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粘度改性材料在C60超高层泵送混凝土中的应用研究
作者：李信1，2，陈露一1，2，黄有强1，2，张志豪1，2，谭洪波3
（1．中铁大桥局科学研究院有限公司，湖北 武汉 430034；
2．桥梁结构健康与安全国家重点实验室，湖北 武汉 430034；3．武汉理工大学，湖北 武汉 430034）
摘要：掺入粘度改性材料配制C60超高层泵送混凝土，研究了粘度改性材料掺量对混凝土工作性能、力学性能和耐久性能的影响。结果表明：C60超高层泵送混凝土中掺入粘度改性材料能够提高拌合物的流动性，减少1 h经时损失和倒桶排空时间，降低混凝土的压力泌水率和离析率；掺入粘度改性材料对混凝土力学强度基本无影响；粘度改性材料能够提高混凝土抗氯离子渗透性能，降低干燥收缩率。
关键词：粘度改性材料；泵送混凝土；流动性能；力学性能
中图分类号：TU528.04 文献标识码：A 文章编号：1001-702X（2020）02-0041-04
Applied research of viscosity-modified material in C60 super high-rise pumping concrete
LI Xin1，2，CHEN Luyi1，2，HUANG Youqiang1，2，ZHANG Zhihao1，2，TAN Hongbo3
（1.China Railway Bridge Bureau Scientific Research Institute Co. Ltd.，Wuhan 430034，China；
2.State Key Laboratory of Bridge Structural Health and Safety，Wuhan 430034，China；
3.Wuhan University of Technology，Wuhan 430034，China）
Abstract：C60 super high-rise pumping concrete was prepared with viscosity-modified materials，the influence of viscosity-modified materials on working performance，mechanical performance and durability of the concrete was researched. Results show that the C60 super high-rise pumping concrete blended with viscosity-modified materials can improve the flow performance of the concrete，reduce slump and extension loss by 1 h and reduce pressure bleeding rate and segregation rate of the concrete. The addition of viscosity-modified materials has no effect on the mechanical strength of the concrete. The viscosity-modified material can improve the anti-chloride ion permeability of concrete and reduce the dry shrinkage.
Key words：viscosity-modified material，pumping concrete，flowing properties，mechanical properties