467 ALASKA 2020 SECTION 702
702-2.01 ASPHALT BIN DER . Meet AASHTO M 320 for the specified Performance Grade.
Re-refined engine oil bottoms (REOB) / vacuum tower asphalt extenders (VTAE) shall not be used as a modifier of Asphalt Binder. REOB/VTAE are materials as defined in Asphalt Institute document IS -235. Furnish a certificate of compliance according to Subsection 106- 1.05.1 certifying that REOB/VTAE were not us ed as a modifier of Asphalt Binder.
702-2.02 CUT -BACK AS PHALT . Meet AASHTO M 81 and M 82.
702-2.03 EMULSIFIED ASPHALT . Meet AASHTO M 140 and the following:
1.Cationic Emulsified Asphalt . Meet AASHTO M 208.
2.Special Tack Emulsion, STE -1. Meet the followin g, when tested using AASHTO T 59: TESTS ON EMULSION Viscosity @ 77 °F, SSF 30, max. Storage Stability, I day, % 1, max. Demulsibility, 35 mL 0.8% SDS, % 25, min. Particle Charge Positive* Sieve Test, % Retained 0.10, max. Distillation Oil by Vol. of Emulsion, % 5, max. Distillation Residue by Wt. of Emulsion, % 45, min. TESTS ON RESIDUE Penetration @ 77 °F 100-250 Ductility @ 77 °F, 5 cm/min., cm 40, min. Solubility in TCE, % 97.5, min. * If Particle Charge test is inconclusive, material having a max. pH value of 6.7 is acceptable.
702-2.04 STORAGE AND APPLICATION TEMPERA TURES . Store, mix, and apply asphalt
materials within the following temperature ranges: TABLE 702 -1 STORAGE AND APPLICAT ION TEMPERATURES Type and Grade of Material Spray °F Mix °F Storage °F MC-30 85+ 140, max. MC-250 165+ 165-220 240, max. RC-800 200+ 200, max. CRS -2 125-175 100-175 CRS -2P 125-175 100-175 CMS -2 125-175 120-160* 100-175 CSS-1 90-120 90-160* 50-125 STE-1 70-140 70-150 50-125 * Temperature of the emulsified asph alt in the pugmill mixture. Store, mix, and apply asphalt binder within the temperature ranges recommended by the manufacturer or shown on the approved Job Mix Design.
702-2.05 JOINT ADHES IVE. Meet the requirements of Table 702- 2.
468 ALASKA 20 20 TABLE 702 -2 ASPHALT JOI NT ADHESIVE
702-2.06 JOINT SEALA NT. Special Tack Emulsion (STE -1), undiluted CSS -1 meeting
Subsection 702- 2.03, or approved joint sealant listed on the Qualified Products List.
702-2.07 WARM MIX AS PHALT (WMA). WMA additives, processes and technologies shown in
Table 702- 3 are preapproved for use on Department projects. Satisfy asphalt binder and mix specification requirements after incorporating additi ves in the asphalt binder and/or mix. TABLE 702 -3 WMA TECHNOLOGIES
702-2.08 ASPHALT REL EASE AGENT . Use a release agent listed on the AASHTO -NTPEP
website. PROPERTY SPECIFICATION TEST METHOD Brookfield Viscosity, 400oF 4,000 -11,000 cP ATSM D2669 Cone Penetration, 77oF Flow, 140oF Resilience, 77oF Tensile Adhesion, 77oF Asphalt Compatibility 60-100 0.2-inch, max. 30%, min. 500%, min. Pass ASTM D5 329 Ductility, 77oF Ductility, 39.2oF 1-foot, min. 1-foot, min. ASTM D113 Softening Point 170oF, min. AASHTO T 53 WMA Technology Process Type WMA Supplier Advera WMA Foaming (Synthetic Zeolite) PQ Corporation Aspha- min Foaming (Synthetic Zeolite) Aspha- min Double Barrel Green / Green Pac Foaming Astec Industries, Inc. Eco-Foam II Foaming AESCO/Madsen Inc. Evotherm Chemical Additive Ingevity Rediset Chemical Additive Nouryon Chemoran (CWM) Chemical Additive Colas ZycoTherm Chemical Additive Zydex Industries Sasobit Organic Additive Sasol WaxAm ericas, Inc. Ultrafoam GX System Foaming Gencor Industries Inc. 469 ALASKA 2020 SECTION 703 AGGREGATES
703-2.01 FINE AGGREG ATE FOR CONCRETE . Meet AASHTO M 6, Class A, except as follows:
Delete paragraph 8.2 of AASHTO M 6 . Delete the following methods of sampling and testing: AASHTO T 11 Amount of Material Finer than No. 200 Sieve AASHTO T 27 Sieve Analysis AASHTO T 103 Soundness (freezing and thawing) And substitute the following : ATM 304 (Method A) Sieve Analysis of Fine and Coarse Aggregates and Material Finer Than No. 200 Sieve in Mineral Aggregates by Washing Add the following : Meet AASHTO T 104 using sodium sulfate solution. In AASHTO M 6, Section 7.1, table entitled “Deleteri ous Substances Limits”, change the maximum percent of material by mass finer than No. 200 Sieve in a. (concrete subject to surface abrasion), from 2.0 to 3.0.
703-2.02 COARSE AGGR EGATE FOR CONCRETE . AASHTO M 80, Class B, except as follows:
Delete the following methods of sampling and testing: AASHTO T 11 Amount of Material Finer than No. 200 Sieve AASHTO T 27 Sieve Analysis And substitute the following : ATM 304 (Method A) Sieve Analysis of Fine and Coarse Aggregates and Material Finer Than No. 200 Sieve in Mineral Aggregates by Washing Add the following : Meet AASHTO T 104 using sodium sulfate solution.
703-2.03 AGGREGATE F OR BASE AND SURFACE COURSE . Crushed stone or crushed
gravel, consisting of sound, tough, durable pebbles or rock fragments of uniform qual ity. Free from clay balls, vegetable matter, or other deleterious matters. Meet Table 703- 1: TABLE 703 -1 AGGREGATE QUALITY PR OPERTIES FOR BASE AN D SURFACE COURSE Meet Table 703- 2 aggregate gradation requirements, as determined by ATM 304: PROPERTY BASE COURSE SURFACE COURSE TEST METHOD L.A. Wear,% 50, max. 45, max. AASHTO T 96 Degradation Value 45, min. 45, min. ATM 313 Fracture,% 70, min. 70, min., 1 Face ATM 305 Liquid Limit --- 35, max. ATM 204 Plastic Index 6, max. 10, max. ATM 205 Sodium Sulfate Loss,% 9, max. (5 cycles) 9, max. (5 cycles) AASHTO T 104
Source: Alaska Standard Specifications for Highway Construction, 2020 Edition. Pages 495–496 of 584.