纤维增强复合材料约束尾矿粉地聚物再生混凝土轴压性能研究

毛志杰; 黄靓; 吴越; 曾令宏; 邓鹏; 李隐

doi:10.13204/j.gyjzG22061601

纤维增强复合材料约束尾矿粉地聚物再生混凝土轴压性能研究

doi: 10.13204/j.gyjzG22061601

毛志杰^1,2,
黄靓^1, ,,
吴越^1,3,
曾令宏¹,
邓鹏¹,
李隐¹

1. 湖南大学土木工程学院, 长沙 410082;
2. 广州市住房城乡建设行业监测与研究中心, 广州 510000;
3. 湖州市人防工程质量监督站, 浙江湖州 313000

基金项目:

工信部课题(TC210H029)。

国家重点研发计划项目(2019YFC1904700)

详细信息

作者简介:
毛志杰,男,1996年出生,硕士。

通讯作者:
黄靓,男,1974年出生,博士,教授,huangliangstudy@126.com。

计量
- 文章访问数: 95
- HTML全文浏览量: 13
- PDF下载量: 1
- 被引次数: 0
出版历程
- 收稿日期: 2022-06-16
- 网络出版日期: 2023-08-18

Research on Mechanical Properties of FRP-Constrained Geopolymeric Recycled Concrete Mixed with Tailing Powder Under Axial Compression

MAO Zhijie^1,2,
HUANG Liang^{1
, ,},
WU Yue^1,3,
ZENG Linghong¹,
DENG Peng¹,
LI Yin¹

1. College of Civil Engineering, Hunan University, Changsha 410082, China;
2. Guangzhou Municipal Housing and Urban-Rural Construction Industry Monitoring and Research Center, Guangzhou 510000, China;
3. Huzhou Civil Air Defense Engineering Quality Supervision Station, Huzhou 313000, China

摘要

摘要: 针对再生骨料强度和延性较低、尾矿资源化利用率较低、地聚物混凝土较脆等缺陷,通过采用纤维增强复合材料(FRP)对混凝土进行约束用来改善其强度和延性等力学性能,并提高资源化利用率。因此,以FRP类型、FRP层数、核心混凝土轴心强度等级为变量设计了14组共计42个试件,对FRP约束尾矿粉地聚物再生混凝土(FRP-GRC-TP)的轴压性能进行了试验研究和理论模型分析。结果表明:核心混凝土的强度和延性显著提高,FRP层数越多,增强作用越强,且FRP约束低强度等级混凝土的增强效果更加明显。提出的2个建议拟合强度模型和1个建议拟合极限应变模型的理论计算值与试验值误差较小,对FRP约束尾矿粉地聚物再生混凝土的强度和极限应变的预测精准度高。
- FRP /
- 地聚物再生混凝土 /
- 尾矿粉 /
- 轴压性能 /
- 理论模型
Abstract: Aiming at the defects of low strength and ductility of recycled aggregate, low utilization rate of tailings and relative brittleness of geopolymer concrete, fiber reinforced polymer (FRP) was adopted to restraint concrete for enhancing the utilization rate of resources and ameliorating the mechanical properties such as strength and ductility. Therefore, taking the type of FRP, the number of FRP layers and the axial strength grade of core concrete as variables, a total of 42 specimens in 14 groups were designed to carry out axial compressive performance test research and theoretical model analysis of FRP-constrained geopolymeric recycled concrete mixed with tailing powder (FRP-GRC-TP) in the paper. The results showed that the FRP-GRC-TP composite structure significantly improved the strength and ductility of core concrete, and the more layers of FRP, the stronger the enhancement effect. In addition, the enhancement effect of FRP-constrained low-strength concrete was more obvious. The two suggested fitting strength models and one suggested fitting limit strain model proposed in the study had small errors between theoretical calculated values and experimental values, and showed a high prediction accuracy for the strength and ultimate strain of FRP-GRC-TP.
- FRP /
- geopolymeric recycled concrete /
- tailing powder /
- axial compressive performance /
- theoretical model

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