中文摘要：

为澄清无水硫铝酸钙的水化反应机理,利用化学试剂Ca CO3、Al2O3、Ca SO4合成纯度达90%以上的无水硫铝酸钙（C4A3）单矿物,研究其在水灰比为0.3、05、0.7条件下的水化反应,包括不同水化时间的水化产物及变化规律,用X射线衍射仪、综合热分析仪和扫描电子显微镜对水化产物进行分析.结果表明：水化产物为含不同摩尔结晶水的2种单硫型水化硫铝酸钙C4AH12（AFm-12）和C4AH1 4（AFm-14）以及无定形状态的铝凝胶（AH3）,整个水化过程未生成钙矾石（AFt）;随着水化时间的延长,C4AH12（AFm-12）会逐渐转化为C4AH1 4（AFm-14）;水化反应主要集中发生在3~12 h,后期C4AH1 4晶体不断长大.

英文摘要：

Calcium sulphoaluminate（ C4A3） with high purity（ 90%） was synthesized from Ca CO3,Al2O3 and Ca SO4,and the hydration of C4A3,including hydration products and their evolution at different hydration time,was investigated at different water / solid ratios（ mw/ ms= 0.3,0.5,0.7）,aiming to clarify the hydration mechanism. The hydration products were examined by means of X-ray diffraction, differential scanning calorimetry-thermogravimetry and scanning electron microscope. There are two kinds of calcium monosulphoaluminate,namely,C4AH1 4and C4AH1 2,and amorphous aluminium gel（ AH3）,while there is no ettringite（ AFt） in the hydration products. C4AH12gradually converts to C4AH1 4as the extension of hydration duration. The hydration reaction mainly occurs between 3 and 12 hours after mixed with water. The crystals of C4AH1 4grow larger in later period.