| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a cement-based extrusion product which is obtained while securing water retention at the time of extrusion, has excellent dimension stability and resistance to freezing damage and is excellent in workability and durability. SOLUTION: This cement-based extrusion product contains an aggregate, a broad leaf tree-based pulp and mica. The lightweight aggregate in aggregates, which has a water absorption rate of <=100 mass %, is used in an amount of 10 to 20 mass %, and an amorphous raw material in siliceous raw materials is used in an amount of <=10 mass %. Cement and the siliceous material are blended so that the molar ratio of CaO to SiO2 is 0.6 to 1.2. Thereafter, an extrusion auxiliary agent and water are added to the resulting mixture, and the obtained mixture is extruded to obtain the cement-based extrusion product.</p> |
