Influence of nano-SiO2 on the Portland cement pastes
Influence of nano-SiO2 on the Portland cement pastes
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DOI：
10.1016/j.compositesb.2011.12.015
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发表时间：
2012-09-01
影响因子：
13.1
通讯作者：
Papayianni, I.
中科院分区：
文献类型：
--
作者：
Stefanidou, M.;Papayianni, I.
纳米技术的发展使材料具备了新的性能，在过去的几年中，人们付出了大量努力将纳米粒子引入水泥浆体中，以改善其性能并生产出性能更优的材料。在当前的研究工作中，将通过热解法制得的比表面积为200平方米/克的纳米二氧化硅以不同的百分比（0%、0.5%、1%、2%和5%）添加到高强度水泥浆体中。对这些浆体在不同龄期的力学性能和结构性能进行了测试。纳米粒子起到结晶核的作用，形成了大的、自形的钙 - 硅成分晶体，在一定百分比范围内，有助于生产出结构致密、孔隙率降低且强度提高的材料。© 2012爱思唯尔有限公司。保留所有权利。
The evolution of nanotechnology provides materials with new properties and over the last years a lot of effort has been put to introduce nano-particles into cement pastes in order to improve their properties and to produce materials of better performance. In the present research work, nano-SiO2 produced by pyrolysis and with specific area of 200 m(2)/g has been added at different percentages (0%, 0.5%, 1%, 2% and 5%) to high-strength cement pastes. These pastes were tested for their mechanical and structural properties at different ages. Nanoparticles act as nuclei for crystallization and large, idiomorphic crystals of Ca-Si composition were formed assisting, up to a certain percentage, in producing materials with dense structure, reduced porosity and improved strength. (C) 2012 Elsevier Ltd. All rights reserved.