each type of material they have prequalified. When notified by KDOT, producers will be required to split a sample, test the material according to specifications, and send KDOT a portion to test along with their test results. The 2 sets of test results will be compared using the precision and bias guidelines outlined by AASHTO. If there are any discrepancies in the test results that cannot be resolved, a 1201 - GENERAL REQUIREMENTS FOR DIVISION 1200 - ASPHALT MATERIALS 1200 - 5 laboratory inspection may be necessary. Producer labora tories that are AMRL certified will be exempt from this program.
1201.2d.(2) and verification testing conducted by the KDOT will be used to determine the reliability of the producer's certifications. If any of these data indicate that the certifications are not reliable, permission granted to the producer to supply asphalt materials on the basis of certification will be withdraw n. The producer may still supply asphalt materials, but the conten ts of each shipping container must be sampled and tested by KDOT before acceptance for use. This pr ocedure will be followed un til the producer has provided to the Bureau Chief of Construction and Materials, adequate indication that future certifications will be reliable.
1201.5BASIS OF ACCEPTANCE
specification will be accepted upon receipt and approval by the Fiel d Engineer of a certifi cation prepared by the producer to cover the quality and quantity of material in each shipping container. Certif ications must be based on the results of the producer's quality control testing as required in subsection 1201.2d.(2) .
based on the results of tests by the Materials and Research Center on samples from each sh ipping container. Testing must be completed before incorporation of the product into the project. 1202 - PERFORMANCE GRADED ASPHALT BINDER 1200 - 6 SECTION 1202
PERFORMANCE GRADED ASPHALT BINDER
1202.1DESCRIPTION
This specification covers performance graded asphalt binder (PGAB).
1202.2REQUIREMENTS
320. Polymer modified binders must meet the additional requirements shown in TABLE 1202-1 . *Perform all tests after adding 0.5% high molecular wei ght amine antistripping agent (by weight) to the PGAB. Contact the Chief Chemist, Bureau of Construction and Ma terials, for a list of acceptable high molecular weight amines. TABLE 1202-1: ADDITIO NAL REQUIREMENTS Temperature Spread 1, °C 86 92 98 104 110 Separation, ASTM D 5976, ºC max. Run on Original Binder 2 2 22 2 2 Elastic Recovery, ASTM D 6084, Procedure A, % min. Run on RTFO Residue 50 60 65 75 80 1 Temperature Spread is determined by subtracting low temperature from high temperature; for example PG 64-28: 64-(-28) = 92 2For PG 70-28 RCI, separation test requirement no greater than 6.
the grade of asphalt. The Contractor may substitute PGAB that complies with or exceeds the upper and lower grade designations for the grade specified. For example, if a maintenance overlay specifies a PG 58-22, a PG 64-22 or a PG 58-28 will also be accepted. Such substitutions require advance approval by the Engineer and a no-cost change order.
1202.3TEST METHODS
Test according to the app licable provisions of ASTM D 5976, D 6084 and AASHTO T 48, T 240, T 313, T 315, T 316, and R 28.
1202.4PREQUALIFICATION
Prequalify material according to SECTION 1201 .
1202.5BASIS OF ACCEPTANCE
See applicable requirements under SECTION 1201 .