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用于结构修复的混杂纤维增强混凝土的力学试验

Mechanical Experiments on Concrete with Hybrid Fiber Reinforcement for Structural Rehabilitation.

作者信息

Shahid Muhammad Asharib, Rashid Muhammad Usman, Ali Nazam, Chaiyasarn Krisada, Joyklad Panuwat, Hussain Qudeer

机构信息

Civil Engineering Department, University of Management and Technology, Lahore 54770, Pakistan.

Thammasat Research Unit in Infrastructure Inspection and Monitoring, Repair and Strengthening (IIMRS), Thammasat School of Engineering, Faculty of Engineering, Thammasat University Rangsit, Pathum Thani 12000, Thailand.

出版信息

Materials (Basel). 2022 Apr 12;15(8):2828. doi: 10.3390/ma15082828.

DOI:10.3390/ma15082828
PMID:35454521
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9032813/
Abstract

Reinforced concrete is used in the construction of bridges, buildings, retaining walls, roads, and other engineered structures. Due to seismic activities, a lot of structures develop seismic cracks. The rehabilitation of such structures is necessary for public safety. The overall aim of this research study was to produce a high-performance hybrid fiber-reinforced concrete (HPHFRC) with enhanced properties as compared to plain high-performance concrete and high-performance fiber-reinforced concrete (HPFRC) for the rehabilitation of bridges and buildings. Kevlar fibers (KF) and glass fibers (GF) with lengths of 35 mm and 25 mm, respectively, were added and hybridized to 1.5% by mass of cement to create hybrid fiber-reinforced concrete mixes. Eight mixes were cast in total. The compressive strength ('), flexural strength (), splitting tensile strength (), and other mechanical properties, i.e., energy absorption and toughness index values, were enhanced in HPHFRC as compared to CM and HPFRC. It was found that the concrete hybridized with 0.75% KF and 0.75% GF (HF-G 0.75 K 0.75) had the most enhanced overall mechanical properties, illustrating its potential to be utilized in the rehabilitation of bridges and structures.

摘要

钢筋混凝土用于桥梁、建筑物、挡土墙、道路及其他工程结构的建设。由于地震活动，许多结构会出现地震裂缝。为了公共安全，修复此类结构很有必要。本研究的总体目标是制备一种高性能混杂纤维增强混凝土（HPHFRC），与普通高性能混凝土和高性能纤维增强混凝土（HPFRC）相比，其性能有所增强，用于桥梁和建筑物的修复。分别添加长度为35毫米和25毫米的凯夫拉纤维（KF）和玻璃纤维（GF），并按水泥质量的1.5%进行混杂，以制备混杂纤维增强混凝土混合料。总共浇筑了八种混合料。与普通混凝土（CM）和高性能纤维增强混凝土（HPFRC）相比，高性能混杂纤维增强混凝土（HPHFRC）的抗压强度（'）、抗折强度（）、劈裂抗拉强度（）以及其他力学性能，即能量吸收和韧性指数值均有所提高。研究发现，与0.75%的KF和0.75%的GF混杂的混凝土（HF - G 0.75 K 0.75）具有最优异的综合力学性能，表明其在桥梁和结构修复中的应用潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/adf7f2bcb688/materials-15-02828-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/58b2bc1241bd/materials-15-02828-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/b510dc9c9d7d/materials-15-02828-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/41becbdeff91/materials-15-02828-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/8b9cd7e992b8/materials-15-02828-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/3957a2943791/materials-15-02828-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/6a546e93c0da/materials-15-02828-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/e43ff4f83479/materials-15-02828-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/1186f6da460b/materials-15-02828-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/a8cbbc4b31b6/materials-15-02828-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/06c195e46900/materials-15-02828-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/0a6800e206aa/materials-15-02828-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/7778f659ee49/materials-15-02828-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/7f29ab64c941/materials-15-02828-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/adf7f2bcb688/materials-15-02828-g013.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/58b2bc1241bd/materials-15-02828-g014.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/b510dc9c9d7d/materials-15-02828-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/41becbdeff91/materials-15-02828-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/8b9cd7e992b8/materials-15-02828-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/3957a2943791/materials-15-02828-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/6a546e93c0da/materials-15-02828-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/e43ff4f83479/materials-15-02828-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/1186f6da460b/materials-15-02828-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/a8cbbc4b31b6/materials-15-02828-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/06c195e46900/materials-15-02828-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/0a6800e206aa/materials-15-02828-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/7778f659ee49/materials-15-02828-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/7f29ab64c941/materials-15-02828-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1d88/9032813/adf7f2bcb688/materials-15-02828-g013.jpg

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本文引用的文献

1
Mechanical Properties of Ultra-High Performance Concrete before and after Exposure to High Temperatures.高温作用前后超高性能混凝土的力学性能
Materials (Basel). 2020 Feb 7;13(3):770. doi: 10.3390/ma13030770.