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Asbestos as a building material
- 2. ASBESTOS Asbestos is a naturally occurring mineral composed of soft and flexible fibers that are resistant to heat, electricity and corrosion. These qualities make the mineral useful, but they also make asbestos highly toxic. Asbestos is an effective insulator, and it can be used in cloth, paper, cement, plastic and other materials to make them stronger.
- 3. Actinolite Asbestos Actinolite asbestos is typically dark brown with sharp needle- like fibers. Actinolite is also made up of other minerals, including calcium, magnesium, iron and silicon. Though this type of asbestos is rare, the following products have contained actinolite asbestos: • Cement • Insulation • Paint • Sealants • Drywall
- 4. Amosite asbestos, or “brown asbestos,” has sharp, brittle and needle-like fibers. Amosite is particularly resistant to heat and flame. As a result, amosite is common in construction materials for fireproofing. Amosite Asbestos The following products have contained amosite asbestos: •Cement sheets •Thermal insulation •Fireproof products •Chemical insulation •Electrical insulation •Pipe insulation •Insulation boards
- 5. Anthophyllite asbestos is brown or yellow with long, needle-like fibers. Anthophyllite commonly contains magnesium and iron. Anthophyllite is one of the rarest types of asbestos and not commonly used in commercial goods. The fibers have been found in cement and insulation materials on rare occasions. Anthophyllite Asbestos
- 6. Chrysotile asbestos, or “white asbestos,” has long, curly fibers that wrap around themselves. The fibers weave easily together into fabric. Chrysotile asbestos was frequently incorporated into construction materials and automotive parts. Navy ships often contained insulation made with chrysotile asbestos. The mineral was ideal because it was lightweight and incombustible. Chrysotile Asbestos The following products have contained chrysotile asbestos: •Cement •Roofing materials •Plastics •Rubber •Asphalt
- 7. Crocidolite Asbestos Crocidolite, or “blue asbestos,” has very fine, sharp fibers. Due to the small size and brittle nature of crocidolite fibers, they are particularly easy to inhale. Crocidolite asbestos is not as heat resistant as other asbestos types. As a result, it was rarely incorporated into commercial goods.
- 8. Tremolite asbestos ranges from a milky white to dark green color. Tremolite has straight, sharp fibers and is predominantly composed of magnesium. Tremolite Asbestos The following products have contained tremolite asbestos: •Plumbing materials •Paint •Sealants •Insulation •Roofing
- 10. Properties of Asbestos • Very strong • Highly flexible • Non-biodegradable • Environmentally persistent • Asbestos is very resistant to heat and burning • Good resistance to acids and alkalies, • Excellent resistance against chemicals.
- 11. Properties of Asbestos • It does not deteriorate in normal usage, • It is not attacked by insects or microorganisms. • It is used in fireproof clothing, conveyor belts, • It is used in brake linings, gaskets, industrial packing, electrical windings, • Good insulations properties • Good soundproofing properties.
- 12. Health Effects Because it is so hard to destroy asbestos fibers, the body cannot break them down or remove them once they are lodged in lung or body tissues. They remain in place where they can cause disease. There are three primary diseases associated with asbestos exposure: •Asbestosis Asbestosis is a serious, chronic, non-cancerous respiratory disease. •Lung Cancer Lung cancer causes the largest number of deaths related to asbestos exposure. •Mesothelioma Mesothelioma is a rare form of cancer that most often occurs in the thin membrane lining of the lungs, chest, abdomen, and (rarely) heart.
- 13. Asbestos Building Materials •Insulation Sheet •Floor tiles •Ceiling tiles •Drywall •Adhesives •Plumbing Material •Roofing • Use with Asphalt •Cement Sheets •Asbestos Sheets
- 14. •Drywall•Floor Tiles/Vinyl Tiles Asbestos Building Materials
- 15. •Insulation Sheet Ceilling Sheet Asbestos Building Materials
- 16. •Adhesives•Plumbing Pipes Asbestos Building Materials
- 17. •Roofing •Use with Asphalt Asbestos Building Materials
- 18. •Cement Sheets Asbestos Sheets Asbestos Building Materials