氧化铜对硅酸三钙和硫铝酸钙矿物形成及共存的影响

INFLUENCE OF CuO ON FORMATION AND COEXISTENCE OF TRICALCIUM SILICATE AND CALCIUM SULPHOALUMINATE

研究了CuO对含硫铝酸钙矿物硅酸盐水泥中硅酸三钙(C3S)和硫铝酸钙(C4A3S)矿物形成及共存的影响。借助化学分析和X射线衍射内标法分别测定了水泥熟料中C3S及C4A3S矿物的含量。用X射线衍射仪分析了熟料矿物组成,并采用差热分析和透射电镜分别研究了CuO对熟料形成特性和C3S晶体结构的影响。研究结果表明:生料中掺入生料质量0.1%的CuO,能降低水泥熟料的烧成温度,促进C3S和C4A3S两种矿物相互共存,提高熟料的强度。过量的CuO亦会降低C4A3S矿物的分解温度。

The influence of CuO on the formation and coexistence of tricalcium silicate （C3S） and calcium sulphoaluminate （C4A3S） in portland cement containing calcium sulphoaluminate was investigated. The calcium sulphoaluminate content and tricalcium silicate content in clinkers were determined by chemical analysis and the X-ray diffraction internal standard method. The composition of clinkers was analyzed by an X-ray diffraction apparatus. The influence of CuO on the formation of clinkers was investigated by differential thermal analysis, and the structure of C3S crystal was determined hy transmission electron microscopy, The results show that a reasonable addition of CuO（0. 1% in mass） in raw meal can lower the burn temperature of the clinker, promote the coexistence of C3S and C4A3S, and increase the strength of clinkers. Excessive CuO in the raw material will lower the decomposition temperature of C4A3S.