It is shown that expansible ettringite forms in the topochemical reaction,and crystallizes in-situ on the surface of unhydrated aluminate minerals and orients radially.

发现能够产生膨矾石是由局部学反应所生成；它们在未水铝酸盐矿物表面原地结晶，呈放射状生长。

Superplasticizer mainly absorbs on the cement hydrates covering the surface of cement particles instead of on the surface of unhydrated particles.

超塑要是大量吸附在水泥颗粒表面水产物上而不是吸附在未水水泥颗粒表面。