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基于长期浸泡与干湿循环制度下膨胀历程的相似性,对水泥基材料在硫酸盐-氯盐复合侵蚀下的等效加速评价进行了研究。结果表明,干湿循环制度宜作为评价硫酸盐-氯盐复合侵蚀下的加速评价方法;干湿循环的加速作用随着试件水灰比的增大而增强,且砂浆试件中的加速作用相对较弱;复合盐溶液中氯盐的存在削弱了干湿循环对硫酸盐侵蚀的加速作用,其削弱程度与试件的水灰比、试件的类型有关,其中试件类型的影响更为显著。
Based on the similarity of swelling history under long-term immersion and wet-dry cycles, the equivalent accelerated evaluation of cement-based materials under sulfate-chloride salt combined erosion was studied. The results show that the wet-dry cycle system should be used as an accelerated evaluation method to assess the sulfate-chloride salt complex erosion. The acceleration of wet-dry cycle increases with the increase of water-cement ratio, and the acceleration in mortar samples And the relative weakness. The presence of chloride in the composite salt solution weakened the accelerating effect of the wet-dry cycle on the sulfate attack. The degree of weakening was related to the water-cement ratio of the sample and the type of the sample, and the type of the sample was more affected Significant.