含气量对不同矿物掺和料C30混凝土耐久性的试验研究

通过美国电量法、干湿循环腐蚀法等分析了引气剂对不同矿物掺和料的C30混凝土的抗氯离子渗透性、抗盐类腐蚀性等耐久性的影响规律。从抗氯离子渗透性来看,适当引气时效果较好。在所设计的腐蚀条件下,掺和料相同时,适当引气可以提高混凝土的抗腐蚀性,含气量较多则对混凝土抗腐蚀性不利;各类不同掺量的C30混凝土在实际含气量为3%左右时抗腐蚀性能最好。

Experiment and Study of Air Content on Durability of C30 Concrete with Different Mineral Admixtures

The article analyzes the influence law of air entraining agent on the durability of resistance to chloride ion permeability and resistance to salts corrosion of C30 concrete with the different mineral admixtures by the U.S.A coulometry method and the dry-wet cycle etched method.Based on the resistance to chloride ion permeability,the effect is better during the suitable air entraining.Under the designed corrupting condition and with the same admixture,the suitable air entraining can improve the resistance to corrosion of concrete,and more air content is unfavorable for the resistance to corrosion of concrete.The resistance to corrosion of concrete of C30 concrete with the different admixtures is the best when the practical air content is about 3%.