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On the base of the influence rule of silica fume,slag and fly ash on alkali-silica reaction under the condition of 70℃,the mechanism of the effect of mineral admixtures on alkali-silica reaction is studied further in the paper.The results show that the effects of mineral admixtures on alkali-silica reaction are mainly chemistry effect and surface physichemistry effect.Under suitable condition,the chemistry effect may make alkali-silica reaction to be inhibited effectively,but the physichemistry effect only make alkali-silica reaction to be delayed.The chemistry effect and the physichemistry effect of minerals admixture are relative to the content of Ca(OH) 2 in system.Under the condition that there is a large quantity of Ca(OH) 2 ,mineral admixture cannot inhibit alkali-silica reaction effectively.Only when Ca(OH) 2 in the system is very less,it is possible that mineral admixture inhibits alkali-silica reaction effectively.
On the base of the influence rule of silica fume, slag and fly ash on alkali-silica reaction under the condition of 70 ° C, the mechanism of the effect of mineral admixtures on alkali-silica reaction is studied further in the paper.The results show that the effects of mineral admixtures on alkali-silica reaction are mainly chemistry effect and surface physichemistry effect .Under suitable condition, the chemistry effect may make alkali-silica reaction to be cured effectively, but the physichemistry effect only make alkali-silica reaction to be delayed. The chemistry effect and the physichemistry effect of minerals admixture are relative to the content of Ca (OH) 2 in system. Undertaking the condition that there is a large quantity of Ca (OH) 2, mineral admixture can not inhibit alkali-silica reaction effectively.Only when Ca (OH) 2 in the system is very less, it is possible that mineral admixture inhibits alkali-silica reaction effectively.