| 摘要 |
PURPOSE:To obtain the subject composition useful for measures against carcinogenese and healthy living circumference by blending a specific composition with pulp, mica flake and residual part of binding cement mixture based on a solid content and keep the composition not so as to contain the asbestos. CONSTITUTION:A cement such as portland cement is blended with fine powder of blast furnace slag and silicic raw material and molar ratio of CaO/SiO3 in total components is controlled to 0.7-1.2 to afford the binding cement mixture (A) which is a main binding agent. Then pulp such as waste pulp of 0.5-3wt.% based on solid content of blending raw material is blended with 3-10wt.% mica flake such as white mica having 0.1-2mm diameter, <=2wt.% extrusion assistant, <=3wt.% reinforcing fiber and the component A which is a remainder to afford a cement composition (B). Then the component B is as necessary blended with an aggregate and blended not so as to entirely contain asbestos to provide the cement composition free from asbestos for extrusion forming body. |
