矿物掺合料对混凝土中氯离子传输规律影响的试验研究

Study on Impact of Mineral Addition to Transmission Regularity of Chloride Ion in Concrete

通过毛细吸盐试验,研究试件在毛细吸收作用下,粉煤灰、矿粉等矿物掺合料及其掺入量对混凝土中氯离子传输规律的影响。试验结果表明,保持水胶比不变,向混凝土中掺入一定比例的粉煤灰和矿粉(等量替代原混凝土中水泥质量)可以有效地提高试件的抗氯离子侵入性能,当粉煤灰掺入量为30%、矿粉掺入量为50%时混凝土具有较好的抗氯离子侵蚀性能。

Capillary suction salt test are conducted to evaluate the impacts of such additions as fly-ash and mineral powder as well as their mixing ratio to the transmission regularity of chloride ion in the concrete specimen. The result shows that if the water binder ratio is fixec, mixing certain proportions of fly-ash and mineral powder in the concrete （which quantities shall be equal with cement quantity in original concrete） can effectively improve resistance of corrosion chloride ion. The concrete will have better resistance when the content of fly-ash reaches 30 percent and the mineral powder content reaches 50 percent.