Effect of sodium silicate- and ethyl silicate-based nano-silica on pore structure of cement composites
Effect of sodium silicate- and ethyl silicate-based nano-silica on pore structure of cement composites
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DOI：
10.1016/j.cemconcomp.2013.12.009
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发表时间：
2014-05-01
影响因子：
10.5
通讯作者：
Lee, Jun
中科院分区：
文献类型：
--
作者：
Kim, Kyoung-Min;Heo, Young-Sun;Lee, Jun
本研究提出将水玻璃基纳米二氧化硅（SS）用于水泥复合材料中。将纳米二氧化硅的加入对水泥复合材料的影响与传统的硅酸乙酯基纳米二氧化硅（ES）和硅灰（SF）进行了比较。研究发现，SS对水泥基复合材料性能的影响主要有两个方面：一是快速火山灰反应，二是对水泥基体的填孔作用。因此，SS显着提高水泥复合材料的早期强度高达184%和152%，与对照试样和试样ES夹杂物相比，分别。通过量热法、X射线衍射（XRD）、扫描电镜（SEM）和压汞法（MIP）等测试手段对纳米SiO2的改性效果进行了研究。(C)2013爱思唯尔有限公司保留所有权利。
This study proposes using sodium silicate-based nano-silica (SS) in cement composites. The effect of the addition of the proposed nano-silica on cement composites was compared to that of conventional ethyl silicate-based nano-silica (ES) and silica fume (SF). This study found that the inclusion of SS in cement composites has mainly two effects on their properties: one is a fast pozzolanic reaction, and the other is a pore-filling effect in a cement matrix. As a result, SS dramatically improves the early-age strength of cement composites by up to 184% and 152%, compared to a control specimen and the specimen with ES inclusion, respectively. Calorimetry, X-ray diffraction (XRD), scanning electron microscope (SEM) and mercury intrusion porosimetry (MIP) tests were conducted to monitor the effects of these nano-silicas. (C) 2013 Elsevier Ltd. All rights reserved.