早强剂-水泥浆液物理力学性能试验及工程应用  

Physical and Mechanical Properties Test and Engineering Application of Early Strength Agent-Cement Slurry

作　　者：张启军 李韵廷 白晓宇[2] 张双武 冯家亮 乔凤阳 闫楠[2] ZHANG Qi-jun;LI Yun-ting;BAI Xiao-yu;ZHANG Shuang-wu;FENG Jia-liang;QIAO Feng-yang;YAN Nan(Qingdao Yegao Construction Engineering Co.,Ltd.,Qingdao 266042,China;College of Civil Engineering,Qingdao Technological University,Qingdao 266520,China;4th Engineering Co.,Ltd.,20th Bureau Group,China Railway,Qingdao 266061,China;Northwest Comprehensive Investigation,Design and Research Institute,Xi’an 710000,China)

机构地区：[1]青岛业高建设工程有限公司,青岛266042 [2]青岛理工大学土木工程学院,青岛266520 [3]中铁二十局集团第四工程有限公司,青岛266061 [4]西北综合勘察设计研究院,西安710000

出　　处：《科学技术与工程》2025年第4期1613-1619,共7页Science Technology and Engineering

基　　金：国家自然科学基金(51809146);山东省自然科学基金(ZR2024ME224)。

摘　　要：为加快工程进度,一般采用添加早强型外加剂以提高水泥浆液的早期强度,选取氯化钙、硫酸钠、三乙醇胺、合成甲酸钙、HR-SA15种早强剂,通过室内试验分析不同早强剂作用下水泥浆液的流动度、收缩率、抗压强度,从而揭示不同早强剂类型对水泥浆液早期物理力学性能的影响规律。结果表明:各早强剂均能够满足现场注浆需求,确保水泥浆液的流动度可以长时间内保持稳定。合成甲酸钙-水泥浆液在60 min内的流动度增幅较大,缓凝效果明显;其余早强剂-水泥浆液在60 min内的浆液流动度稍有增加,但增幅不大。(HR-SA1)-水泥浆液试件在不同龄期的抗压强度均显著高于普通水泥浆液试件,而其他4种早强剂对水泥浆液抗压强度提高效果均不明显。(HR-SA1)-水泥浆液试件终凝后平均收缩量及收缩率较低,远低于其他早强剂-水泥浆液试件的平均收缩量及收缩率。经青岛市某地铁车站预应力锚索施工现场验证,(HR-SA1)-水泥浆液物理力学性能测试值与室内试验结果基本吻合,为HR-SA1早强剂在实际工程中的推广应用奠定了基础。In order to speed up the engineering progress,early strength additives are usually added to improve the early strength of cement grout.Calcium chloride,sodium sulfate,triethanolamine,synthetic calcium formate,HR-SA1 and other early strength additives were selected,the flowability,shrinkage rate,and compressive strength of cement slurry under the action of different early strength agents were explored through indoor experiments.In this way,the influence of different types of early strength agents on the early physical and mechanical properties of cement slurry were revealed.The results show that all early strength agents can meet the needs of on-site grouting requirements,ensuring that the fluidity of the cement slurry can be stable for a long time.The flowability of the synthesized calcium formate-based cement slurry significantly increases within 60 minutes,indicating a notable retarding effect.The fluidity of the other early strength agents cement slurry slightly increases within 60 minutes,but the amplitude is not significant.The compressive strength of(HR-SA1)-cement slurry specimens at all ages is significantly higher than that of ordinary cement slurry specimens,while the other four early strength agents have no significant effect on improving the compressive strength of cement slurry.The average shrinkage and shrinkage rate of(HR-SA1)-cement slurry specimens after final setting are very low,far lower than the average shrinkage and shrinkage rate of other early strength agent cement slurry specimens.It is verified by the construction site of prestressed anchor cable of a subway station in Qingdao City.The test values of the physical and mechanical properties of cement slurry are basically consistent with the results of laboratory test,which lays a foundation for the popularization and application of HR-SA1 early strength agent in practical engineering.

关 键 词：早强剂 水泥浆液 流动度 抗压强度 收缩率 

分 类 号：TU43[建筑科学—岩土工程]