Experimental Study of the Bending Behavior of Concrete Slabs Incorporating Coal Gasification Ash Slag

Kang Ma; Yan Gao; Ziyi Mao; Ruoyang Wu

doi:10.56748/ejse.26893

Authors

Kang Ma Hebei University of Science and Technology https://orcid.org/0000-0001-6646-317X
Yan Gao Hebei University of Science and Technology
Ziyi Mao Hebei University of Science and Technology
Ruoyang Wu Herriman

DOI:

https://doi.org/10.56748/ejse.26893

Keywords:

Coal gasification slag, Flexural performance, Concrete slabs, Compressive strength, Simulation

Abstract

This study examines the flexural behavior of concrete slabs incorporating 20% coal gasification slag (CGS) as a partial cement replacement. Experimental tests were conducted on C30, C40, and C50 grade slabs, and the results were validated through finite element analysis in ABAQUS. The findings show that CGS significantly improves the load-bearing capacity and ductility of C40 slabs, while its effects on C30 and C50 slabs are less pronounced. The improvement is attributed to the pozzolanic reaction of CGS, which refines the microstructure and enhances crack resistance. Numerical simulations reproduced the load–deflection response and failure modes with good accuracy, confirming the reliability of the proposed model. These results highlight the potential of CGS as a sustainable material for structural applications, contributing to both performance enhancement and environmental benefits.

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References

aggregates from coal gasification fly ash and slag. World of Coal Ash (WOCA), 2005: 11-15.

ANSYS. A Finite element computer software and user manual for nonlinear structural analysis. Canonsburg, PA.: ANSYS 2007; Inc; 2007.

Fu B, Cheng Z, Wang D, et al. Investigation on the utilization of coal gasification slag in Portland cement: Reaction kinetics and microstructure. Construction and Building Materials,2022, 323: 126587.

Guo F, Zhao X, Guo Y, et al. Fractal analysis and pore structure of gasification fine slag and its flotation residual carbon. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 2020, 585: 124148.

Guo Y, Hu W, Feng G, et al. Study on the excitation effect and mechanism of coal gasification slag based on solid waste. Powder Technology, 2024, 435: 119460.

Ishikawa Y. Utilization of coal gasification slag collected from IGCC as fine aggregate for concrete//Proceedings of the EUROCOALASH 2012 conference, thessaloniki, Greece. 2012: 25-27.

Jiang P, Xie C, Luo C, et al. Distribution and modes of occurrence of heavy metals in opposed multi-burner coal-water-slurry gasification plants. Fuel, 2021, 303: 121163.

Li Z, Zhang Y, Zhao H, et al. Structure characteristics and composition of hydration products of coal gasification slag mixed cement and lime. Construction and Building Materials, 2019, 213: 265-274.

Luo F, Jiang Y, Wei C. Potential of decarbonized coal gasification residues as the mineral admixture of cement-based material. Construction and Building Materials, 2021, 269: 121259.

Matjie R H, Li Z, Ward C R, et al. Chemical composition of glass and crystalline phases in coarse coal gasification ash. Fuel, 2008, 87(6): 857-869.

Pawar A J, Patil Y D, Vesmawala G R, et al. Two-way flexural behavior of biaxial voided slab using cuboidal shape of void formers//Structures. Elsevier, 2024, 62: 106175.

Pomykała R. The mechanical properties of coal gasification slag as a component of concrete and binding mixtures. Polish Journal of environmental studies, 2014, 23(4): 1403-1406.

Xiang Y, Jiao Y, Wang L. Effect of sludge amino acid-modified magnetic coal gasification slag on plant growth, metal availability, and soil enzyme activity. Journal of Soil and Water Conservation, 2020, 75(4): 515-526.

Xiang Y, Xiang Y, Gao X. Humic acid coupled with coal gasification slag for enhancing the remediation of Cd-contaminated soil under alternated light/dark cycle. Environmental Science and Pollution Research, 2023, 30(1): 1276-1287.

Yang P, Liu L, Suo Y, et al. Physical-chemical coupling excitation of low activity coal gasification slag solid waste and its application as a backfill cementitious material. Construction and Building Materials, 2023, 401: 132973.

Zeng Q, Liu X, Zhang Z, et al. Synergistic utilization of blast furnace slag with other industrial solid wastes in cement and concrete industry: Synergistic mechanisms, applications, and challenges. Green Energy and Resources, 2023, 1(2): 100012.

Zhang L, Yang F, Tao Y. Removal of unburned carbon from fly ash using enhanced gravity separation and the comparison with froth flotation[J]. Fuel, 2020, 259: 116282.

Zhang Y, Qu J, Zhang J, et al. Distribution, occurrence, and leachability of typical heavy metals in coal gasification slag. Science of The Total Environment, 2024, 926: 172011.

Zhang Y, Wang R, Qiu G, et al. Synthesis of porous material from coal gasification fine slag residual carbon and its application in removal of methylene blue. Molecules, 2021, 26(20): 6116.

Zhao Y, Gu X, Xu X. Physical-chemical performance of coal gasification slag with calcination activation utilized as supplementary cementitious material. Construction and Building Materials, 2024, 451: 138776.