Specifications include, but are not limited to: Crack Sealing in the Crack Sealing in the Towns of Amherst, Aurora, Clifton, Gouldsboro, Sullivan and Township of T28 MD, Counties of Hancock and Penobscot, Maine; ASPHALT RUBBER CRACK SEALER TYPE 4, APPLIED, QTY LB 30,705.000; This work shall consist of crack cleaning and drying, material supply and heating, preparation and application of material, material finishing or shaping, and providing and installing barrier material or curing materials used to seal longitudinal and transverse cracks in bituminous concrete pavements as directed and in in accordance with these Special Provisions.; The Department will allow Polymer Modified Asphalt Crack Sealant with fiber as an option for Ultra-Thin Bonded Wearing Course (UTBWC) and other treatments that specify Type 2 or Type 4 sealants in the contract. If the option to utilize Polymer Modified Asphalt Crack Sealant with fiber is selected the sealant and equipment requirements shall meet the following criteria and shall be subject to approval by the Department prior to the start of work.; Polymer Modified Asphalt Crack Sealant with fiber (PMACS) shall be a polymer modified asphaltfiber compound designed specifically for improving the strength and performance of the parent asphalt used in the sealant.; The asphalt binder shall consist of a blend of neat asphalt binder, crumb rubber, and SBS polymer and meet the following specifications: • Modification at a minimum shall consist 7% crumb rubber and 3-4% SBS polymer. The maximum particle size for the crumb rubber shall be 80 mesh; • The performance grade of the base asphalt binder prior to modification shall be a PG 58-28; • OB DSR (AASHTO T315) @ 76: Min 1.00 kPa; • MSCR (AASHTO T350) @ 64 JnR3.2 < 0.50; The polymer modified asphalt-fiber compound shall be thoroughly mixed for a minimum of one hour at the required temperature range of 320°F to 375°F before application can begin. To ensure a uniform fiber distribution in the sealant, and also to limit fluctuations in the application temperature of the blended material, the contractor must have a full tanker of sealant mixed, heated to the proper application temperature, and ready for testing at the start of each work day. Once that batch of sealant is emptied from the tanker, crack sealing operations will cease for the remainder of the day. No new materials will be allowed to be added to the tanker during the workday under any circumstances. Bulk tankers shall be filled at the approved asphalt supplier’s facility, and accompanied by the a bill of lading and material data sheet.
