固相烧结法制备磷铝酸盐水泥的研究

通过固相烧结法制备磷铝酸盐水泥,通过原料配比设计对磷铝酸盐水泥的制备过程优化,并对生料、熟料化学成分进行分析。实验结果表明磷铝酸盐水泥制备烧成温度为1 250℃,原料配比为铝矾土28%、石灰石17%、磷灰石50%、磷石膏5%。XRD结果显示,熟料的矿物组成是铝酸钙(CA)、磷酸三钙(C3P)、磷铝酸钙(CA P)和少量玻璃相。磷铝酸盐水泥1d抗压强度可达18.65MPa,但是随着养护温度和养护龄期的增加而降低。

In this paper,phosphoaluminate cement was prepared by solid phase sintering method.The preparation process of phosphoaluminate cement was optimized by raw material ratio design,and the chemical composition of raw meal and clinker was analyzed.The experimental results show that the firing temperature of the preparation of phosphoaluminate cement is 1250°C,and the ratio of raw materials is 28%bauxite,17%limestone,50%apatite and 5%phosphogypsum.XRD results show that the mineral composition of clinker is calcium aluminate(CA),tricalcium phosphate(C,P),calcium aluminophosphate(CAP)and a small amount of glass phase.The 1 d compressive strength of the phosphate aluminate cement can reach 18.65MPa,but it decreases with the increase of curing temperature and curing age.