超高性能混凝土的配制及性能研究  

Research and Application of Ultra High Performance Concrete Powdery Material

作　　者：明阳 陈平 李玲 胡成 李青 张国志[4] 陈飞翔[4] Ming Yang;Chen Ping;Li Ling;Hu Cheng;Li Qing;Zhang Guozhi;Chen Feixiang(Guangxi Key Laboratory of New Energy and Building Energy Saving,Guilin,Guangxi 541004;College of Civil and Architecture Engineering,Guilin University of Technology,Guilin,Guangxi 541004;Guangxi Engineering and Technology Center for Utilization of Industrial Waste Residue in Building Materials,Guilin,Guangxi 541004;CCCC Second Harbour Engineering Co.,Ltd.,Wuhan,Hubei 430040)

机构地区：[1]广西建筑新能源与节能重点实验室,广西桂林541004 [2]桂林理工大学土木与建筑工程学院,广西桂林541004 [3]广西工业废渣建材资源利用工程技术研究中心,广西桂林541004 [4]中交第二航务工程局有限公司,湖北武汉430040

出　　处：《非金属矿》2021年第4期26-29,共4页Non-Metallic Mines

基　　金：广西自然科学基金(2020GXNSFBA297034);广西重点研发计划(桂科AB19259008,桂科能19-J-21-12,桂科能19-J-21-7)。

摘　　要：采用紧密堆积理论设计优化超高性能混凝土(UHPC)干粉料配合比,研究胶凝材料体系、胶砂比和钢纤维体积掺量对UHPC性能的影响,以及优化配比下UHPC干粉料的干缩性能和工程应用效果。结果表明,UHPC干粉料最优配合比(每立方米)为:水泥693 kg、硅灰220 kg、超细矿物掺和料187 kg、石英砂1000 kg、钢纤维176 kg、粉剂外加剂8.8 kg。该配合比下,UHPC混凝土需水量仅为干粉料总质量7.22%,UHPC性能优异。The mix ratio of UHPC powdery material was optimized by close-packing theory.The performance of UHPC was studied under the different conditions of cementitious material system,mortar ratio and steel fiber volume content,the shrinkage performance and application effect of UHPC powdery material were studied.The results show that the optimal mix ratio of UHPC powdery material(per cubic meter)is the cement of 693 kg,the silica fume of 220 kg,the ultrafine mineral admixture of 187 kg,the quartz sand of 1000 kg,the steel fiber of 176 kg,the powder water reducer of 8.8 kg.Under this mix ratio,the water demand of UHPC concrete is only 7.22%of the total solid mass.

关 键 词：超高性能混凝土 干粉料 力学性能 工作性能 

分 类 号：TU528[建筑科学—建筑技术科学]