Asbestos

Asbestos is an excellent thermal and electrical insulator, and is highly fire resistant, so for much of the 20th century, it was very commonly used around the world as a building material (particularly for its fire-retardant properties), until its adverse effects on human health were more widely recognized and acknowledged in the 1970s.

For example, according to Tabari, one of the curious items belonging to Khosrow II Parviz, the great Sassanian king (r. 590–628), was a napkin (Persian: منديل) that he cleaned simply by throwing it into fire.

Early attempts at producing asbestos paper and cloth in Italy began in the 1850s but were unsuccessful in creating a market for such products.

[41] In 1871, the Patent Asbestos Manufacturing Company was established in Glasgow, and during the following decades, the Clydebank area became a centre for the nascent industry.

Sir William Edmond Logan was the first to notice the large deposits of chrysotile in the hills in his capacity as head of Geological Survey of Canada.

[41] With the opening of the Quebec Central Railway in 1876, mining entrepreneurs such as Andrew Stuart Johnson established the asbestos industry in the province.

Mining also took off in South Africa from 1893 under the aegis of the British businessman Francis Oates, the director of the De Beers company.

The use of asbestos became increasingly widespread toward the end of the 19th century when its diverse applications included fire-retardant coatings, concrete, bricks, pipes and fireplace cement, heat-, fire-, and acid-resistant gaskets, pipe insulation, ceiling insulation, fireproof drywall, flooring, roofing, lawn furniture, and drywall joint compound.

[48] In Japan, particularly after World War II, asbestos was used in the manufacture of ammonium sulfate for purposes of rice production, sprayed upon the ceilings, iron skeletons, and walls of railroad cars and buildings (during the 1960s), and used for energy efficiency reasons as well.

[citation needed] In the Hampton Roads area, a shipbuilding center, mesothelioma occurrence is seven times the national rate.

[66] Chrysotile is often present in a wide variety of products and materials, including: In the European Union and Australia, it has been banned as a potential health hazard[69] and is no longer used at all.

[71] While mostly chrysotile asbestos fibers were once used in automobile brake pads, shoes, and clutch discs, contaminants of amphiboles were present.

Since approximately the mid-1990s, brake pads, new or replacement, have been manufactured instead with linings made of ceramic, carbon, metallic, and aramid fiber (Twaron or Kevlar—the same material used in bulletproof vests).

[74] The use of asbestos in new construction projects has been banned for health and safety reasons in many developed countries or regions, including the European Union, the United Kingdom, Australia, Hong Kong, Japan, and New Zealand.

[83] As New York City's World Trade Center collapsed following the September 11 attacks, Lower Manhattan was blanketed in a mixture of building debris and combustible materials.

This complex mixture gave rise to the concern that thousands of residents and workers in the area would be exposed to known hazards in the air and dust, such as asbestos, lead, glass fibers, and pulverized concrete.

[85] Inhalation of a mixture of asbestos and other toxicants is thought to be linked to the unusually high death rate from cancer of emergency service workers since the disaster.

[87] Vermiculite contaminated with asbestos from the Libby mine was used as insulation in residential and commercial buildings through Canada and the United States.

[98] However media reports claim that the United States Mine Safety and Health Administration (MSHA) had found asbestos in four talc samples tested in 2000.

Numerous other items have been made containing chrysotile including brake linings, fire barriers in fuseboxes, pipe insulation, floor tiles, residential shingles, and gaskets for high-temperature equipment.

12001-28-4 , commonly known as blue asbestos, is the fibrous form of the amphibole riebeckite, found primarily in southern Africa, but also in Australia and Bolivia.

[125] The US Occupational Safety and Health Administration (OSHA) has standards to protect workers from the hazards of exposure to asbestos in the workplace.

It was finally banned from building products in 1989, though it remained in gaskets and brake linings until 31 December 2003, and cannot be imported, used, or recycled.

[133] The United Services Union, representing workers tasked with modifying electrical meter boxes at residences, stated that workers should refuse to do this work until the boxes have been inspected for asbestos,[134] and the head of the Australian Council of Trade Unions (ACTU) has called on the government to protect its citizens by ridding the country of asbestos by 2030.

The entire town continues to be contaminated and has been disincorporated, allowing local authorities to remove references to Wittenoom from maps and road signs.

On a note it states that after 44 years if there is no replacement technically, economically or financially the law is appealable and will be subject to review.

[148] In 2011, South Korea became the world's sixth country to enact an asbestos harm aid act, which entitles any Korean citizen to free lifetime medical care as well as monthly income from the government if they are diagnosed with an asbestos-related disease.

The Consumer Product Safety Act bans asbestos in artificial fireplace embers and wall patching compounds.

According to one study, among 300 families in Yen Bai, Thanh Hoa, 85% of households use asbestos roofing sheets, but only 5% know about the negative health effects.

[165] A scientific review article from 2011 claimed epidemiology data was inconsistent and concluded that the IARC's decision to downgrade the carcinogenic potential of fiberglass was valid, although this study was funded by a sponsored research contract from the North American Insulation Manufacturer's Association.

Industrial scale asbestos mining began in 1878 in Thetford township , Quebec . By 1895, mining was increasingly mechanized.
Canada's biggest power shovel loading an ore train with asbestos at the Jeffrey Mine, Johns-Manville Co. , Asbestos, Quebec , June 1944
The applications of asbestos multiplied at the end of the 19th century—this is an advertisement for an asbestos-lined clothes iron from 1906
Asbestos fabric
Rockbestos, asbestos covered wire advertisement in Exhibitors Herald , 1926
In Guy's Hospital , London, 1941, nurses arrange asbestos blankets over an electrically heated frame to create a hood over patients to help warm them quickly
Older decorative ceilings, similar to this one, may contain small amounts of white asbestos
1929 newspaper advertisement from Perth, Western Australia , for asbestos sheeting for residential building construction
A laboratory wire gauze made of asbestos, on a tripod over a Teclu burner
Size of asbestos fibers compared to other particles (USEPA, March 1978)
World production of asbestos (metric tons) from 1900 to 2017 with trend line
Left-sided mesothelioma (seen on the right of the image): chest CT
Map of countries that have banned the use of asbestos
Asbestos warning label under EU directive of 1983
Asbestos Products Ltd (Sydney) asbestos cement corrugated roofing for export
Researcher using a fiber length classifier to produce length-selected fibers of asbestos for toxological studies
Corrugated asbestos roof (with Fibre cement )