C60流态混凝土的工作性及强度影响因素试验研究  

Experimental study of factors affecting the workability and strength of C60 fluidized concrete

作　　者：方敏 袁文华[1,2] 张祥驰 孙克龙 FANG Min;YUAN Wenhua;ZHANG Xiangchi;SUN Kelong(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;Anhui University of Science and Technology Mine Underground Engineering Research Center of Ministry of Education,Huainan 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]安徽理工大学矿山地下工程教育部工程研究中心,安徽淮南232001

出　　处：《混凝土与水泥制品》2024年第9期42-47,共6页China Concrete and Cement Products

摘　　要：采用单因素法研究了粒径为5~10 mm和10~20 mm粗骨料级配(比例5∶5、6∶4、7∶3、8∶2)、减水剂掺量(1.3%、1.5%、1.7%、1.9%、2.1%)、骨胶比(2.6、2.9、3.2、3.5、3.8)对C60流态混凝土工作性和抗压强度的影响。结果表明:随着5~10 mm石子比例的增加,混凝土的坍落扩展度、J环扩展度和抗压强度均呈先增加后降低的趋势,T500则先降低后增加;随着减水剂掺量的增加,混凝土的坍落扩展度和J环扩展度逐渐增加,T500逐渐降低,抗压强度呈先增加后降低的趋势;随着骨胶比的增加,混凝土的坍落扩展度、J环扩展度和抗压强度先增加后降低,T500先降低后增加;当粒径为5~10 mm和10~20 mm粗骨料级配比例为7∶3、减水剂掺量为1.7%、骨胶比为2.9时,混凝土的综合性能最佳。The single factor method was used to study the effects of coarse aggregate gradation(ratios of 5∶5,6∶4,7∶3,8∶2)with particle sizes of 5~10 mm and 10~20 mm,polycarboxylate superplasticizer content(1.3%,1.5%,1.7%,1.9%,2.1%),and aggregate binder ratio(2.6,2.9,3.2,3.5,3.8)on the workability and compressive strength of C60 fluidized concrete.The results show that as the proportion of 5~10 mm stones increases,the slump expansion,J-ring expansion,and compressive strength of concrete show a trend of first increasing and then decreasing,while T500 first decreases and then increases.With the increase of polycarboxylate superplasticizer content,the slump expansion and J-ring expansion of concrete gradually increase,T500 gradually decreases,and the compressive strength shows a trend of first increasing and then decreasing.As the aggregate binder ratio increases,the slump expansion,J-ring expansion,and compressive strength of concrete first increase and then decrease,and T500 first decreases and then increases.When the gradation ratio of coarse aggregates with particle sizes of 5~10 mm and 10~20 mm is 7∶3,the polycarboxylate superplasticizer content is 1.7%,and the aggregate binder ratio is 2.9,the comprehensive performance of concrete is optimal.

关 键 词：流态混凝土 减水剂 骨胶比 骨料级配 工作性 强度 

分 类 号：TU528.53[建筑科学—建筑技术科学]