1. MATERIALS: A. Liquid Asphalt Emulsion Liquid asphalt grade shall be CRS-2P meeting the requirements of ASTM D2397 and AASHTO M208, or submit alternate materials for consideration. B. Latex Additive The latex additive shall be Ultrapave 70 (Anionic) or Ultrapave 1156 (Cationic) or equivalent. It is required that the latex be co-milled at the bulk emulsion facility, to ensure complete and balanced blending. The emulsion manufacturing plant must be open to inspection by the Town. The liquid asphalt used in the specified emulsion shall consist of 3% latex additive. C. Aggregate The aggregate shall be crushed quarry stone free from dust, debris, soft stone or other contaminates with 75% of the stones having a fractured face. All stone shall satisfy a 35% maximum for the L.A. abrasion test and a 35% maximum for the flakiness test. A suggested aggregate gradation is as follows: 1/4” STONE: SIEVE SIZE % PASSING (1/2”) 100 (3/8”) 100 (1/4”) 70 – 100 (#4) 0 – 25 (#8) 0 - 5 3/8” STONE: SIEVE SIZE % PASSING (1/2”) 100 (3/8”) 85 – 100 (1/4”) 10 – 60 (#4) 0 – 25 (#8) 0 - 5 The contractor is responsible for determining the correct gradation based upon material products selected for use and the site conditions. The intent is to provide a properly sealed pavement with dense stone coverage and no flushing.
