| 摘要 |
<p>PURPOSE: To convert an industrial waste into a useful hardened material by adding one or more materials selected from slaked lime, ready-mixed concrete residue, light-burned dolomite and hydraulic cement to chips of Oya-ishi (a kind of pumice-tuff depositing in Tochigi Prefecture, Japan) and hardening the mixture. CONSTITUTION: The objective hardened material made of chips of Oya-ishi is produced by mixing chips of Oya-ishi with one or more materials selected from slaked lime, ready-mixed concrete residue, light-burned dolomite and hydraulic cement in an amount of 5-10% based on the Oya-ishi, optionally adding fly ash and/or blast furnace slag and hardening the mixture.</p> |
