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高适应性无碱液体速凝剂的制备及其应用研究
作者：陈延胜，张云，魏凯，汪源
（武汉源锦建材科技有限公司，湖北 武汉 430000）
摘要：采用常温制备工艺，以硫酸铝为主要原材料，辅以有机和无机物添加剂，制备了一种喷射混凝土用高适应性无碱液体速凝剂（FSNAFJ-1），对其性能进行了测试，并研究了速凝剂与不同水泥的相容性。试验结果表明，FSNAFJ-1掺量为6%时，基准水泥净浆的初凝和终凝时间分别为2 min35 s和7 min25 s，1 d抗压强度为9.2 MPa，28 d抗压强度比为105.4%，90 d抗压强度保留率为115.5%；在5%~6%掺量下，FSNAFJ-1与不同水泥具有良好的适应性。
关键词：常温制备工艺；液体速凝剂；凝结时间；抗压强度；适应性
中图分类号：TU528.042+.2 文献标识码：A 文章编号：1001-702X（2022）07-0122-06
Study on preparation and application properties of a high adaptability liquid alkali-free setting accelerator
CHEN Yansheng，ZHANG Yun，WEI Kai，WANG Yuan
（Wuhan Yuanjin Building Materials Technology Co. Ltd.，Wuhan 430000，China）
Abstract：A high adaptability liquid alkali-free setting accelerator（FSNAFJ-1） in sprayed concrete was prepared at room temperature by using aluminum as main material，compounding some inorganic and organic compounds. The performance of the liquid alkali-free setting accelerator was tested and the compatibility of accelerator with different cements was also studied. The result of the test show that the FSNAFJ-1 content was 6%，the initial setting time is 2 min35 s，final setting time is 7 min25 s，1 d compressive strength is 9.2 MPa，28 d compressive strength ratio is 105.4%，90 d compressive strength retention rate is up to 115.5%. FSNAFJ-1 has good compatibility with different cements at content of 5%~6%.
Key words：normal temperature preparation process，liquid setting accelerator，setting time，compressive strength，adaptability