Experimental Study and Analysis-Oriented Model of FRP-Confined Coal Gangue Aggregate Concrete

LI Xinyu; WANG Zeyuan; LIU Lihao; YANG Jiaqi; FENG Peng

doi:10.3724/j.gyjzG25073102

Volume 55 Issue 10

Oct. 2025

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LI Xinyu, WANG Zeyuan, LIU Lihao, YANG Jiaqi, FENG Peng. Experimental Study and Analysis-Oriented Model of FRP-Confined Coal Gangue Aggregate Concrete[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(10): 86-93. doi: 10.3724/j.gyjzG25073102

Citation:

LI Xinyu, WANG Zeyuan, LIU Lihao, YANG Jiaqi, FENG Peng. Experimental Study and Analysis-Oriented Model of FRP-Confined Coal Gangue Aggregate Concrete[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(10): 86-93. doi: 10.3724/j.gyjzG25073102

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Experimental Study and Analysis-Oriented Model of FRP-Confined Coal Gangue Aggregate Concrete

doi: 10.3724/j.gyjzG25073102

1. School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China;
2. National Center of Technology Innovation for Green and Low-Carbon Building, Beijing 100088, China;
3. China Coal Technology Engineering Group, Beijing 100013, China;
4. Department of Civil Engineering, Tsinghua University, Beijing 100084, China

Received Date: 2025-07-31
Publish Date: 2025-10-31

Abstract

Abstract

Coal gangue， a solid byproduct continuously generated during mining operations， can be utilized to replace natural aggregates in concrete， forming coal gangue aggregate concrete （CGAC）. This application addresses the environmental pollution caused by gangue stockpiling and mitigates the scarcity of natural aggregates. To compensate for the reduction in the mechanical properties of concrete resulting from replacing conventional aggregates with coal gangue， fiber-reinforced polymer （FRP） confinement can be employed to enhance the axial compressive strength of CGAC. In this study， the effects of three parameters were investigated： the coal gangue replacement ratio by volume （0% and 50%）， the FRP fabric type （glass fiber and carbon fiber）， and the number of FRP confinement layers （1 to 6 layers）. A total of eighteen specimens were tested under axial compression to compare the stress-strain relationships of CGAC confined with different types of FRP. Experimental results indicated that FRP-confined CGAC exhibited characteristics similar to those of FRP-confined conventional concrete. Under sufficient confinement， the load-displacement response demonstrated a distinct two-stage ascending behavior. However， the enhancement effect on the axial compressive strength gradually diminished as the confinement stiffness increased significantly. Finally， based on the experimental findings， an analytical model for FRP-confined CGAC was developed using a three-dimensional graphical representation approach.
- coal gangue aggregate concrete,
- FRP confinement,
- experimental study,
- analysis-oriented model

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References(20)

References

[1]	DONG Z，XIA J，FAN C，et al. Activity of calcined coal gangue fine aggregate and its effect on the mechanical behavior of cement mortar[J] ，Construction and Building Materials，2015，100:63-69.
[2]	BIAN Z F，MIAO X X，LEI S G，et al. The challenges of reusing mining and mineral-processing wastes[J]. Science，2012，337（6095）:702-703.
[3]	ZHANG X，JIA L，LIU J，et al. Investigation of hydraulic-mechanical properties of paste backfill containing coal gangue-fly ash and its application in an underground coal mine[J]. Energies，2017，10（9），1309.
[4]	WANG Z，ZHAO N. Influence of coal gangue aggregate grading on strength properties of concrete[J]. Wuhan University Journal of Natural Sciences，2015，20（1）:66-72.
[5]	LI Y，LIU S，GUAN X. Multitechnique investigation of concrete with coal gangue[J]. Construction and Building Materials，2021，301，124114.
[6]	YU L L，XIA J W，XIA Z，et al. Study on the mechanical behavior and micro-mechanism of concrete with coal gangue fine and coarse aggregate[J]. Construction and Building Materials，2022，338，127626.
[7]	GAO S，ZHAO G H，GUO L H，et al. Utilization of coal gangue as coarse aggregates in structural concrete[J]. Consruction and Building Materials，2021，268，121212.
[8]	刘世，刘海卿. 煤矸石混凝土毛细吸水特性及水分分布预测[J]. 辽宁工程技术大学学报（自然科学版），2018，37（5）:804-808.
[9]	冯鹏. 复合材料在土木工程中的发展与应用[J]. 玻璃钢/复合材料，2014（9）:99-104.
[10]	WANG J，XIA J W，CHANG H F，et al. Experimental study on axial compressive behavior of gangue aggregate concrete filled FRP and thin-walled steel double tubular columns[J]. Coatings，2021，11，1404.
[11]	ZHAO H G，REN T，REMENNIKOV A. Behaviour of FRP-confined coal reject concrete columns under axial compression[J]. Composite Structures，2021，262，113621.
[12]	FARDIS M N，KHALILI H. Concrete Encased in Fiberglass-Reinforced Plastic[J]. Advances in Computers，1981，78（6）:298-302.
[13]	LAM L，TENG J G. Design-oriented stress-strain model for FRP-confined concrete[J]. Construction and Building Materials，2003，17（6）:471-489.
[14]	TENG J G，JIANG T，LAM L，et al. Refinement of a design-oriented stress-strain model for FRP-confined concrete[J]. Journal of Composites for Construction，2009，13（4）:269-278.
[15]	TENG J G，HUANG Y L，LAM L，et al. Theoretical model for fiber-reinforced polymer-confined concrete[J]. Journal of Composites for Construction，2007，11（2）:201-210.
[16]	YANG J Q，FENG P. Analysis-oriented model for FRP confined high-strength concrete:3D interpretation of path dependency[J]. Composite Structures，2021，278，114695.
[17]	YANG J Q，FENG P. Analysis-oriented models for FRP-confined concrete:3D interpretation and general methodology[J]. Engineering Structures，2020，216，110749.
[18]	赵卫平，何宇翔，江孔亮，等．煤矸石混凝土真三轴试验及破坏准则[J] ．煤炭学报，2025，50（8）:3884-3899.
[19]	金宇航. FRP约束混凝土轴压细观机理研究[D]. 北京:中国矿业大学（北京），2024.
[20]	POPOVICS S. Numerical approach to the complete stress-strain relation for concrete[J]. Cem Concer Res，1973，3（5）:583-599.