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耐碱玻璃纤维增强珊瑚骨料混凝土的性能

Properties of Alkali-Resistant Glass Fiber Reinforced Coral Aggregate Concrete.

作者信息

Yang Shutong, Yu Miao, Dong Kun, Yang Yushan

机构信息

Department of Civil Engineering in College of Engineering, Ocean University of China, Qingdao 266100, China.

Cooperative Innovation Center of Engineering Construction and Safety in Shandong Blue Economic Zone, Qingdao University of Technology, Qingdao 266033, China.

出版信息

Materials (Basel). 2020 Aug 5;13(16):3450. doi: 10.3390/ma13163450.

DOI:10.3390/ma13163450
PMID:32764396
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7475914/
Abstract

The intention of this paper is to analyze the properties of coral aggregate concrete (CAC) that is reinforced by alkali-resistant glass fibers (ARGF) and the bond performance with BFRP (basalt fiber reinforced polymer) bars. Two types of ARGF, denoted by Type A and Type B with different manufacturing technologies and fiber lengths, are used in the test. Tests of compressive strength, splitting tensile strength, and flexural performance were performed on ARGF-CAC with four different contents for the two types of ARGF. It is found that the cubic compressive strength is slightly reduced when the fiber volume fraction exceeds 0.5%, but almost keeps invariable if the fiber content further increases. However, the tensile strength, residual strength retention and flexural toughness are improved as more ARGFs are added into CAC, and even higher with Type B ARGF addition. The optimized volume fraction is 1.5% for both the two types of ARGF based on the evaluation of the workability and mechanical performance. Moreover, central pull-out test was performed to study the bond properties of ARGF-CAC with BFRP bars. It is found that both the maximum average bond stress and residual frictional stress are generally reduced as the bond length is longer. The addition of Type B ARGFs can significantly improve the bond strength; however, the Type A ARGFs seem to have marginal effect.

摘要

本文旨在分析由耐碱玻璃纤维（ARGF）增强的珊瑚骨料混凝土（CAC）的性能以及与玄武岩纤维增强聚合物（BFRP）筋的粘结性能。试验中使用了两种不同制造工艺和纤维长度的耐碱玻璃纤维，分别记为A型和B型。对两种耐碱玻璃纤维、四种不同含量的ARGF-CAC进行了抗压强度、劈裂抗拉强度和弯曲性能测试。研究发现，当纤维体积分数超过0.5%时，立方体抗压强度略有降低，但纤维含量进一步增加时，抗压强度几乎保持不变。然而，随着更多的耐碱玻璃纤维加入到珊瑚骨料混凝土中，抗拉强度、残余强度保持率和弯曲韧性均有所提高，加入B型耐碱玻璃纤维时提高得更高。基于工作性能和力学性能的评估，两种耐碱玻璃纤维的最佳体积分数均为1.5%。此外，进行了中心拉拔试验以研究ARGF-CAC与BFRP筋的粘结性能。研究发现，随着粘结长度的增加，最大平均粘结应力和残余摩擦应力通常都会降低。加入B型耐碱玻璃纤维可显著提高粘结强度；然而，A型耐碱玻璃纤维似乎影响甚微。

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A Statistical Damage Constitutive Model Based on the Weibull Distribution for Alkali-Resistant Glass Fiber Reinforced Concrete.基于威布尔分布的耐碱玻璃纤维增强混凝土统计损伤本构模型
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