新型无氟无碱液体速凝剂的制备与性能研究  

Preparation and performance of new fluorine-free alkali-free liquid accelerator

作　　者：宋少飞[1] 曲启恒 李文丽 周福林[1] SONG Shaofei;QU Qiheng;LI Wenli;ZHOU Fulin(Department of Applied Chemistry of Yuncheng University,Yuncheng 044000,China;Shanxi Huanghe New Chemical Company,Yuncheng 044000,China)

机构地区：[1]运城学院应用化学系,山西运城044000 [2]山西黄河新型化工有限公司,山西运城044000

出　　处：《新型建筑材料》2023年第3期139-142,共4页New Building Materials

基　　金：山西省青年科技研究基金项目(2019L0870);运城学院学科建设经费资助项目(615174)。

摘　　要：以硫酸铝和改性三乙醇胺为主要原料,用柠檬酸、酒石酸、EDTA二钠及磷酸等为辅助用料,通过单因素试验和正交试验,制备了一种新型无氟无碱液体速凝剂,并对其凝结时间和1 d抗压强度进行了测试。结果显示,基准水泥中无氟无碱液体速凝剂的折固掺量为2.8%时,初凝时间为2 min27 s,终凝时间为6 min30 s,1 d抗压强度为9.67 MPa,pH值为2.20。同时,该液体速凝剂对几种工程水泥也表现出了良好的适应性。With aluminum sulfate and modified three-ethanolamine as main materials and citric acid,tartaric acid,EDTA disodium and phosphoric acid as auxiliary materials,a new fluorine-free alkali-free liquid accelerator was prepared by single component test and orthogonal test.The setting time and 1 d compressive strength were determined.The results showed that when the solid breaking parameter of liquid accelerator in reference cement was 2.8%,the initial setting time was 2 min27 s,the final setting time was 6 min30 s,the compressive strength of 1 d was 9.67 MPa,and the pH value was 2.20.At the same time,the liquid accelerator also showed good adaptability to several engineering cement.

关 键 词：液体速凝剂 无氟无碱 凝结时间 早期抗压强度 

分 类 号：TU528.042.1[建筑科学—建筑技术科学]