桥面铺装免蒸养超高性能混凝土力学性能试验研究  

Experimental Study on Mechanical Properties of Steam-free Curing Ultra-high Performance Concrete for Bridge Deck Pavement

作　　者：芦向晶 赵鹏 邵琦 王涛 曹鹤磊 刘隽江 

机构地区：[1]新疆研科节能科技有限公司,新疆乌鲁木齐830000 [2]新疆高性能混凝土辅助性胶凝材料工程技术研究中心,新疆乌鲁木齐830002

出　　处：《混凝土世界》2023年第8期33-37,共5页China Concrete

基　　金：新疆维吾尔自治区科技支疆项目(2022E02022);新疆维吾尔自治区“两区”科技发展计划项目(2022LQ03008);新疆高性能混凝土辅助性胶凝材料工程技术研究中心(GC2021006)。

摘　　要：针对桥面铺装UHPC技术研究,采用天然砂,运用正交试验方法,探究水胶比、高强功能性复合掺合料掺量、钢纤维掺量(体积分数)及石粉掺量等因素对免蒸养UHPC力学性能的影响规律。探析UHPC不同类别尺寸试件成型及养护方式下的强度发展规律及变化,经各龄期强度敏感性分析,通过比对试验研究,实现了应用新疆地材配制免蒸养UHPC的技术路径,且最优试验组混凝土的28d抗压强度达到135.5MPa,60d抗压强度达到144.4MPa。For the study of UHPC technology for bridge deck pavement,natural sand was used to investigate the influence of water-cement ratio,the amount of high-strength functional compound dopant,the amount of steel fiber(volume fraction)and the amount of stone powder on the mechanical properties of steam-free UHPC by using orthogonal test method.To explore the strength development law and change under different categories of UHPC size specimen forming and curing methods,after the sensitivity analysis of strength at each age,through the comparative experimental study,the technical path of applying Xinjiang ground material to formulate UHPC without steam curing was realised,and the 28d compressive strength of concrete in the optimal test group reached 135.5 MPa,and the 60d compressive strength reached 144.4 MPa.

关 键 词：超高性能混凝土 免蒸养 力学性能 桥面铺装 

分 类 号：U444[建筑科学—桥梁与隧道工程]