NaOH和Na2CO3对磷渣水化过程的影响

采用NaOH和Na2CO3作为磷渣的激发剂。通过测定磷渣的凝结时间、化学结合水和反应率,研究碱激发剂对磷渣水化程度的影响。利用X射线衍射和扫描电镜分析,研究碱激发磷渣水化产物的物相组成和微观形貌。结果表明,这两种碱激发剂均能加快磷渣的水化速率,其中NaOH对磷渣的激发效果明显优于Na2CO3。NaOH和Na2CO3对磷渣水化过程的影响主要表现为促进磷渣玻璃体溶解,生成更多的C-S-H(B)和托贝莫来石,从而形成致密的结构。

Effect of NaOH and Na2 CO3 on Hydration Process of Phosphorous Slag

NaOH and Na2CO3 were used as alkali activator to activate phosphorous slag.By determining the setting time,chemical combined water and reactivity of phosphorous slag,effect of alkali activator on the hydration degree of phosphorous slag was investigated.The phase compositions and microstructure of hydration products was studied by X-ray diffraction and scanning electron microscope.The results showed that the two activators could both increase the hydration rate of phosphorous slag,and NaOH had much better effect than Na2CO3.Due to the activation of NaOH and Na2CO3,more glassy structure of phosphorous slag dissolved,leading to producing more C-S-H(B) and tobermorite,then forming dense microstructure.