纤维混凝土抗裂防渗性能的试验研究  

Experimental Study on Crack and Seepage Resistance of Fiber Reinforced Concrete

作　　者：李文涛[1] LI Wentao(Xinjiang Water Resources and Hydropower Survey,Design and Research Institute CO.LTD.,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院有限责任公司,新疆乌鲁木齐830000

出　　处：《河南水利与南水北调》2022年第9期93-94,共2页Henan Water Resources & South-to-North Water Diversion

摘　　要：为进一步探索引水隧洞纤维混凝土抗裂防水性能的基本特征,选取某引水隧洞工程为典型案例,根据隧洞内外侧环境条件及混凝土开裂和渗透情况,开展抗渗试验。分析掺入不同材料的复合混凝土的抗冲击性能和抗渗性能,对钢纤维、碳纤维及复合纤维混凝土开展抗冲击和抗渗耐久性试验。试验结果表明,与未掺料混凝土对比分析,混合材料混凝土的韧性显著提高,结构的抗裂性能明显增强。渗透试验结果也表明,三种不同掺合料的混凝土试样中,掺杂复合纤维的试样渗透系数最小,证明该种掺和纤维对于提高混凝土的抗渗能力是较好的。试验研究结果对类似工程建设具有科学的参考和借鉴作用。In order to further explore the basic characteristics of the crack resistance and waterproof performance of fiber concrete in headrace tunnel, a headrace tunnel project is selected as a typical case. The impermeability test is carried out according to the environmental conditions inside and outside the tunnel and the concrete cracking and permeability. The impact resistance and impermeability of composite concrete mixed with different materials are analyzed. The impact resistance and impermeability durability tests of steel fiber, carbon fiber and composite fiber concrete are carried out. The test results show that the toughness of concrete with mixed materials is significantly improved and the crack resistance of the structure is significantly enhanced compared with that of concrete without admixtures. The permeability test results also show that among the concrete samples with three different admixtures, the permeability coefficient of the sample doped with composite fiber is the smallest, which proves that this kind of mixed fiber is better for improving the impermeability of concrete. The results of the test and research can be used as a scientific reference for similar engineering construction.

关 键 词：引水隧洞 纤维混凝土 渗透试验 抗冲击试验 试验研究 

分 类 号：TU21[建筑科学—建筑设计及理论]