不同制备工艺对钢纤维混凝土性能影响的试验研究  

Experimental Study on the Effects of Different Production Processes on the Performance of Steel Fiber Reinforced Concrete

作　　者：王剑宏 于博翔 夏志鹏 杨华 孙会彬 WANG Jian-hong;YU Bo-xiang;XIA Zhi-peng;YANG Hua;SUN Hui-bin(School of Qilu Transportation,Shandong University,Jinan 250002,China;School of Transportation Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东大学齐鲁交通学院,济南250002 [2]山东建筑大学交通工程学院,济南250101

出　　处：《科学技术与工程》2024年第9期3789-3796,共8页Science Technology and Engineering

基　　金：国家自然科学基金重点项目(2021YFB2600800,2022YFE0104300);国家自然科学基金面上项目(52178390)。

摘　　要：钢纤维混凝土可起到减少混凝土开裂、提高结构韧性等作用,已逐渐被应用于隧道衬砌支护。但制备工艺决定了钢纤维在混凝土基体中的分布,从而严重影响钢纤维混凝土性能,因此亟须开展针对钢纤维分布与制备工艺之间关系的研究。从实际工程出发,选用6种钢纤维混凝土制备工艺,浇筑了18根梁试件,开展钢纤维混凝土抗弯性能试验。试验结果表明,使用MT1制备工艺的端钩型钢纤维混凝土在破坏位置、钢纤维分布、钢纤维外露角度、外露长度、抗弯强度等方面均表现出良好性能。Steel fiber reinforced concrete with merits of reducing concrete cracking and improving structural toughness etc.,has gradually been applied in tunnel lining support.However,the structural performance of steel fiber reinforced concrete greatly depends on the distribution of steel fibers in the concrete matrix significantly affected by the production process.Therefore,it is urgent to conduct research on the relationship between the steel fiber distribution and the production process.Starting from the actual project,six kinds of steel fiber reinforced concrete preparation technology were selected,and 18 beam specimens were poured to carry out the flexural performance test of steel fiber reinforced concrete.The test results show that the end hook steel fiber reinforced concrete prepared by MT1 has good performance in terms of damage location,steel fiber distribution,exposed angle,exposed length and bending strength.

关 键 词：钢纤维混凝土 抗弯性能 纤维分布 制备工艺 投料顺序 工程应用 

分 类 号：TU528.572[建筑科学—建筑技术科学]