钙镁复合膨胀剂膨胀效能的试验研究

Experimental Study on the Expansion Efficiency of Calcium Magnesium Composite Expansive

本文研究了不同养护状态下钙镁复合膨胀剂膨胀效能的发展规律。研究结果表明:在水养情况下,钙镁复合膨胀剂膨胀效能发挥彻底,后期有少量持续膨胀,28d限制膨胀率增长幅度约为6d的9.8%;在标养情况下,结束水养后2d限制膨胀率才达到峰值,后期下降;在自养情况下,钙镁膨胀剂膨胀峰值较标养下降65%,但是后期与标养持平。

The development law of expansion efficiency of calcium magnesium composite expansive agent under different curing conditions was studied in this paper. The results show that the expansion efficiency of calcium magnesium compound expansive agent is fully developed under water condition, and there is a small amount of continuous expansion in the later period, 28d limit expansion rate to 9.8% of 6d. 2d restricted inflation peaked after the end of watering and declined later under standard conditions. Under autotrophic condition, the expansion peak value of calcium magnesium expansive agent decreased by 65% compared with that of standard curing, but it remained unchanged in the later period.