论文部分内容阅读
采用正交试验方法研究了掺杂氧化钡及形成的新矿物硫铝酸钡钙(C2.75B1.25A3S)对高阿利特水泥熟料组成与性能的影响。借助于X射线衍射和扫描电镜–能谱仪及岩相等分析方法,研究了水泥熟料的组成、结构及性能。结果表明:阿利特和硫铝酸钡钙矿物可以在同一熟料体系中共存;氧化钡的掺入促进了硫铝酸钡钙矿物的形成,同时对在低温下形成阿利特及对贝利特矿物的活化起到了重要作用。从早期强度角度分析,BaO的适宜掺量为1.8%(质量分数,下同),硫铝酸钡钙矿物的最佳设计含量为4.0%,所制备的高阿利特硅酸盐水泥的3,7,28d抗压强度分别为52.3,78.4,102.5MPa,展现了良好的早期力学性能;从后期强度分析,BaO的适宜掺量为1.3%,硫铝酸钡钙矿物的最佳设计含量为2.0%,所制备的高阿利特硅酸盐水泥的3,7,28d抗压强度分别为42.9,77.8,108.8MPa,显示了较高的后期强度。
The effects of doped barium oxide and the new mineral calcium barium sulphoaluminate (C2.75B1.25A3S) on the composition and properties of high alite cement clinker were studied by orthogonal test. The composition, structure and properties of cement clinker were studied by means of X-ray diffraction, scanning electron microscopy-energy dispersive spectroscopy and petrographic analysis. The results show that alite and barium sulphoaluminate minerals can coexist in the same clinker system. The incorporation of barium oxide promotes the formation of barium sulphoaluminate minerals. At the same time, Activation of minerals has played an important role. From the perspective of early strength, BaO optimum dosage of 1.8% (mass fraction, the same below), the best design content of calcium barium sulphoaluminate minerals 4.0%, the prepared high Alite Portland cement 3, 7,28d, respectively, compressive strength of 52.3,78.4,102.5MPa, showing good early mechanical properties; from the late strength analysis, BaO appropriate dosage of 1.3%, the best design content of barium sulphoaluminate minerals 2.0 %, The prepared high Alite Portland cement 3,7,28 d compressive strength were 42.9,77.8,108.8MPa, showing a higher late strength.