氯离子对无机聚合物和硅酸盐水泥水化特性和硬化浆体性能的影响

发布时间：2018-05-10 20:07

本文选题：无机聚合物 + 力学性能　；参考：《混凝土》2017年05期

【摘要】：研究了内掺氯离子对无机聚合物和硅酸盐水泥基本性能的影响,以及其硬化浆体对氯离子的固化特性及机理分析。结果表明:氯离子引入对无机聚合物及硅酸盐水泥的标准稠度用水量影响不大,对无机聚合物有缓凝作用,对硅酸盐水泥有促凝作用;氯离子对无机聚合物胶砂的抗压强度影响不明显,能提高硅酸盐水泥胶砂的早期抗压强度,但都能降低两种胶凝材料的抗折强度;内掺氯离子不改变无机聚合物和硅酸盐水泥的水化特性,但会改变放热峰的峰值及出峰时间;当水胶比一定时,无机聚合物与硅酸盐水泥硬化浆体对氯离子的固化能力总体的变化趋势表现为随龄期的增加而提高,随NaCl掺量的增加而下降,无机聚合物对氯离子的固化率低于硅酸盐水泥硬化浆体的原因是没有形成Friedel′s盐,仅仅由水化形成的C-S-H凝胶吸附氯离子。
[Abstract]:The effect of chloride ion on the basic properties of inorganic polymer and Portland cement was studied, and the solidification characteristics and mechanism of the hardened paste to chloride ion were analyzed. The results showed that the introduction of chloride ion had little effect on the standard consistency water consumption of inorganic polymer and Portland cement, but had retarding effect on inorganic polymer and promoting effect on Portland cement. The effect of chloride ion on the compressive strength of inorganic polymer cement sand is not obvious. It can improve the early compressive strength of silicate cement sand, but both can reduce the flexural strength of two kinds of cementing materials. The hydration characteristics of inorganic polymer and Portland cement are not changed by the addition of chloride ion, but the peak value and the peak time of exothermic peak are changed, when the water-binder ratio is fixed, The curing ability of inorganic polymer and Portland cement hardened paste to chloride ion increased with the increase of age, and decreased with the increase of NaCl content. The reason why the curing rate of inorganic polymer to chloride ion is lower than that of Portland cement hardened paste is that no Friedel's salt is formed, and only C-S-H gel formed by hydration is used to adsorb chloride ion.
【作者单位】：广州大学土木工程学院;广东省水利水电科学研究院;广东省水利重点科研基地;
【基金】：广东省水利科技创新项目(2015-10) 中国博士后科学基金(2016M590776)
【分类号】：TQ172.1

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