883.1 General Description
This section covers mineral filler used as an ingredient in bituminous paving mixtures. Use mineral filler listed in the approved Asphalt Mix Design and Job Mix Formula and in Qualified Products List (QPL) 81. Use an approved mineral filler that meets the requirements below and consist of finely divided rock dust, slag dust, hydrated lime, hydraulic cement, or fly ash. Other fine, inert, non-toxic materials produced as by-products of industrial processes and meeting the requirements below may be approved as mineral filler based on satisfactory performance in the asphalt mix design procedure. Ensure mineral filler is sufficiently dry, flows freely, and is free from lumps.
883.1.01 Related References
A. Standard Specifications General Provisions 101 through 150. B. Referenced Documents QPL81 AASHTO R 28 AASHTO T 240 AASHTO T 313 AASHTO T 315 GDT-22 GDT 123
883.2 Materials
883.2.01 Mineral Filler
A. Requirements Use mineral filler meeting the following gradation limits: Sieve Size Percent Passing No. 30 (600 µm) 100 No. 50 (300 µm) 95-100 No. 200 (75 µm) 55-100 Ensure that the mineral filler is free from impurities. Subject mineral filler for use in Stone Matrix Asphalt (SMA) to mortar property testing according to AASHTO T- 240, AASHTO R-28, AASHTO T-313, and AASHTO T-315. Mineral filler may be rejected and removed from QPL- 81 for unsatisfactory performance as an ingredient in an asphalt mixture, as determined in these procedures or in the SMA Mix design procedure, GDT-123. Ensure the total fine mortar meets the following requirements: Test Specification Unaged DSR, G*/sinδ(kPa) 5 minimum RTFO Aged DSR, G*/sinδ(kPa) 11 minimum PAV Aged BBR, Stiffness (MPa) 1500 maximum B. Fabrication General Provisions 101 through 150. C. Acceptance Test gradation according to GDT-22. D. Materials Warranty General Provisions 101 through 150.
Mineral Filler in other states
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