Effect of nano-silica on hydration, microstructure of alkali-activated slag
Effect of nano-silica on hydration, microstructure of alkali-activated slag
复制标题
纳米二氧化硅对碱激活渣水化及微观结构的影响
DOI：
10.1016/j.conbuildmat.2019.05.158
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发表时间：
2019
影响因子：
7.4
通讯作者：
Cheng Xin
中科院分区：
文献类型：
--
作者：
Wang Jinbang;Du Peng;Zhou Zonghui;Xu Dongyu;Xie Ning;Cheng Xin
水化和微观结构是碱激发材料，特别是建筑材料研究的重要内容。为了获得有关水化过程的信息，我们研究了水化速率和微观结构的演变。本研究通过在碱矿渣中添加纳米SiO_2制备纳米SiO_2复合材料，并对其性能进行评价。我们还测试了纳米二氧化硅对水化、微观结构和孔隙率的影响。试验结果表明，水泥土的综合强度得到提高，微观形貌和水化特性得到优化。水化速率表明纳米SiO2对碱矿渣早期水化的影响远大于后期水化。纳米SiO2在碱矿渣中的作用机理主要是提供硅质前驱体和作为成核种子以及促进早期水化作用。
Hydration and micro-structure are important in the study of alkali-activated materials, especially used in building materials. To obtain information about hydration processes, we have investigated the hydration rate and micro-structural evolution. In this research, we evaluated the performances of nano-silica composite, which is produced by adding nano-silica into alkali activated slag. We also tested the impacts of nano-silica on hydration, micro-structure and porosity. Results of the experiments shows that the comprehensive strength is enhanced, the microscopic morphology and hydration characteristics are optimized. Also, hydration rate suggested that the impact of nano-silica on alkali activated slag early hydration is far greater than that of later hydration. Furthermore, the nano-silica action mechanisms on alkali-activated slag discussed in this paper mainly are that the nano-silica supplied siliceous precursor and served as nucleation seed and its accelerated early hydration effects.