Influence of sodium gluconate on the performance and hydration of Portland cement
Influence of sodium gluconate on the performance and hydration of Portland cement
复制标题
葡萄糖酸钠对硅酸盐水泥性能及水化的影响
DOI：
10.1016/j.conbuildmat.2015.05.068
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发表时间：
2015-08-30
影响因子：
7.4
通讯作者：
Shen, Xiaodong
中科院分区：
文献类型：
--
作者：
Ma, Suhua;Li, Weifeng;Shen, Xiaodong
葡萄糖酸钠通常用于延缓水泥和混凝土的凝结。研究了葡萄糖酸钠对硅酸盐水泥物理性能和结构的影响。葡萄糖酸钠提高了3天和28天的抗压强度，延缓了水泥凝结，增加了波特兰水泥砂浆的流动性。低于0.03%的葡萄糖酸钠促进了早期钙矾石（AFt）的形成。1.0%葡萄糖酸钠显著抑制C(3)A与CaSO4中心点2H(2)O的反应。葡萄糖酸钠延缓了C3S的水化反应，延长了诱导期。葡萄糖酸钠对铁素体水化反应的影响不大。水化程度的降低并没有改善水泥浆体的孔隙分布和孔隙率。(C) 2015 Elsevier Ltd.版权所有。
Sodium gluconate is commonly used to.delay the setting of cement and concrete. This study investigated the effects of sodium gluconate on the physical properties and structure of Portland cement. Sodium gluconate improved the compressive strength at 3 and 28 days, delayed cement setting and increased the fluidity of the Portland cement mortar. Less than 0.03% sodium gluconate promoted the formation of ettringite (AFt) at early age. A dosage of 1.0% sodium gluconate significantly inhibited the reaction between C(3)A and CaSO4 center dot 2H(2)O. Sodium gluconate delayed the hydration reaction of C3S, which increased the duration of the induction period. Sodium gluconate had only a slight effect on the hydration reaction of the ferrite phase. The pore distribution and porosity of the cement paste were not improved due to the decrease in hydration. (C) 2015 Elsevier Ltd. All rights reserved.