泵送不发火防静电砂浆的配合比设计和性能研究  

Study on Mix Design and Performance of Pumping Misfire Antistatic Mortar

作　　者：张慧芳 李晓卫 张康 ZHANG Huifang;LI Xiaowei;ZHANG Kang(Sino-Sina Building Materials Co.,Ltd.,Zhengzhou 450100,China;Sina Liaoning New Material Technology Co.,Ltd.,Fuxin 123000,China)

机构地区：[1]中德新亚建筑材料有限公司,河南郑州450100 [2]新亚辽宁新材料科技有限公司,辽宁阜新123000

出　　处：《河南科技》2025年第4期63-67,共5页Henan Science and Technology

摘　　要：【目的】通过泵送不发火防静电砂浆的配合比设计,提高砂浆性能,满足特定应用场景的需求,减少应用中出现的起皮、开裂和空鼓等现象。【方法】从泵送不发火防静电砂浆的配合比设计出发,研究不同白云砂级配对泵送不发火防静电砂浆的力学性能、不发火性能、防静电性能、拉伸黏结性能和收缩性能的影响。【结果】结果表明,通过对不发火防静电砂浆进行配合比设计,可以制备出可泵送型的不发火防静电砂浆,且在白云砂级配10~20目、20~40目、40~70目的比例为30∶40∶30时,砂浆的抗压强度达到116.2 MPa,砂浆的拉伸黏结强度达到1.78 MPa,砂浆的干燥收缩尺寸变化率为0.041%。【结论】当白云砂级配10~20目、20~40目、40~70目的比例为30∶40∶30时,流动性较好,可作为泵送不发火防静电砂浆使用,且该级配具有良好的拉伸黏结性能,可有效减少起皮现象的发生,其较低的干燥收缩尺寸变化率可减少裂缝的产生和空鼓现象的出现。[Purposes]Through the mix design of pumping misfire antistatic mortar,the performance of mortar is improved to meet the needs of specific application scenarios,and the phenomena of peeling,cracking and hollowing in the application are solved.[Methods]In this paper,starting from the mix de⁃sign of pumping misfire antistatic mortar,the effects of different dolomite sand gradations on the me⁃chanical properties,misfire performance,antistatic properties,tensile bonding properties and shrinkage properties of pumping misfire antistatic mortar were studied.[Findings]The results show that the pump⁃able misfire antistatic mortar can be prepared by designing the mix ratio of the misfire antistatic mortar.When the proportion of dolomite sand gradation of 10~20 mesh,20~40 mesh and 40~70 mesh is 30∶40∶30,the compressive strength of mortar reaches 116.2 MPa,the tensile bond strength of mortar reaches 1.78 MPa,and the change rate of drying shrinkage size of mortar is 0.041%.[Conclusions]When the proportion of dolomite sand gradation of 10~20 mesh,20~40 mesh and 40~70 mesh is 30∶40∶30,the flu⁃idity is better,and it can be used as a pumping misfire antistatic mortar.The gradation has good tensile bonding performance,which can effectively reduce the occurrence of peeling phenomenon,and its lower drying shrinkage size change rate can reduce the occurrence of cracks and hollowing phenomenon.

关 键 词：泵送 不发火性 防静电 拉伸黏结 干燥收缩 

分 类 号：TU578.1[建筑科学—建筑技术科学]