纳米级掺合料粗合成纤维湿喷混凝土施工及抗裂性能分析  

Shootability and Crack Resistance Analysis of Wet Mix Shotcrete with Nanometer Scale Admixture and Macro Synthetic Fiber

作　　者：宁逢伟[1] 丁建彤[2] 陈波[1] 杨森[2] 胡海明[1] 

机构地区：[1]南京水利科学研究院水文水资源与水利工程科学国家重点实验室,江苏南京210029 [2]中国水利水电第七工程局有限公司,四川成都611730

出　　处：《水电能源科学》2017年第2期123-126,共4页Water Resources and Power

基　　金：国家重点研发计划课题(2016YFC0401610);江苏省自然科学基金项目(BK20151072);中央级公益性科研院所基本科研业务费专项资金项目(Y416003);中国水利水电第七工程局有限公司项目(2015-458-20)

摘　　要：为考察纳米级掺合料粗合成纤维湿喷混凝土的施工及抗裂性能,开展了凝结时间、回弹率、抗压强度、干缩、平板开裂和温度应力试验,并将其与同配制强度的硅粉钢纤维湿喷混凝土进行比较。结果表明,与硅粉钢纤维湿喷混凝土相比,纳米级掺合料粗合成纤维湿喷混凝土的凝结时间变化不大;回弹率下降了27%;1d抗压强度提高了45%;干缩测值接近,平板总开裂面积降低,温度应力开裂时间延长,开裂敏感性降低。To evaluate properties of shootability and crack resistance of wet mix shotcrete（WMS）with nanometer scale admixture（NSA）and macro synthetic fiber（MSF）,setting time,rebound rate,compressive strength,drying shrinkage,slab cracking and temperature stress tests of WMS were done.The WMS with NSA and MSF,WMS containing silica fume and steel fiber were compared with each other.The results show that the setting time has almost no difference;rebound rate decreases by 27%;one-day compressive strength improves by 45%;drying shrinkage is nearly the same;slab total areas of cracking decrease;temperature stress cracking time extends;cracking sensitivity decreases.

关 键 词：湿喷混凝土 纳米级掺合料 粗合成纤维 施工性能 抗裂性 

分 类 号：TU528[建筑科学—建筑技术科学] TV544.923[水利工程—水利水电工程]