碱渣-电石渣激发混凝土的基本力学性能与应力-应变关系

doi:10.11896/cldb.22070247

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Abstract The large-scale stacking of alkaline industrial solid wastes such as soda residue (SR) and calcium carbide slag (CS) has caused serious environmental pollution problems, which is urgent to expand the channels of resource utilization. A new type of concrete (SCB-based concrete, SCBC) was prepared by using the previously developed SR-CS synergistically activated blast furnace slag-fly ash binder (SCB) instead of cement. Its basic mechanical properties such as compression, tensile and flexural properties, and uniaxial compressive constitutive relationship were studied. The results showed that the early compressive strength of SCBC was slower than that of Portland cement concrete (PCC), which could be improved by appropriate heat curing (60—75 ℃@12 h), and would not have an adverse impact on the later strength. The tension-compression ratio and flexural-compression ratio were 0.102±0.006 and 0.137±0.007, respectively, which were higher than that of PCC with the same grade. SCBC had a shorter elastic rising segment and longer plastic rising segment than PCC under uniaxial compression, and exhibited stronger brittleness after peak stress. The prediction models of standard compressive, axial compressive, split tensile, and flexural strength, as well as the uniaxial compressive stress-strain relationship, were established through statistical regression, which were in good agreement with the experimental values, and laid a theoretical foundation for the mix proportion design, strength prediction and engineering application of SCBC.

Key words： soda residue calcium carbide slag concrete mechanical property stress-strain relationship

Published: 10 September 2024 Online: 2024-09-30

CLC number:

TU528

Fund:Hebei Natural Science Foundation (E2023203172), the National Natural Science Foundation of China (52078450), and the Key Research and Development Project of Hebei Province (19211505D).

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	Articles by authors
	GUO Weichao
	ZHAO Qingxin
	QIU Yongxiang
	SHI Yuxuan
	WANG Shuai

Cite this article:

GUO Weichao,ZHAO Qingxin,QIU Yongxiang, et al. Basic Mechanical Properties and Stress-Strain Relationship of Soda Residue Calcium Carbide Slag Activated Concrete[J]. Materials Reports, 2024, 38(17): 22070247-8.

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http://www.mater-rep.com/EN/10.11896/cldb.22070247 OR http://www.mater-rep.com/EN/Y2024/V38/I17/22070247

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