混凝土自愈的试验研究

Experimental studies of self-recovery of concrete

以混凝土自愈性为研究内容,用不同种类混凝土的动弹性模量指标的变化率来表征养护过程中混凝土的性能恢复状况,并系统比较了不同种类混凝土的抗冻融性优劣,通过研究得出,适当的掺杂粉煤灰和引气剂可以提高混凝土自愈性,指出要注重非冻融季节对混凝土建筑物的养护,这对提高其抗冻融耐久性有重要意义。

The paper deals with the self-recovery of concrete, describing the recovery property in freezing and thawing of different kinds of concrete with their change rate of such index as dynamic modulus of elastic, and then systemically comparing their performance of frost resistance. Experimental results showed that the recovery of concrete can be improved through mixing appropriate coal ash or air entraining agent, and it is pointed out that there is necessary to care for curing of concrete structure in unfreezing season, that has the important meaning for inhancing the durability on resistance to freezing and thawing.