シラスの工業的利用に関する研究 (第2報) : シラスおよびフライアッシュを用いたオートクレーブ硬化体

概要

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"Shirasu", is distributed chiefly in southern Kyushu and consists of volcanic ash, pumice and other materials. Shirasu, fly ash and slaked lime were used as raw materials as autoclave-hardened bodies. The press molded and then autoclaved bodies were prepared as follow; mixing ratio of slaked lime:shirasu:fly ash=1:0.85:0.15, 1:2.55:0.45, 1:5.1:0.9, mixing water (added 0-2.25% Al(H_2PO_4)_3 of all raw materials) 15%, press-molding pressure 200kg/cm^2, curing pressure 5-15kg/cm^2, curing time 5-15 hours. Results are as follow; apparent density 1.80-1.92, bulk density 1.44-1.68, water absorption 12.5-29.0%, compressive strength 108-577kg/cm^2. From the point of economic view, the best steam-curing conditions of the press molded and then autoclaved bodies are as follow; mixing ratio of slaked lime:shirasu:fly ash=1:3, mixing water 15%, addition of aluminium phosphate to mixing water 0.075%, curing pressure 10kg/cm^2, curing time 10 hours.
1967-03-15