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

超塑化剂主要是大量吸附粒表面的化产物是吸附未化粒表面。

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.

发现能够产生膨胀的钙矾石是由局部化学反应所生成；它们未化的铝酸盐矿物表面原地结晶，呈放射状生长。