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水泥水化与水化硅酸钙的结构和化学组成之间的相互作用

DOI: 10.14062/j.issn.0454-5648.2015.10.03

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Abstract:

研究了硅酸盐水泥水化动力学与水化过程中水化硅酸钙(C-S-H)形成之间的相互作用。结果表明水泥水化反应过程中的液相组成对C-S-H的成核与生长速率有很大的影响。因此,对于不同的水泥,C3S、C2S和方解石表面的无序纳米C-S-H颗粒团聚体的结构变化很大;掺加矿物掺合料和温度变化对此也有很大影响。C-S-H的化学组成直接取决于液相组成。硅酸盐水泥水化诱导期由C-S-H的成核速率决定。同时,水泥1d的水化程度主要与C-S-H生长模式和速率有关;影响水泥1d水化程度的因素主要是C-S-H生长的速率和模式,以及水分子和离子透过水泥颗粒表面已形成的C-S-H层的渗透性。因此,如果调控C-S-H成核和生长的速率的参数已知,则可以有效地控制硅酸盐水泥的早期水化,特别是可有效提高水泥水化程度,在可持续发展理念的基础上达到水泥的高效利用。

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