以内蒙古天然浮石作为粗骨料,通过冻融核磁共振技术模拟冻融循环温度变化过程,并测得天然浮石混凝土在冷冻和融化过程中孔溶液信号量、结冰速率、T2谱和孔径分布的变化规律,结果表明:用冷冻过程中的含冰量来评价孔溶液结冰引起的静水压比较符合实际情况;天然浮石混凝土发生冻害的温度主要是-15℃以上.探讨了天然浮石混凝土孔溶液的结冰规律.
The freezing and thawing temperature cycle of coarse aggregate,which was made from the natural pumice in Inner Mongolia,was simulated by freezing-thawing nuclear magnetic resonance technology.During the freezing and thawing process,the various discipline of pore solution semaphore,frozen rate,T2 spectrum and pore size distribution were obtained.The results showed that it was reasonable to evaluate the hydrostatic pressure of pore solution with the amount of ice in freezing process.The most serious damage of natural pumice concrete occurred at minus 15 centigrade.Other freezing behaviors of the natural pumice concrete solution were also obtained.
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