文献类型：期刊文献

英文题名：Effect of Fiber Content on Mechanical Properties and Microstructural Characteristics of Alkali Resistant Glass Fiber Reinforced Concrete

作者：Wu, Chao He, Xiongjun Zhao, Xia He, Li Song, Yuan Zhang, Xiuyan

第一作者：Wu, Chao

通信作者：Zhao, X[1]

机构：[1]Wuhan Univ Technol, Sch Transportat & Logist Engn, Wuhan 430063, Peoples R China;[2]Hubei Prov Highway Engn Res Ctr, Wuhan 430063, Peoples R China;[3]Univ Lisbon, CERIS, Inst Super Tecn, P-1049001 Lisbon, Portugal;[4]Binzhou Polytech, Binzhou 256603, Peoples R China;[5]Guizhou Inst Technol, Sch Civil Engn, Guiyang 550003, Peoples R China;[6]Hubei Commun Planning & Design Inst Co Ltd, Wuhan 430051, Peoples R China

第一机构：Wuhan Univ Technol, Sch Transportat & Logist Engn, Wuhan 430063, Peoples R China

通信机构：corresponding author), Binzhou Polytech, Binzhou 256603, Peoples R China.

年份：2022

卷号：2022

外文期刊名：ADVANCES IN MATERIALS SCIENCE AND ENGINEERING

收录：;EI(收录号：20225013222830);Scopus(收录号：2-s2.0-85143434613);WOS:【SCI-EXPANDED(收录号:WOS:000893506900002)】；

基金：AcknowledgmentsThe authors may wish to express their sincere appreciation for the financial support provided by the National Key Research and Development Program of China (No. 2017YFC0806008), National Natural Science Foundation of China (No. 51178361), Science and Technology Project of Department of Transportation of Hubei Province (Nos. 2018-422-1-2, 2022-11-2-8), Major Project of Technological Innovation of Hubei Province (No. 2018AAA031), China Scholarship Council (No. 201906950026), and the Fundamental Research Funds for the Central Universities (No. 2019-YB-015) for this work.

语种：英文

外文关键词：Ductility - Energy dispersive spectroscopy - Glass fibers - Reinforced concrete - Scanning electron microscopy

摘要：Owing to its enhanced strength, ductility, and resistance to harsh environments, increasing research attention has been paid to alkali-resistant glass fiber reinforced concrete (ARGFRC). This paper presents experimental studies concerning the effects of fiber content on the mechanical properties and microstructural characteristics of ARGFRC. The amount of glass fiber was considered at levels of 0.0, 0.3, 0.5, 0.8, 1.0, 1.3, and 1.5% of the concrete volume. The compression, flexural, impact resistance, scanning electron microscopy, and energy dispersive spectroscopy tests were conducted. The flexural load-deflection curve, flexural strength, flexural toughness index, flexural fracture energy, postcracking stiffness, postpeak stiffness, and impact resistance energy absorption were obtained. Then the changing law affected by fiber content on these mechanical properties was further analyzed, and the corresponding equation was fitted. When fiber content was 1.5%, the flexural toughness index I-5, I-10, and I-20 values were 4.0, 5.9, and 8.9, respectively, and increased by 3.0 similar to 7.9 times. Glass fiber incorporation could increase the ductility and delay the brittle failure when the fiber content reached 0.8%. The largest postcracking stiffness was calculated at 36.174 kN/mm with a fiber content of 0.8%. The higher the fiber content, the larger the postpeak stiffness of the tested beams. Impact resistance test results demonstrated that the optimum fiber content was 1.3%. As the fiber content increased, the effect of the concrete grout on the fiber packaging decreased, according to the scanning electron microscopy analysis. The energy dispersive spectroscopy observation proved that adding a certain fiber content did not affect the concrete hydration reaction.