Research on Flexural Properties of Reinforced Truss Spontaneous-Combustion Coal Gangue Concrete Composite Slabs

WANG Qing-he; LIU Yu-ting; XU Di-shun; ZHANG Li-jia; ZHOU Zhang-qun

doi:10.13204/j.gyjzG22032906

Volume 52 Issue 9

Sep. 2022

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Citation:

WANG Qing-he, LIU Yu-ting, XU Di-shun, ZHANG Li-jia, ZHOU Zhang-qun. Research on Flexural Properties of Reinforced Truss Spontaneous-Combustion Coal Gangue Concrete Composite Slabs[J]. INDUSTRIAL CONSTRUCTION, 2022, 52(9): 67-73,93. doi: 10.13204/j.gyjzG22032906

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Research on Flexural Properties of Reinforced Truss Spontaneous-Combustion Coal Gangue Concrete Composite Slabs

doi: 10.13204/j.gyjzG22032906

1. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
2. Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin 150090, China;
3. China Construction Second Engineering Bureau Ltd., Beijing 110000, China

Received Date: 2022-03-29
Available Online: 2023-02-06

Abstract

Abstract

Coal gangue is a typical kind of solid waste produced during the process of coal mining, and crushing it to replace natural aggregate in concrete can realize its recycling. To study the flexural properties of reinforced truss spontaneous-combustion coal gangue aggregate concrete (RTSCGAC) composite slab, the finite element model of RTSCCGA composite slab was established by using ABAQUS software, and the reliability of the model was verified by the load-deflection and load-stiffness results from 8 groups of full-scale specimens; a parametric study was conducted and the influence of replacement ratio of spontaneous-combustion coal gangue aggregate (SCGA) on the flexural properties (flexural capacity and flexural stiffness) of RTSCGAC composite slab was quantified; based on the results of parametric analysis, the existing code design methods were reviewed. The results showed that the flexural properties of RTSCGAC composite slab decreased with the incorporation of SCGA, and the ultimate bearing capacity was slightly affected by the replacement ratio of SCGA. When the replacement ratio was 100%, the bending moment was only reduced by 0.15%~0.69%, while the flexural stiffness decreased by 30.65%~30.99%; Code for Design of Concrete Structures (GB 50010—2017) could be used for predicting the flexural stiffness of RTSCGAC composite slabs.
- reinforced truss concrete composite slab,
- spontaneous-combustion coal gangue,
- flexural properties,
- finite element analysis,
- design procedure

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References(21)

References

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