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.
参考文献
| [1] | Zhang Chengzhi .Evaluation of the Alkali-Reactivity of Aggregate and Evaluation of the Effectiveness Inhibiting of Mineral Admixture on Alkali-Aggregate Reaction[D].南京:南京化工大学,1996. |
| [2] | Tang Mingshu;Ye Yufeng;Yuan Meiqi et al.The Preventive Effect of Mineral Admixtures on Alkali-Silica Reaction and Its Mechanism[J].Cement and Concrete Research,1983,13(02):171-176. |
| [3] | Tang Mingshu .Some Theoretical Problems of Alkali-Aggregate Reaction[J].Journal of The Chinese Ceramic Society,1990,18(04):365-373. |
| [4] | F G Buttler;S R Morgan;E J Walk.Studies on the Rate and Extent of Reaction between Calcium Hydroxide and Pulverized-Fuel Ash at 38℃[A].Cope Town,1981:S25-28. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%