中文 | English
Hefei University of Technology Logo J. Hefei Univ. Tech. (Nat. Sci.)

Navigation

Investigation on mechanical and fracture properties of concrete reinforced with basalt fiber in different types

Download Full Text

不同类型玄武岩纤维混凝土力学和断裂性能研究

Journal Information

J. Hefei Univ. Tech. (Nat. Sci.), Aug. 2026, Vol. 49 No. 8: 1081-1088

DOI: 10.3969/j.issn.1003-5060.2026.08.012

Authors

HUANG Jingting $ ^{1} $, LI Shijin $ ^{1} $, SHEN Kaifeng $ ^{1} $, CHU Shengjie $ ^{2} $, HUANG Junqi $ ^{2} $

(1. School of Intelligent Construction and Transportation Engineering, Hefei University, Hefei 230601, China; 2. School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract and Keywords

Abstract: In order to study the mechanical and fracture properties of basalt fiber reinforced concrete (BFRC) of different types, the bundled and chopped basalt fibers (BFs) were used as reinforcing materials, and the concrete with coarse aggregate gradations of 5-10 mm and 16-20 mm, as well as 5-10 mm and 16-25 mm, was investigated. The cubic compressive strength, splitting tensile strength and prenotched three-point bending tests were carried out. The microstructure mechanism was analyzed by scanning electron microscope (SEM). The results show that the addition of BF significantly improves the splitting tensile strength, initial fracture toughness, unstable fracture toughness and fracture energy of concrete, but its compressive strength generally exhibits a downward trend. The compressive strength and split tensile strength of the bundled BFRC specimens are larger than those of the corresponding chopped BFRC specimens, demonstrating a better reinforcing effect of bundled BF on the strength properties of concrete. Moreover, the bundled BF has a better improvement effect on the unstable fracture toughness and fracture energy of concrete, and the values of the two indicators of the bundled BFRC specimens are 1.4 and 1.8 times higher than those of the chopped BFRC specimen. mens, respectively. However, the chopped BF shows a higher increment effect on the initial fracture toughness of concrete compared with the bundled BF, with the maximum increase reaching 8.7%. When the maximum coarse aggregate particle size increases from 20 mm to 25 mm, the compressive strength, unstable fracture toughness and fracture energy of the BFRC specimens present a rising trend, indicating that the specimens with larger coarse aggregate particle sizes have better mechanical and fracture properties. It can be concluded that the large-diameter bundled BF exhibits the best overall enhancing effect on the various properties of concrete with larger aggregate particle sizes.

Keywords: bundled basalt fiber; chopped basalt fiber; concrete; coarse aggregate gradation; mechanical property; fracture toughness

作者信息

黄镜淳 $ ^{1} $，李仕进 $ ^{1} $，沈凯峰 $ ^{1} $，储圣洁 $ ^{2} $，黄俊旗 $ ^{2} $

(1. 合肥大学 智能建造与交通工程学院, 安徽 合肥 230601; 2. 合肥工业大学 土木与水利工程学院, 安徽 合肥 230009)

摘要和关键词

摘要: 为研究不同类型玄武岩纤维混凝土(basalt fiber reinforced concrete, BFRC)的力学和断裂性能,文章分别采用束状和短切玄武岩纤维(basalt fiber, BF)作为增强材料,对粗骨料级配为5~10 mm、16~20 mm和5~10 mm、16~25 mm的混凝土开展了立方体抗压、劈裂抗拉和缺口梁三点弯曲试验,且通过扫描电子显微镜(scanning electron microscope, SEM)分析其微观机理。结果表明:掺入BF后,混凝土的劈裂抗拉强度、起裂韧度、失稳韧度和断裂能均有较明显提高,但其抗压强度则多呈下降趋势;束状BFRC试件的抗压和劈拉强度均大于相应短切BFRC试件,展现出束状BF对混凝土强度性能较好的增强效果,且束状BF较短切BF对混凝土的失稳韧度和断裂能的改善效果也更优,两项指标值分别为短切BFRC试件的1.4、1.8倍,但短切BF较束状BF对混凝土的起裂韧度呈现更高的提升效果,增幅最大至8.7%;随着最大粗骨料粒径由20 mm增至25 mm时,BFRC试件抗压强度、失稳韧度和断裂能均呈现上升趋势,显示出较大粗骨料粒径的试件具有较好的力学和断裂性能。该结果说明大直径的束状BF对较大骨料粒径混凝土各项性能的整体增强效果最佳。

关键词: 束状玄武岩纤维；短切玄武岩纤维；混凝土；粗骨料级配；力学性能；断裂韧性

Funding

国家自然科学基金资助项目（52208158）；安徽省高校重点自然科学研究资助项目（2022AH051805）；合肥大学一流课程资助项目（2024HFUTXSXX07）和合肥大学人才科研基金资助项目（21-22RC38）

Previous Next
Back to Contents

Account

Submission Login Reviewer Login Editor Login