贝利特-硫铝酸钡钙水泥的煅烧及其性能  

CALCINATION CONDITION OF BELITE-CALCIUM BARIUM SULPHOALUMINATE CEMENT AND ITS PERFORMANCE

作　　者：芦令超[1] 张卫伟[1] 轩红钟[1] 程新[1] 

机构地区：[1]济南大学材料科学与工程学院,济南250022

出　　处：《硅酸盐学报》2008年第A01期165-169,共5页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(50672033);济南大学博士基金(b0517)资助项目。

摘　　要：采用正交试验方法研究了贝利特—硫铝酸钡钙水泥熟料的煅烧条件。实验表明:该水泥熟料的最佳煅烧温度为1 350℃,保温时间为90min,冷却方式是急冷。同时发现,水泥中石膏的量佳掺量为5%(质量分数)。所制备的贝利特—硫铝酸钡钙水泥的3 d和28 d抗压强度分别为26.4 MPa和80.4MPa,显示有良好的早期力学性能;石膏能促进该水泥的水化硬化,增加钙矾石在水化早期的形成数量,这是水泥早期强度提高的主要原因。对水泥熟料及其水化产物的组成、结构和形貌进行了分析。该水泥熟料的主要矿物组成为贝利特、阿利特和硫铝酸钡钙,主要水化产物有水化硅酸钙凝胶、钙矾石和氢氧化钙等。The synthesis conditions of belite-calcium barium sulphoaluminate cement clinker were studied by the orthogonal test method. The experimental results show that the optimal sintering temperature, sintering time and cooling method are 1 350 ℃, 90 min and quick cooling respectively, and the optimal gypsum content in the cement is 5% in the cement. Under these processing conditions, the compressive strength of belite-barium calcium sulphoaluminate cement reaches 26.4 MPa and 80.4 MPa at 3 d and 28 d curing ages respectively. Gypsum can promote cement hydration and enable ettringite （AFt） to form quickly in the early period of hydration, which results in an increase of the early strength of the cement. The constitution, structure and morphology of the clinker and hydration products were analyzed by means of scanning electron microscopy and X-ray diffraction. The main minerals of the clinker are belite （C2S）, alite （C3S） and calcium barium sulphoaluminat （C2.75B1.25A3 S ）, and the main hydrates are hydrated calcium silicate （C-S-H）, AFt and calcium hydroxide （CH）.

关 键 词：贝利特 硫铝酸钡钙 水泥 

分 类 号：TQ172[化学工程—水泥工业]