一、引言在活化砂中,所谓加入适量的碳酸钠活化剂,其实化学当量都会有些过量。活化砂中总剩余着一定数量的结晶碳酸钠水化物,所以一般不大会出现过活化现象。并且会因碳酸钠水化物粘结相的粘结作用,使活化砂的某些性能得到改善。 I. Introduction In activated sand, the so-called adding sodium carbonate activator, in fact, there will be some chemical excess. There is always a certain amount of crystalline sodium carbonate hydrate remaining in the activated sand, so activation is generally not observed. And some properties of the activated sand are improved due to the binding effect of the sodium carbonate hydrate binder phase.