1202 - PERFORMANCE GRADED ASPHALT BINDER 1200 - 6
1202.1 Description
This specification covers performan ce graded asphalt binder (PGAB).
1202.2 Requirements
a. Provide material* that complies with the applicable requirements of SECTION 1201 and AASHTO M 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: ADDITIONAL 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. b. Provide the grade of material designated in the Contract Documents. KDOT will not make changes in 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.
1202.3 Test 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.
1202.4 Prequalification
Prequalify material according to SECTION 1201.
1202.5 Basis of Acceptance
See applicable requirements under SECTION 1201.
Performance Graded Asphalt Binder in other states
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