纤维戈壁混凝土单轴受压力学性能研究  

Investigation on mechanical properties of fiber reinforced Gobi concrete under uniaxial compression

作　　者：王丽[1] 张雅欣 杨德玉 王智强 廖浩宇 梁莹 陈宗平[1,2,3] WANG Li;ZHANG Yaxin;YANG Deyu;WANG Zhiqiang;LIAO Haoyu;LIANG Ying;CHEN Zongping(School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,China;Key Laboratory of Disaster Prevention and Structural Safety of Ministry of Education,Guangxi University,Nanning 530004,China;School of Architecture and Civil Engineering,Nanning University,Nanning 530200,China)

机构地区：[1]广西大学土木建筑工程学院,广西南宁530004 [2]广西大学工程防灾与结构安全教育部重点实验室,广西南宁530004 [3]南宁学院土木与建筑工程学院,广西南宁530200

出　　处：《混凝土》2025年第3期29-34,39,共7页Concrete

基　　金：广西重点研发计划项目(桂科AB21220012);八桂学者专项经费资助项目([2019]79号);广西科技基地与人才专项(桂科AD21075031);中央引导地方科技发展资金(桂科ZY21195010)。

摘　　要：为研究不同类型纤维(聚丙烯纤维、玄武岩纤维、聚丙烯纤维+玄武岩纤维)及其掺量对戈壁混凝土力学性能的影响,对纤维戈壁混凝土进行单轴受压静力加载试验,观察了试件的受力破坏过程及形态,获取了其应力-应变全过程曲线,基于试验数据深入分析了不同类型纤维对戈壁混凝土的峰值应力、峰值应变、弹性模量、轴压韧性比等力学性能的影响规律并与普通骨料混凝土进行对比分析,并通过SEM电镜扫描分析了纤维戈壁混凝土的微观结构.根据试验结果,提出纤维戈壁混凝土的力学指标计算式,结果吻合较好.试验范围内,体积掺量0.1%的混合纤维戈壁混凝土具有较好的综合性能。In order to study the effects of different types of fibers(polypropylene fiber,basalt fiber,polypropylene fiber+basalt fiber mixture)and their dosages on the mechanical properties of Gobi concrete,uniaxial compressive tests of fiber reinforced Gobi concrete were conducted.The failure process and failure mode of the specimens were observed,and the stress-strain curves were obtained.Based on experimental data,the influence of different types of fibers on the mechanical properties of Gobi concrete,such as peak stress,peak strain,elastic modulus,and axial compression toughness ratio,was analyzed in depth and compared with ordinary aggregate concrete.The microstructure of fiber reinforced Gobi concrete was also analyzed through SEM electron microscopy.Based on the experimental results,formulas for calculating the mechanical indicators of fiber reinforced Gobi concrete were provided,and the results were in good agreement.Within the test range,the polypropylene-basalt fiber Gobi concrete with the content of 0.1%has good comprehensive performance.

关 键 词：戈壁混凝土 轴压性能 纤维增强 混杂效应 线性拟合 SEM 

分 类 号：TU528.572[建筑科学—建筑技术科学]