高性能无碱液体速凝剂的研究与应用  

Study and application of high-performance alkali-free liquid accelerator

作　　者：李崇智 邓松文 董鹏 熊梦琴 万海仑 黎高财 LI Chongzhi;DENG Songwen;DONG Peng;XIONG Mengqin;WAN Hailun;LI Gaocai(School of Civil and Traffic Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Fuzhou Industrial Branch of China Railway 11th Bureau Group Bridge Co.Ltd.,Fuzhou 344113,China)

机构地区：[1]北京建筑大学土木与交通工程学院,北京100044 [2]中铁十一局集团桥梁有限公司抚州工业分公司,江西抚州344113

出　　处：《新型建筑材料》2023年第2期59-62,共4页New Building Materials

摘　　要：在65℃条件下将硫酸铝、二乙醇胺、硫酸镁以一定比例混合溶解,再掺加一种二乙醇胺羧酸酯与硅溶胶的络合稳定剂,合成了高性能无碱无氟液体速凝剂HLA,对其性能进行测试。结果表明:在环境温度-10~30℃条件下速凝剂HLA储存2个月的性能稳定;掺量为7%~8%时,对不同牌号普通硅酸盐水泥的初凝时间为2~4 min,终凝时间为6~10 min;水泥胶砂6 h抗压强度约1.0 MPa,1 d抗压强度为11.0~15.0 MPa,28 d抗压强度比>100%,符合Q/CR 807—2020《隧道喷射混凝土用液体无碱速凝剂》通用要求。At 65℃,aluminum sulfate,diethanolamine and magnesium sulfate were mixed and dissolved in a certain proportion into a solution,and then a complexing stabilizer of diethanolamine carboxylate ester and silica sol was added to synthesize high performance alkali-free fluorine-free liquid accelerating agent HLA.Then its properties were tested.The experimental results show that the performance of HLA accelerator is stable when stored at ambient temperature of-10~30℃for 2 months.According to the content of 7%~8%for different ordinary Portland cement,the setting time meets the initial setting of 2~4 min,the final setting of6~10 min:The compressive strength of cement mortar is about 1.0 MPa in 6 h,11.0~15.0 MPa in 1 d,and the compressive strength ratio is>100%in 28 d,meeting the general requirements of Q/CR 807—2020"Liquid alkali-free accelerating agent for tunnel shotcrete".

关 键 词：无碱液体速凝剂 稳定性 适应性 早期强度 

分 类 号：TU528.042.1[建筑科学—建筑技术科学]