贝利特-硫铝酸钡钙水泥的合成及力学性能

Synthesis and Mechanical Performance of Belite-Calcium Barium Sulphoaluminate Cement

选择熟料率值和硫铝酸钡钙掺量为影响因素,采用正交试验法研究了贝利特-硫铝酸钡钙水泥熟料的合成条件和力学性能.研究结果表明,贝利特-硫铝酸钡钙水泥熟料的最佳组成为:硅率为2.9,铝率为1.1,石灰饱和系数为0.81(均为质量比),硫铝酸钡钙掺量为9%(质量分数),适宜的煅烧温度为1 380℃.在最佳条件下合成的贝利特-硫铝酸钡钙水泥的3,28,90 d抗压强度分别达到了23.8,80.9,97.4 MPa,展现了良好的力学性能.利用XRD,SEM-EDS和岩相分析等测试手段分析了该熟料的组成和结构.

Synthesis conditions and mechanical performance of belite-calcium barium sulphoaluminate cement clinker were investigated by the orthogonal test method taking clinker modulus and content of calcium barium sulphoaluminate （C2.75 B1.25 A3 -↑S） as the influencing factors. Results show that the optimal silica modulus, alumina modulus, lime saturation factor and content of C2.75B1.25 A3 -↑S are 2.9, 1.1, 0.81 and 9 % respectively, and the optimal sintering temperature is 1 380 ℃ The compressive strength of the cement prepared under the conditions reaches to 23.8 MPa, 80.9 MPa and 97.4 MPa at 3, 28, 90 d curing ages. The mineral constituents and structures of the clinker were analyzed by the means of XRD,SEM-EDS and light microscope.