硫酸盐环境与水灰比对混凝土氯离子结合能力的影响

摘要

It adopted the natural diffusion method determination of total chlorine ion in the concrete and the free chloride ion concentra-tion to calculate the binding ability of chloride ion in various concentration of sulfate.On this way ,to study the impacts of sulfate concen tration and water-cement ratio on chloride binding capacity R.Research indicated that with the increase of sulfate concentration ,the concrete to chloride ion binding capacity will be reduced accordingly and this trend presented power function;while salt solution was con-stant,the higher of W/C,the higher of chloride binding capacity was.%采用自然扩散法测定了混凝土中的总氯离子和自由氯离子浓度，计算了不同硫酸盐浓度下各混凝土氯离子结合能力，研究了硫酸盐浓度、水灰比对混凝土氯离子结合能力R的影响。结果表明：随硫酸盐浓度的增大，混凝土对氯离子结合能力会相应的减小，且与下降的趋势呈乘幂函数的关系；在相同盐溶液侵蚀环境下，混凝土水灰比的提高，使混凝土氯离子结合能力R也得到了提高。