Experimental Study on Uniaxial Compressive Mechanical Properties of Multi-component Solid Waste Composite Cementitious Material Concrete
KANG Lihua1,2, XIAO Fengjuan1, ZHANG Guangtian3,*, YU Haiyang3
1 School of Civil Engineering, Shijiazhuang Tiedao University, Shijiazhuang 050000, China 2 School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang 050000, China 3 Hebei Provincial Science and Technology Key Laboratory of Solid Waste for Building Materials, Shijiazhuang 050000, China
Abstract: In order to study the influence of multi-component solid waste composite cementitious material on the properties of low-carbon concrete and realize the large-scale high value-added utilization of industrial solid waste, this work conducts uniaxial compression tests on different grades of solid waste-based low-carbon concrete (C30, C40, C50) prepared with solid waste-based cementitious materials and additives, and studies their failure modes, standard compressive strength, splitting strength, elastic modulus and peak strain. The results show that the early compressive strength of low-carbon concrete based on solid waste is lower than that of cement concrete, but the 28-day strength meets the requirements of the code. Under uniaxial compression, the stress-strain curve of solid waste-based low-carbon concrete is gentler, the peak stress decreases, and the ductility is slightly worse. For C40 and C50 concrete, the addition of solid waste-based cementitious materials increases the peak strain and ultimate strain, and the elastic modulus decreases by 6.4% and 13.76%, respectively. The prediction models of axial compressive strength and splitting tensile strength are established by regression analysis. Based on the stress-strain relationship and the theory of Zhenhai Guo, a constitutive model suitable for low-carbon concrete based on solid waste is proposed, whose predicted results are in good agreement with the experimental values.
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2026, Vol. 40 
