磷酸镁水泥抗压强度及影响因素研究  

Study on compressive strength and influencing factors of magnesium phosphate cement

作　　者：温金保[1,2,3] 张友才 张立霞 唐修生 祝烨然[1,2,3] 黄国泓 蔡明[1,2,3] 

机构地区：[1]南京水利科学研究院,江苏南京210024 [2]南京瑞迪高新技术有限公司,江苏南京210024 [3]江苏省(瑞迪)水工新材料工程技术研究中心,江苏南京210024 [4]南京市长江河道管理处,江苏南京210011 [5]正德职业技术学院,江苏南京211106

出　　处：《新型建筑材料》2018年第3期12-15,共4页New Building Materials

摘　　要：研究了镁磷质量比、硼砂掺量、镁砂细度、水胶比及粉煤灰掺量等因素对磷酸镁水泥抗压强度的影响规律。结果表明,镁磷质量比对抗压强度的影响比较大,存在一个最佳的比值;硼砂掺量对早期抗压强度的影响非常明显,4 h和1 d抗压强度最大降低幅度分别达79.7%和73.1%;重烧镁砂比表面积的增大有利于各龄期抗压强度的提高,水胶比的增大则不利于抗压强度的发展;少量的粉煤灰掺入对抗压强度影响较小,粉煤灰掺量过大则极大地降低了各龄期的抗压强度。The effects of magnesium to phosphorus ratio,borax content,fineness of magnesia,water binder ratio and fly ash content on the compressive strength of magnesium phosphate cement were investigated. The results show that the ratio of magne- sium to phosphorus has a very great influence on compressive strength,and there is an optimum ratio value. The influence of bo- rax content on the early compressive strength is obvious,and the compressive strength of 4h and 1 d can be reduced by 79.7% and 73.1% respectively at most. The increase of specific surface area of burned magnesia is beneficial to the increase of compres- sive strength at different age. On the contrary, the increase of water binder ratio is unfavorable to the development of compressive strength. A small amount of fly ash has little influence on the compressive strength,while the large amount of fly ash has a greater influence on the compressive strength,which greatly reduces the compressive strength at all ages.

关 键 词：磷酸镁水泥 抗压强度 硼砂 粉煤灰 

分 类 号：TU526[建筑科学—建筑技术科学] TQ177.5[化学工程—硅酸盐工业]