功能组分对水泥基修补砂浆的性能影响研究

Study on the effect of functional components on the performance of cement-based mortar

通过往水泥基材料中加入外加剂、硅灰等功能组分的方法,研制一种快速修补混凝土裂缝的材料。通过正交试验研究了早强剂,硅灰以及减水剂3种功能组分,对比找出对水泥胶砂快速修补材料强度影响的最佳掺量,以达到水泥胶砂快速修复材料的最佳强度。进一步研究了掺入外加剂和硅灰的水泥基材料的凝结时间。结果表明:掺入一定量的早强剂,硅灰和减水剂对增加水泥胶砂快速修复材料的强度有着显著的影响。通过正交试验分析,早强剂,硅灰,减水剂3种材料的掺量分别占胶凝材料的2%、6%、0.25%能够达到水泥胶砂快速修复材料的最优掺量,并且能够达到混凝土结构快速修复材料7 d抗压强度25 MPa以上,1 d抗折强度5 MPa以上的技术指标。

Addition of admixtures and silica fume to cement-based materials is a way to quickly repair concrete cracks.Through the orthogonal test,the three functional components of early strength agent,silica fume and water reducing agent were studied,and the optimum dosage of early effect on the strength of cement mortar fast repair was found out to achieve the most rapid restoration of cement mortar.Excellent strength.The coagulation time of the cementitious materials doped with admixtures and silica fume were further studied.The results show that the incorporation of a certain amount of early strength agent,silica fume and water reducing agent have a significant effect on increasing the strength of cement mortar fast repairing material.Through the orthogonal test,the contents of the three materials,early strength agent,silica fume and water reducing agent,respectively,accounted for 2%,6%and 0.25%of the ementitious material respectively,cand the optimum content of cement mortar fast repair material was reached.And can achieve the rapid repair of concrete structure 7d compressive strength of more than 25MPa,1d flexural strength of more than 5MPa technical indicators.