高流动性浆体预填骨料混凝土抗压强度研究  

RESEARCH ON COMPRESSIVE STRENGTH OF PRE-FILLED AGGREGATE CONCRETE WITH HIGH FLUIDITY SLURRY

作　　者：金鹭云 杨柳 杨家琦 冯鹏[3] 邢国荣[4] 顾雅彬 JIN Lu-yun;YANG Liu;YANG Jia-qi;FENG Peng;XING Guo-rong;GU Ya-bin(BCEG Advanced Construction Materials Co.,Ltd.,100015,Beijing,China;School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,100083,Beijing,China;Tsinghua University,100084,Beijing,China;Beijing Construction Engineering Group Co.,Ltd.,100055,Beijing,China;Beijing International Construction Group Co.,Ltd.,100054,Beijing,China)

机构地区：[1]北京建工新型建材有限责任公司,北京100015 [2]中国矿业大学(北京)力学与建筑工程学院,北京100083 [3]清华大学,北京100084 [4]北京建工集团有限责任公司,北京100055 [5]北京国际建设集团有限公司,北京100054

出　　处：《建筑技术》2021年第9期1067-1070,共4页Architecture Technology

摘　　要：预填骨料混凝土是指先将粗骨料填充在模板中,振实后用配制的砂浆填满骨料间的空隙而形成的混凝土。用5~25 mm的小粒径骨料代替水利工程中大粒径粗骨料,配制预填骨料混凝土并研究其抗压强度。结果表明,预填骨料混凝土抗压强度随龄期增加而增大,其28 d抗压强度随水胶比的增大而减小,随复合型外加剂掺量的增加而增大;掺加粉煤灰会降低预填骨料混凝土的早期抗压强度,提高其后期抗压强度;预填骨料混凝土在最佳细砂值时抗压强度最大。Coarse aggregate was filled in the template in advance and the gap between aggregates was filled by mortar after vibration,which produced the pre-filled aggregate concrete.Aggregates with small particle size of 5-25 mm were used to replace coarse aggregates in water conservancy project to prepare pre-filled aggregate concrete,and its compressive strength was studied.The results showed that:the compressive strength of pre-filled aggregate concrete increased with the increase of concrete age;the compressive strength 28 days later decreased with the increase of water-binder ratio,and improved with the increase of compound admixture content;fly ash reduced the early compressive strength of pre-filled aggregate concrete and improved its later compressive strength;the compressive strength was the largest when the fine sand value was the most suitable.

关 键 词：预填骨料混凝土 抗压强度 复合型外加剂 

分 类 号：TU74[建筑科学—建筑技术科学]