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首页> 外文期刊>The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical >Formation of the C-S-H layer during early hydration of tricalcium silicate grains with different sizes
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Formation of the C-S-H layer during early hydration of tricalcium silicate grains with different sizes

机译：不同尺寸的三水硅酸钙晶粒早期水化过程中C-S-H层的形成

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摘要

Portland cement is a mixture of solid phases which all react with water. Tricalcium silicate (Ca3SiO5) is its main component and is often used in model systems to study cement hydration. It is generally recognized that setting and hardening of cement are due to the formation, by a dissolution-precipitation process, of a calcium silicate hydrate (C-S-H) on anhydrous grains during Ca3SiO5 hydration. The purpose of this paper is to study the effect of Ca3SiO5 particle size on the nucleation-growth process of C-S-H. An experimental study of the rate of hydration by using different grain sizes under controlled conditions has been performed. The experimental data have been compared with results obtained by numerical simulation based on a particles-aggregation model. The thickness of the C-S-H layer when the reaction becomes limited by diffusion has been then estimated.
机译：波特兰水泥是全部与水反应的固相混合物。硅酸三钙（Ca3SiO5）是其主要成分，通常在模型系统中用于研究水泥的水化作用。通常认为，水泥的凝固和硬化是由于在Ca3SiO5水化过程中在无水晶粒上通过溶解沉淀过程形成了水合硅酸钙（C-S-H）。本文的目的是研究Ca3SiO5粒径对C-S-H形核生长过程的影响。通过在控制条件下使用不同粒度的水合速率的实验研究已经进行。将实验数据与通过基于粒子聚集模型的数值模拟获得的结果进行了比较。然后，已经估计出反应由于扩散而变得受限时的C-S-H层的厚度。

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