HYDRAULIC COMPOSITION AND PRODUCTION OF INORGANIC MATERIAL MOLDED ARTICLE

摘要

PROBLEM TO BE SOLVED: To obtain a hydraulic composition capable of obtaining an inorganic material molded article excellent in bending strength, nailing property and frost resistance compared to the conventional ones and to provide a producing method of the same using the hydraulic compound. SOLUTION: The hydraulic composition contains 0.05-15 pts.wt. vinyl alcohol based polymer having >=0.1 mJ/mg endothermic peak at a temp. between 100 deg.C and the polymer crystal melting peak in the differential scanning calorie measurement under a nitrogen atmosphere per 100 pts.wt. composition consisting of calcareous powder and silica powder. The producing method of the inorganic material molded article comprises aging the hydraulic compound at 40-100 deg.C under steam of atmospheric pressure or at 100-200 deg.C under the pressurized steam.