硼泥掺杂对磷酸镁水泥性能的影响

Influence of Boron Mud Doping on Properties ofMagnesium Phosphate Cement

硼泥是硼砂和硼酸生产过程中产生的工业废渣,大量排放不但占用大量的土地,造成地下水污染,失水后飞散成为粉尘,还造成大气污染。将硼泥掺杂到以重烧氧化镁和磷酸二氢钾为原材料制备的磷酸镁水泥中,研究硼泥掺杂对磷酸镁水泥性能的影响。结果表明:硼泥能够延长磷酸镁水泥的缓凝时间,同时能够提高水泥的抗压强度。硼泥的最佳掺量为10%,水泥凝结时间由原来的29 min延长到35 min,水泥抗压强度由56.21 MPa提高到58.7 MPa。XRD分析结果表明,硼泥的加入没有改变磷酸镁水泥的矿相结构。本研究可以为硼泥固废资源化利用提供依据。

Boron mud is industrial waste residue produced in the production process of borax and boric acid.A large amount of discharge not only occupies a large amount of land,causes groundwater pollution,and scatters into dust after water loss,and also causes air pollution.Boron mud was doped into magnesium phosphate cement prepared from dead-burned magnesia and potassium dihydrogen phosphate,and the effect of boron mud as admixture on the properties of magnesium phosphate cement was studied.The research results show that boron mud can prolong the retardation time of magnesium phosphate cement and improve the compressive strength of cement.The experimental results show that when the content of boron mud is 10%,the setting time of cement is extended from 29 min to 35 min,and the compressive strength of cement increases from 56.21 MPa to 58.7 MPa.XRD analysis results show that the addition of boron mud does not change the mineral phase structure of magnesium phosphate cement.This study can provide a basis for the resource utilization of boron mud solid waste.