冻融与碳化交替作用下的混凝土性能试验

摘要

In order to investigate the concrete durability under combined freeze-thaw and carbonation actions, concrete tests withrndifferent water-cement ratios and fly ash contents were performed under the alternate freeze-thaw and carbonation actions. Thernresults show that the carbonation depth under the alternate actions does not follow a square-root-of-time trend, but increases fasterrnwith alternate times. With the increase of the free-thaw percentage, the concrete is damaged faster and its carbonation is morernsignificant.%为了研究冻融与碳化同时作用下混凝土的耐久性,采用冻融和碳化交替作用的方法对不同水胶比、不同粉煤灰掺量的混凝土进行抗冻性能和抗碳化性能试验.试验结果表明:冻融与碳化交替作用下混凝土碳化深度不再服从时间的二次方根的发展趋势,而是随着交替次数的增加发展得更快；冻融作用所占比例越大,混凝土损伤越快,碳化也越严重.