摘要
试验采用MgO、KH2PO4制备新型超快硬磷酸盐水泥修补材料。研究该材料的凝结时间和强度,并对该材料的水化产物与微观结构进行分析。研究发现,随着缓凝剂掺量的增大,新型磷酸盐水泥修补材料的凝结时间逐渐延长,而强度则随之降低;KH2PO4与MgO的比值(P/M)对凝结时间影响较小,对强度的影响则比较显著,当P/M为1∶4时,修补材料强度取得最大值,其2h抗压强度达35MPa以上,28d抗压强度达80MPa以上;新型磷酸盐水泥修补材料施工成型过程中无氨气产生,水化产物有MgKPO4.6H2O、MgKPO4.H2O、Mg(3PO4)2.4H2O等,以MgKPO4.6H2O为主。
The new phosphate cement repair material was prepared based on MgO, KH2PO4.The setting time and strength of the new phosphate cement repair material were investigated,the hydration products and microstructure of the MPC were discussed too. The results showed that setting time of the new phosphate cement repair material increases with the increase of retarder content, while the strength decreases. The strength of the new phosphate cement repair material reached the highest when the ratio of KH2PO4 to MgO is 1;4, the compressive strength reached above 35 MPa at 2 h and 80 MPa at 28 d. It was found the hydration products of the new phosphate cement repair material are mostly MgKPO4·6H20, some MgKPO4·H2O and Mg3（PO4）·4H20.
出处
《新型建筑材料》
北大核心
2009年第7期49-51,共3页
New Building Materials
基金
国家自然科学基金项目(50702076)
重庆市科技攻关重点项目(CSTC2007AB7014)
后勤工程学院学术创新基金(YZ07-43301)
