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Introduction to Concrete
Cement Setting and Strength Formation
Description
Cement setting and strength formation begin when water is added to cement particles. The main reaction is called hydration. During hydration, the anhydrous cement compounds react with water and form new solids that help harden the material.
Hydration can happen by two main paths: through-solution...
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Transcript
当水加入到水泥颗粒中时,水泥的水化过程即开始。
在有水存在的情况下,无水水泥化合物最初发生解离,将离子释放到水中,这些离子最终在溶液中形成硅酸盐和铝酸盐的水合物并析出沉淀,使水泥颗粒固定在原位。
随后的水化作用发生在水泥颗粒的表面。
硅酸盐的水化涉及硅酸三钙和硅酸二钙与水反应生成水化硅酸钙,这是水化过程中的主要产物,同时生成氢氧化钙。
尽管C2S和C3S的水化消耗的水量几乎相同,但与C3S相比,C2S的水化生成更多的C-S-H和更少的CH。
铝酸盐的水化始于三钙铝酸盐在石膏存在下与水反应生成钙矾石,随后转化为单硫型水化硫铝酸钙。
此外,铝酸盐的水合作用会生成水合铝酸钙和水合铝铁酸钙。
只要...
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