氧化镁膨胀剂对大体积混凝土裂缝控制与应用  

CRACK CONTROL AND APPLICATION OF MAGNESIA EXPANSIVE AGENT IN MASS CONCRETE

作　　者：宋蕴桥 丁帅 郑文才 路峰峰 未立洪 刘欣然 SONG Yun-qiao;DING Shuai;ZHENG Wen-cai;LU Feng-feng;WEI Li-hong;LIU Xin-ran(BCEG Advanced Construction Materials Co.,Ltd.,100015,Beijing,China)

机构地区：[1]北京建工新型建材有限责任公司,北京100015

出　　处：《建筑技术》2024年第7期783-785,共3页Architecture Technology

摘　　要：城市副中心综合交通枢纽工程存在底板浇筑方量大、施工气温较高、大体积混凝土浇筑等难点,采用M型氧化镁膨胀剂配制补偿收缩混凝土,通过原材料的选择、优化配合比设计、控制绝热温升及施工养护等措施,形成整体性裂缝控制技术,可较大程度降低混凝土开裂风险,保障工程质量。Integrated transportation hub projects in urban sub-centers involves large-scale base pouring,high temperature,mass concrete pouring and other difficulties.M type magnesia expansive agent was used to prepare expansive concrete.The integral crack control technology was developed by selecting appropriate raw materials,optimizing the mix ratio,controlling the adiabatic temperature rise,curing after construction,etc.,to significantly reduce the risk of concrete cracking and guarantee the engineering quality.

关 键 词：氧化镁膨胀剂 大体积混凝土 裂缝 

分 类 号：TU74[建筑科学—建筑技术科学]