Asbestos Definition And Overview
Asbestos Def
Asbestos refers to a group of naturally occurring silicate minerals known for their heat resistance, strength, and insulating properties. The term 'asbestos' comes from the Greek word meaning 'inextinguishable' or 'unquenchable,' reflecting its fire-resistant qualities. These minerals have been used for thousands of years in various applications.
Types of Asbestos
There are six recognized types of asbestos minerals, divided into two categories: serpentine and amphibole. Chrysotile, the only serpentine asbestos, accounts for about 90-95% of all asbestos used historically. Amphibole asbestos includes amosite, crocidolite, tremolite, anthophyllite, and actinolite. All forms are hazardous to human health.
Asbestos fibers are microscopic and can become airborne when disturbed. Their durability means they persist in the environment and human body once inhaled. This persistence contributes to their toxicity and ability to cause diseases decades after exposure.
Historical Uses
Throughout the 20th century, asbestos was incorporated into thousands of products including insulation, roofing materials, floor tiles, and automotive parts. Its widespread use stemmed from its excellent thermal insulation, chemical resistance, and affordability. Many older buildings still contain asbestos-containing materials.
The discovery of asbestos-related health risks led to strict regulations and reduced usage beginning in the 1970s. However, complete bans have not been implemented worldwide, and asbestos continues to be used in some countries and specific applications.
Understanding asbestos definition and properties is crucial for identifying potential hazards in older structures and ensuring proper safety measures are followed during renovation or demolition projects.