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无碱液体速凝剂对修补砂浆性能的影响
作者：王武锁1，2，袁倩男1，宋心2，赵世冉1，王欢2，任双倩1，张强1，徐潇1
（1.陕西恒盛混凝土有限公司，陕西 西安 710068；
2.陕西秦汉恒盛新型建材科技股份有限公司，陕西 西咸新区 712000）
摘要：研究了无碱液体速凝剂对水泥基修补砂浆凝结时间、抗压、抗折及拉伸粘结强度的影响规律，对掺加无碱液体速凝剂的修补砂浆的水化放热行为进行了分析。结果表明，无碱液体速凝剂的掺入加速了修补砂浆早期的水化进程，缩短了修补砂浆的凝结时间，提高了修补砂浆的抗压、抗折和拉伸粘结强度；在速凝剂掺量为0~7%时，随着无碱液体速凝剂掺量的增加，修补砂浆的抗压、抗折和拉伸粘结强度均有所提高。
关键词：修补砂浆；无碱液体速凝剂；凝结时间；力学性能
中图分类号：TU528.042+.1 文献标识码：A 文章编号：1001-702X（2023）02-0063-03
Effect of alkali-free liquid accelerator on the performance of repair mortar
WANG Wusuo1，2，YUAN Qiannan1，SONG Xin2，ZHAO Shiran1，WANG Huan2，REN Shuangqian1，ZHANG Qiang1，XU Xiao1
（1.Shaanxi Hengsheng Concrete Co. Ltd.，Xi'an 710068，China；
2.Shaanxi Qinhan Hengsheng New Building Materials Technology Co. Ltd.，Xi Xian New Area 712000，China）
Abstract：The influence law of alkali-free liquid accelerator on the setting time，compressive strength，flexural strength，and tensile bond strength of cement-based repair mortar were studied，and the hydration and heat release behavior of repair mortar with alkali-free liquid accelerator was analyzed. The results show that the alkali-free liquid accelerator have accelerated the early age hydration process of repair mortar，shortened the setting time of repair mortar，and improved the compressive strength，flexural strength，and tensile bond strength of repair mortar. When the dosage of alkali-free liquid accelerator is 0～7%，the compressive strength，flexural strength，and tensile bond strength are enhanced with the increase of the dosage of alkali-free liquid accelerator.
Key words：repair mortar，alkali-free liquid accelerator，setting time，mechanical property