差热分析法研究聚羧酸对早期钙矾石生成的影响

o improve cement’s some performance, special admixtures are usually added into cement. Mechanisms of different admixtures are diverse. In order to further understand influences and micro-changes of different admixtures, differential thermal analysis technology is used to study the content and composition of hydration products in early time. By texts, DTA lines of pure cement and cement with admixtures is compared, so the changes of hydration products are concluded, further, hydration mechanism is better known. Through comparing DSC and TG lines, we have some conclusions. Aft’s reduce is related to admixtures, or some Aft translate into AFm, or C3A has reaction with calcium carbonate and AFm is generated. Moreover, carboxyl ate admixtures have promoted calcium silicate’s hydration.