复合型膨胀剂对混凝土抗压强度及体积变形特性的影响  

Influence of composite expansive agent on the compressive strength and volume deformation characteristics of concrete

作　　者：岳盛海 李小聪 李刚 刘磊 喻季卿 YUE Shenghai;LI Xiaocong;LI Gang;LIU Lei;YU Jiqing(Hunan Airport Management Group,Changsha 410100,China;China Construction Fifth Engineering Division Co.,Ltd.,Changsha 410004,China;China Construction Eighth Eigineering Division Co.,Ltd.Central China Branch,Wuhan 430023,China;Hunan Construction Group Co.,Ltd.,Changsha 410008,China)

机构地区：[1]湖南省机场管理集团有限公司,湖南长沙410100 [2]中国建筑第五工程局有限公司,湖南长沙410004 [3]中建八局华中建设有限公司,湖北武汉430023 [4]湖南建工集团有限公司,湖南长沙410008

出　　处：《混凝土与水泥制品》2025年第3期13-17,共5页China Concrete and Cement Products

基　　金：国家自然科学基金项目(52178261)。

摘　　要：研究了复合型膨胀剂掺量(0、8%、10%、12%)对C35、C40、C50混凝土的抗压强度、限制膨胀率、干燥收缩的影响。结果表明:掺入膨胀剂在一定程度上降低了混凝土的抗压强度,且对C50混凝土抗压强度的影响高于C35、C40混凝土;膨胀剂改善了混凝土的体积变形特性,随着膨胀剂掺量的增加,混凝土的限制膨胀率增加,干燥收缩基本呈降低趋势。The effects of composite expansion agent dosage(0,8%,10%,12%)on the compressive strength,limited expansion rate,and drying shrinkage of C35,C40,and C50 concrete were studied.The results show that the addition of expansion agent can reduce the compressive strength of concrete to a certain extent,and its effect on the compressive strength of C50 concrete is higher than those of C35 and C40 concrete.The expansion agent improves the volumetric deformation characteristics of concrete.With the increasing of the expansion agent dosage,the limited expansion rate of concrete increases,and its drying shrinkage basically shows a downward trend.

关 键 词：复合型膨胀剂 混凝土 抗压强度 限制膨胀率 干燥收缩 

分 类 号：TU528.1[建筑科学—建筑技术科学]