Ettringite is one of the important hydration products of cement and it is also the main component of aluminate expansive agent.

• 钙矾石是水泥重要的水化产物之一,也是铝酸盐类膨胀剂产生膨胀的主要物质,但它在混凝土中并不稳定,容易发生重结晶。