动弹性模量在混凝土抗侵蚀性能评价中的应用

Evaluation of Resistance of Concrete to Sulfate Attack by Dynamic Elastic Modulus

用力学指标评价混凝土抗侵蚀性能具有破坏性和测值离散的特点,采用混凝土试件在饱和硫酸钠溶液中浸泡和干湿循环的相对动弹性模量的测试结果与混凝土力学破坏试验结果比较的方法,探讨了相对动弹性模量测试等非破损方法在评价混凝土抗硫酸盐盐结晶侵蚀性能的可行性和有效性．结果表明,相对动弹性模量表征的抗盐结晶侵蚀系数与相对抗折强度及劈拉强度表征的抗盐结晶侵蚀系数评价指标具有较好的相似性．以相对动弹性模量测试的非破损方法辅助一定数量的力学测试可以用于评价混凝土的抗侵蚀性能．图6,表2,参8．

It＇s inefficiency and time consumption to evaluate the concrete＇s durability for the destructive and discrete data of mechanic method. The feasibility and availability were studied by comparing the static tests and the effects of relative stir-elastic-module that the concrete in long-term immersion and drying and wetting cycle in saturated sodium sulfate solution. The results indicate that the stir-elastic-module has a good consistency with static parameters, such as splitting strength and flexural strength on appraising the degrading of concrete in sulfate environment;Non-destructive methods can be applied in the research of concrete＇s durability besides of some static tests.6figs., 2tabs., 8refs.