It was made for many years until it was found to be deadly, around the seventies. There is still plenty in situ. and great care must be used in handling it.
Older cement board may contain asbestos, and then it is properly called "asbestos cement board." Cement board more recently manufactured should not contain asbestos. The only way to know whether a particular cement board does or does not contain asbestos is to ask the manufacturer (if you know who made it) or have a sample collected from it by a qualified sampling technician and have the sample analyzed by a qualified laboratory.
Asbestos cement
Some fibrous cement board contains asbestos and some does not. It depends on when and where it was manufactured. The only way to be certain is to have it tested by a qualified laboratory.
Asbestos-cement wallboard looks like any other cement board product. Only analysis by a qualified lab can tell the difference.
Asbestos-cement wallboard looks like any other cement board product. Only analysis by a qualified lab can tell the difference.
If it is a product of James Hardie, no. It is primarily a Portland Cement and cellulose product.
Asbestos cement
Asbestos pipe is made of cement that contains asbestos fibers. Iron pipe is made from cast iron.
Fibre reinforced cement board is a better descriptor. Asbestos has a bad press recently, but glass fibres are an adequate substitute provided one uses an alkali resistant glass.
The difference between corrugated asbestos roofing and flat asbestos cement sheet is the form in which it was cast and, perhaps, the thickness of the finished product. Asbestos was merely an additive to cement. Both products are basically cement with a fiber strengthener that happens to be asbestos.
generalist
Asbestos is a good insulator Asbestos-cement sheets 0.166 W/m.K and that of steel is 43 W/m.K Asbestos cement stands up well to weathering.