ACGIH TLV: TWA 0.5 mg/m3; Not Classifiable as a Human Carcinogen
DFG MAK: Confirmed Animal Carcinogen with Unknown Relevance to Humans
NIOSH REL: (Asphalt Fumes) CL 5 mg/m3/15 M
DOT Classification: 3; Label: Flammable Liquid
The Asphalt, with the CAS registry number 8052-42-4, is also known as Petroleum refining residues, asphalts. It belongs to the product categories of Industrial/Fine Chemicals; UVCBs-organic. Its EINECS registry number is 232-490-9. This chemical's classification codes are Mutation data; TSCA UVCB; Tumor data. The primary use of asphalt is in road construction, where it is used as the glue or binder for the aggregate particles. Asphalt is a sticky, black and highly viscous liquid or semi-solid that is present in most crude petroleums and in some natural deposits.
Preparation of Asphalt: Asphalt can be produced in a fixed plant or even in a mobile mixing plant. It is possible to produce up to 800 tons per hour. The average production temperature of hot mix asphalt is between 150 and 190°C, which depends however on the mixture produced.
Uses of Asphalt: Asphalt is a mixture of aggregates, binder and filler, used for constructing and maintaining all kind of roads, parking areas but also play- and sport areas. Although asphalt is mainly used for paving roads, it can also be used for various other purposes. The versatility of asphalt makes it such a widely used material. Asphalt is used to make Japan black, a lacquer known especially for its use on iron and steel. Asphalt also is used in paint and marker inks by some graffiti supply companies (primarily Molotow) to increase the weather resistance and permanence of the paint and/or ink, and to make the color much darker.[citation needed] Asphalt is also used to seal some alkaline batteries during the manufacturing process.
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