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研究了不同矿物掺合料掺量对水泥基材料孔溶液中氯离子浓聚系数的影响。结果表明:随着矿物掺合料掺量的增加,氯离子浓聚系数降低。在NaCl溶液中浸泡91 d后,除了矿粉取代量为20%的试件,其它掺入矿物掺合料硬化浆体试件的氯离子浓聚系数均低于纯硅酸盐水泥试件。随浸泡液NaCl浓度增大,氯离子浓聚系数显著降低。氯离子吸附能力与硬化水泥浆体内水化产物的特性和数量、Ca(OH)_2含量和孔结构有关。
The effects of different mineral admixtures on the concentration of chloride ion in cement-based materials were investigated. The results show that with the increase of mineral admixture, the concentration of chloride ion decreases. After soaking for 91 d in NaCl solution, the concentration of chloride ions in other hardened slurry samples blended with mineral admixture was lower than that of pure Portland cement sample, except that the substitution amount of slag was 20%. With the increase of NaCl concentration, the concentration of chloride ion decreased significantly. The adsorption capacity of chloride ions is related to the characteristics and quantity of hydration products, Ca (OH) _2 content and pore structure in hardened cement paste.