Abstract
Author showed the theory that Asbestos-cement Board's Strength relatived the product of function with density, young's modulus, Asbestos' specific surface area by hydrated cement's strain. And author discussed these factor to Autclaved and Atomosphere cured Asbestos-cement Boards which contained fine silicarous aggregate or not. a. At atomosphere curing (non-silica), actual value of Asbestos ratio that get maximum strength were over than theoretical value. b. At autclave curing (non-silica), Asbestos ratio was the same as above, but absolute value of strength was small. The poor Asbestos ratio and the higher curing temperature made strength lower at long age. c. At atmosphere curing (non-silica), physical properties were influenced by making pressure, but at autclaving (non-silica) small. d. Autclaving without silica made worng to Asbestos, but autclaving with silica made not worng to Asbestos for low base. e. In spite of curing method, the Asbestos' effect influencing strength were showed by the product of Asbestos' fiber content by Asbestos' specific surface area. f. Asbestos-cement boards' creep and strain were relatived hydrated cement's structure and Asbestos ratio. The result were following table. [table]
