Bitumen is hydrophobic material, it impermeable, almost insoluble in water, dilute ethanol, acetone, ether, soluble in carbon disulfide, carbon tetrachloride, sodium hydroxide. Health hazard: medium toxicity. Asphalt and flue gas of skin mucous membrane irritation, has the light effect and the effect that cause cancer. China's three major asphalt toxicity: coal tar > > oil shale asphalt asphalt, before both have carcinogenicity. The main skin lesions are: asphalt light contact dermatitis, skin confined to the face, neck and other exposed parts; Melanosis, skin lesions often symmetrical distributed in the exposed parts, plate shaped, brown - deep brown - brown-black; Occupational acne; Verrucous vegetations and the accident cause thermal burns. In addition, there are dizziness, head bilges, headache, chest tightness, fatigue, nausea, loss of appetite and other systemic symptom and eye, nose, pharynx and irritation.
Application: in civil engineering, bitumen is waterproof materials and widely used anticorrosion material, mainly used in roofing, ground, underground waterproof structure, wood, steel corrosion. Or road asphalt pavement cementing materials applied widely in engineering, and it has to do with different composition of mineral materials in proportion with different structure of asphalt pavement can be built.
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