玄武岩-聚丙烯混杂纤维轻骨料混凝土强度研究  

Strength study of basalt-polypropylene hybrid fiber lightweight aggregate concrete

作　　者：刘胜兵 梅浩华 黄依莹 郑宇航 冯文奇 雷世杰 LIU Shengbing;MEI Haohua;HUANG Yiying;ZHENG Yuhang;FENG Wenqi;LEI Shijie(School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan 430074,China;China Construction Third Engineering Group(Shenzhen)Co.,Ltd.,Shenzhen 518000,China;Wuhan Hanyang Municipal Construction Group Co.,Ltd.,Wuhan 430050,China)

机构地区：[1]武汉工程大学土木工程与建筑学院,湖北武汉430074 [2]中建三局集团(深圳)有限公司,广东深圳518000 [3]武汉市汉阳市政建设集团有限公司,湖北武汉430050

出　　处：《武汉大学学报（工学版）》2024年第12期1725-1732,共8页Engineering Journal of Wuhan University

基　　金：湖北省教育厅科学研究计划项目(编号:B2015313);武汉工程大学研究生教育创新基金项目(编号:CX2021125)。

摘　　要：为研究玄武岩-聚丙烯混杂纤维对轻骨料混凝土强度的影响,在轻骨料混凝土中单掺或混掺不同体积率的玄武岩、聚丙烯纤维,进行立方体抗压强度试验和劈裂抗拉强度试验,引入纤维混杂系数,探讨了纤维体积率、纤维混杂效应对轻骨料混凝土强度的影响,并结合自适应神经模糊推理系统(adaptive network-based fuzzy inference system,ANFIS)对立方体抗压强度进行了预测。结果表明:单掺玄武岩纤维与聚丙烯纤维对轻骨料混凝土立方体抗压强度及劈裂抗拉强度最大分别可提高24.0%、7.7%与13.9%、26.9%,混掺玄武岩-聚丙烯纤维对基体劈裂抗拉强度提高可达30.77%,对抗压强度的提高效果不佳。玄武岩-聚丙烯混杂纤维对抗压强度呈负混杂效应,对劈裂抗拉强度表现出正混杂效应,且明显改善了轻骨料混凝土的脆性。建立的ANFIS模型具有较高的预测精度,验证了基于ANFIS的玄武岩-聚丙烯混杂纤维轻骨料混凝土强度预测的可靠性。To study the influence of basalt-polypropylene hybrid fiber on the strength of lightweight aggregate concrete,the cubic compressive strength test and splitting tensile strength test were carried out by adding basalt fiber and polypropylene fiber of different volume ratio mixed or alone in lightweight aggregate concrete.The fiber hybrid coefficient was introduced to explore the influence of fiber volume ratio and fiber hybrid effects on the strength of lightweight aggregate concrete.The adaptive network-based fuzzy inference system(ANFIS)was utilized to predict the compressive strength of the cube.The results show that the maximum compressive strength and splitting tensile strength of lightweight aggregate concrete cube can be increased by 24.0%,7.7%and 13.9%,26.9%,respectively by adding basalt fiber and polypropylene fiber alone.The splitting tensile strength of the matrix can be increased by up to 30.77%by mixed basalt and polypropylene fiber,but the improvement effect on the compressive strength is not good.The basalt-polypropylene hybrid fiber obviously improves the brittleness of lightweight aggregate concrete,while it has negative and positive hybrid effects on the compressive strength and the splitting tensile strength,respectively.The established ANFIS model has high prediction accuracy,which verifies the reliability of the strength prediction of basalt-polypropylene hybrid fiber reinforced lightweight aggregate concrete based on ANFIS.

关 键 词：混杂纤维 轻骨料混凝土 混杂效应 自适应神经模糊推理系统 强度预测 

分 类 号：TU528[建筑科学—建筑技术科学]