Process and Technology to Making Fiber Cement Non
Asbestos fiber semen technology About 120 years ago Ludwig Hatschek made the first asbestos reinforced cement products using a papermaking sieve cylinder machine on which a very dilute slurry of asbestos fibers up to about 10 by weight of solids and ordinary Portland cement about 90 or more was dewatered in films of about 0 3 mm which were then wound up to a desired thickness