Slow-curing asphalt

Chemical Designations - Synonyms Liquid asphalt Petroleum asphalt Slow-curing asphalt Chemical Formula Not applicable. 

Silicochloroform Silicolluoric Acid Silicon Chloride Silicone Fluids Silicon Tetrachloride Silver Acetate Silver Carbonate Silver Fluoride Silver Iodate Silver Monofluoride Silver Nitrate Silver Oxide Silver Sulfate Silvisar 510 Slaked Lime Slow-Curing Asphalt Sodamide Sodium... 

OILS, MISCELLANEOUS ROAD Liquid asphalt, Petroleum asphalt, Slow curing asphalt NL 0 1 0 ... 

There are two main hazards associated with asphalt Fire and explosion hazards and health hazards associated with skin contact, eye contact, and/or inhalation of fumes and vapors. Most of the fire and explosion hazards associated with asphalt come from the vapors of the solvent mixed into the asphalt, not the asphalt itself The hazard is determined by the flammable or explosive nature of the solvent used and how fast it evaporates. The flash point (FP) of the asphalt and solvent mix will be higher than the FP of the solvent alone. Asphalt is combustible, typically with a FP of 204-288°C (400-550°F).The flash point—and therefore, the fire or explosion hazard— can be determined, in part, by the type of asphalt used.There are three types of cut asphalts. Rapid-curing asphalt (RC) is blended asphalt that has been cut with a low-flash (highly flammable) petroleum solvent. This low-flash solvent quickly evaporates, allowing the RC mixture to rapidly set and harden. Examples of solvents commonly used in RC mixtures include Benzene (FP=-11°C (12°F)), Dioxin (FP=27-32°C (81-90- F)), Naphtha (FP=42°C (107°F)),Toluene (FP=4°C (40°F)), and Xylene (FP=27-32°C (80-90°F)). Medium-curing asphalt (MC) is blended asphalt that has been cut with a solvent with a flash point over 170°F. Slow-curing asphalt (SC) is blended asphalt that has been cut with a low-flash oil having a flash point of over 12 PC (250 F). 

Cutback asphalts are mixtures in which hard asphalt has been diluted with a lighter oil to permit application as a liquid without drastic heating. They are classified as rapid, medium, and slow curing, depending on the volatility of the diluent, which governs the rate of evaporation and consequent hardening. 

ASTM D 2026/D 2026M-97el. 2010. Standard specification for cutback asphalt (slow-curing type). West Conshohocken, PA ASTM International. 

Neoprene 12% Bitumen/asphalt compatible good water resistance good adhesion to metals low cost High shrinkage only dark color very slow curing stains wood/ stone... 

Emulsified asphalt used as a protective coating is specified by ASTM D1227 (10). These emulsions ate appHed above freezing by bmsh, mop, or spray, and bond to either damp or dry surfaces. Such appHcation is not recommended for inclines <4° to avoid the accumulation of water. However, curing by water evaporation can be slow, and these emulsions may remain water-susceptible. 

---