| abstract |
[PROBLEMS] To provide a cement-based inorganic board having an excellent fire resistance, having a small heat shrinkage rate and sufficiently reducing cracks and warpage caused when heated when used for a structure such as an outer wall, a roof, or an eaves ceiling. . A cement-based inorganic board according to the present invention comprises 20-50% by mass of cementitious material, 20-60% by mass of siliceous material, and 7-40% of calcareous material having a median diameter of 0.1-40 μm. %, 2 to 10% by mass of the reinforcing fiber material, and 1 to 13% by mass of an additive that suppresses thermal shrinkage. [Selection figure] None |