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水泥颗粒水化产物上而不是吸附未水化水泥颗粒。

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.

发产生膨胀钙矾石是由局部化学反应所生成；它们未水化铝酸盐矿物原地结晶，呈放射状生长。