摘要
为研究纤维(钢纤维、聚丙烯纤维、玻璃纤维)在不同体积率下对蒸养再生混凝土抗渗性能的影响。设置3种纤维(钢纤维、聚丙烯纤维、玻璃纤维)的体积率均为0、0.5%、1.0%、1.5%,主要从微观和宏观两个方面阐述不同体积率的纤维对蒸养再生混凝土抗渗性能的影响规律。试验结果表明:从微观角度分析混凝土包裹着纤维,混凝土与纤维之间有一定的黏结性,纤维能够打断混凝土内部的裂缝结构,从而抑制裂缝的开展;从宏观角度分析当纤维(钢纤维、聚丙烯纤维、玻璃纤维)体积率为1.0%孔隙率最小且抗渗性能最佳。相比于未掺入纤维的再生混凝土,纤维(钢纤维、聚丙烯纤维、玻璃纤维)体积率为1.0%的再生混凝土孔隙率分别降低了5.06%、6.09%、11.80%;相比于未掺入纤维的再生混凝土,纤维(钢纤维、聚丙烯纤维、玻璃纤维)体积率为1.0%的再生混凝土抗渗性能分别提高了18.50%、25.33%、34.41%;初步确定不同种类纤维再生混凝土孔隙率与渗透高度的关系式。
To study the influence of fibers(steel fiber,polypropylene fiber,glass fiber)on the impermeability of steam-cured recycled concrete under different volume ratios.In this experiment,the volume rate of three fibers(steel fiber,polypropylene fiber,glass fiber)is set to 0,0.5%,1.0%,1.5%,mainly from the micro and macro aspects of the influence law of the impermeability of recycled concrete.The results showed that analyze from a microscopic perspective that the concrete is wrapped with fibers,and there is a certain bond between the concrete and the fibers.The fibers can break the crack structure inside the concrete,thereby inhibiting the development of cracks.From a macro perspective,when the volume rate of fibers(steel fiber,polypropylene fiber,glass fiber)is 1.0%,the porosity is the smallest and the impermeability is the best.Compared with recycled concrete without fiber,the porosity of recycled concrete with fiber(steel fiber,poly-propylene fiber,glass fiber)volume ratio of 1.0%is reduced by 5.06%,6.09%,and 11.80%respectively.Compared with recycled concrete without fiber,the impermeability of recycled concrete with fiber(steel fiber,polypropylene fiber,glass fiber)volume ratio of 1.0%increased by 18.50%,25.33%,and 34.41%,respectively.Preliminarily determine the relationship between porosity and penetration height of different types of fiber recycled concrete.
作者
杨文瑞
袁娇
黎惠莹
冯中敏
全伟杰
YANG Wenrui;YUAN Jiao;LI Huiying;FENG Zhongmin;QUAN Weijie(School of Civil and Architectural Engineering,East China University of Technology,Nanchang 330012,China)
出处
《混凝土》
CAS
北大核心
2022年第10期67-70,74,共5页
Concrete
基金
国家自然科学基金(51178361)
江西省自然科学基金(20181BAB216027)
江西省教育厅科技计划项目(GJJ170486)
博士启动金(DHBK2017119)。
关键词
纤维再生混凝土
蒸养
抗渗性能
孔隙率
fiber recycled concrete
steam culture
impermeability
porosity
