| 摘要 |
PROBLEM TO BE SOLVED: To obtain a cement-based molded product excellent in mechanical strength and having suppressed adhesion under curing in an autoclave. SOLUTION: This cement-based molded product according to an extrusion molding method comprises a polyvinyl alcohol-based polymer having >=25% dissolution ratio in a cement slurry at 40 deg.C, especially a polyvinyl alcohol-based polymer having >=25% dissolution ratio in the cement slurry at 40 deg.C and 50-2,000, especially 50-1,100 degree of polymerization or a silyl group-modified polyvinyl alcohol-based polymer having >=25% dissolution ratio in the cement slurry at 40 deg.C. |
