高耐久补偿收缩混凝土试验研究及工程应用  

Experimental study and engineering application of high durability compensated shrinkage concrete

作　　者：林清 朱正荣 周栋 汤超龙 张世双 LIN Qing;ZHU Zhengrong;ZHOU Dong;TANG Chaolong;ZHANG Shishuang(Hunan Construction Group Co.,Ltd.,Changsha 410008,China;Changsha Construction Project Quality and Safety Supervision Station,Changsha 410016,China;China Construction Fifth Engineering Division Corp.,Ltd.,Changsha 410004,China;China Construction Eighth Engineering Division Central China Construction Co.,Ltd.,Wuhan 430023,China)

机构地区：[1]湖南建工集团有限公司,湖南长沙410008 [2]长沙市建设工程质量安全监督站,湖南长沙410016 [3]中国建筑第五工程局有限公司,湖南长沙410004 [4]中建八局华中建设有限公司,湖北武汉430023

出　　处：《混凝土与水泥制品》2025年第1期29-33,共5页China Concrete and Cement Products

摘　　要：为满足长沙黄花机场T3航站楼指廊区域对混凝土高耐久补偿收缩的要求,制备了C35高耐久补偿收缩混凝土,并研究了单掺粉煤灰、复掺矿粉和粉煤灰、膨胀剂掺量对该类混凝土力学性能、限制膨胀率和耐久性能的影响。结果表明:高耐久补偿收缩混凝土的最佳配合比为C35-3组;工程实际应用表明,混凝土的28 d抗压强度为47.2 MPa,14 d水中限制膨胀率为2.6×10^(-4),28 d干燥收缩为189με,28 d电通量为284 C,28 d碳化深度为12 mm,抗硫酸盐侵蚀等级达KS90,均满足工程使用要求。In order to meet the requirements of high durability compensating shrinkage of concrete in the pier area of Terminal 3 of Changsha Huanghua Airport,C35 high durability compensated shrinkage concrete was prepared,and the effects of single fly ash,composite mineral powder and fly ash,and content of expansion agent on the mechanical properties,limited expansion rate,and durability of this type of concrete were studied.The results show that the optimal mix proportion for high durability compensated shrinkage concrete is C35-3 group.Practical engineering applications show that the compressive strength of concrete at 28 d is 47.2 MPa,the limited expansion rate in water at 14 d is 2.6×10^(-4),the drying shrinkage at 28 d is 189με,the electrical flux at 28 d is 284 C,the carbonation depth at 28 d is 12 mm,and the resistance to sulfate corrosion reaches KS90,all of which meet the requirements for engineering use.

关 键 词：混凝土 膨胀剂 强度 体积变形 耐久性能 

分 类 号：TU528.042[建筑科学—建筑技术科学]