硅灰掺量对混凝土氯离子结合能力的影响

Influences of Silicon Fume Content on Chloride Ion Binding Capacity of Concrete

用等温吸附法测定了混凝土在系列氯化钠(NaCl)溶液中的平衡氯离子(Cl-)浓度,计算了硅灰混凝土对Cl-的总结合能力、化学结合能力以及物理结合能力,研究了硅灰掺量对混凝土Cl-结合能力影响的规律。结果表明:在水灰比与胶凝材料总量不变的条件下,随着硅灰的掺量逐渐增加,混凝土的氯离子总结合能力,化学结合能力以及物理结合能力的变化趋势都是线性降低的。

Chloride ion（ Cl-） equilibrium concentrations of concrete exposed to sodium chloride（ NaCl）solutions with different concentrations were determined by the isothermal adsorption method. For silicon fume concrete,the total Cl-binding capacity,chemical binding capacity and physical adsorption capacity were calculated,and the influence of silicon fume content on the Cl-binding capacity of concrete was investigated. The result show that for silicon fume concrete with constant water-to-bound ratio and binder content,as the silicon fume content is increased,both the total Cl-binding capacity,chemical binding capacity and the physical adsorption capacity decrease linearly.