Studies on the industrial application of "shirasu" (Report 5) : on the lightweight autoclaved bodies using "shirasu"

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  • シラスの工業的利用に関する研究 (第5報) : シラス―石灰―フライアッシュ系, 発泡オートクレーブ硬化体
  • シラス-石灰-フライアッシュ系発泡オートクレーブ硬化体
  • シラス-セッカイ-フライアッシュケイ ハッポウ オートクレーブ コウカタイ

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Abstract

Shirasu is distributed chiefly in south Kyushu and consists of volcanic ash, pumice and other materials. Shirasu, slaked lime and fly ash were used as raw materials of the porous lightweight autoclaved bodies. The porous lightweight autoclaved bodies were prepared as follow; mixing ratio of shirasu:slaked lime:fly ash =0.7~1.5:1:0~0.5, mixing water(added small amount of NaOH, Al(H_2PO_4)_3 etc.) 65%. Al powder 0.15~0.20%, curing pressure 10kg/cm^2 curing time 8hrs. Results are as follow; bulk density 0.60~0.72, water absorption 48~95%, compressive strength 3.2~22.7kg/cm^2, bending strength 1.5~10.4kg/cm^2.

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