1) 不焼セメントの性質並に利用に關する研究

概要

論文の詳細を見る
The principal material of this cement is waste product that are produced when quarrying Oya-ishi (a kind of Tuff), and the cement is made by mixing the suitable amount of slaked lime and a small amount of plaster. The waste of Oya-ishi-i, e, the material-si better when it is shiro-me, the well weathered matter of Ao-me, or the calcined matter of Ao-me at 500℃ there about, It is because these matters are rich in soluble SiO_2 component. Again, these chips of stone may be pulverized as fine as posible, andit is desirable to have the similar degree of fineness as portland cement. As the effect of curing method of mortar and concrete made of this cement appears sharply on these strength, we should keep it in water or high humidity, and keep high temperature as long as posible. When this cement is properly made, it shows, according to the testing method shown in JIS, A, 5210, to have the compressive strength of 100kg/cm^2 or more, even if the water-cement ratio is 70% by weight. From this fact, we can say this is a better material than the other non-calcined lime-silicate cement. Though, it is difficult to make a roofing-tile using this cement mortar, but it is possible to mak ea block of higher strength by pressed moulking process.
社団法人日本建築学会の論文
1951-02-20