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（英文）

发布时间：2018-08-21 08:04

【摘要】：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,C_3S、C_2S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1 d的水化程度主要与C-S-H生长模式和速率有关;影响水泥1 d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。
[Abstract]:The interaction between hydration kinetics of Portland cement and formation of hydrated calcium silicate (C-S-H) during hydration was studied. The results show that the composition of liquid phase in the hydration reaction of cement has great influence on the nucleation and growth rate of C-S-H. Therefore, the structure of disordered C-S-H aggregates on the surface of C _ S _ 3S _ 2S and calcite varies greatly, and the chemical composition of C _ S-H depends directly on the composition of the liquid phase as well as the addition of mineral admixtures and the change of temperature. The hydration induction period of Portland cement is determined by the nucleation rate of C-S-H. At the same time, the hydration degree of cement for 1 d is mainly related to the growth mode and rate of C-S-H, and the main factor affecting the hydration degree of cement 1 d is the growth rate and mode of C-S-H. And the permeability of water molecules and ions through the C-S-H layer formed on the surface of cement particles. Therefore, if the parameters regulating the rate of nucleation and growth of C-S-H are known, the early hydration of Portland cement can be effectively controlled, in particular, the degree of hydration of cement can be effectively increased. On the basis of the concept of sustainable development, the high efficiency of cement utilization is achieved.
【作者单位】： Civil
【分类号】：TQ172.11

【参考文献】