油页岩渣对混凝土抗压强度和抗氯离子侵蚀的影响

doi:10.11896/cldb.20070312

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Abstract Ahuge amount of oil shale residue is left after retorting or burning of oil shale. The dumping of oil shale residue occupies land resources and seriously pollutes the environment. Oil shale residue concrete(OSRC) was prepared with oil shale retort residue as coarse aggregate. The workability, microstructure, compressive strength and chloride ion permeability of OSRC were tested. The results showed that the workability, mechanical properties and chloride corrosion resistance of OSRC decrease with the increase of oil shale residue replacement(V_r). When V_r is 25% and 43%, the cubic compressive strength of OSRC is 29.9 MPa and 25.5 MPa, and the chloride ion permeability is respectively evaluated as very low and low. While V_r is greater than 50%, the electric flux of OSRC increases rapidly with the increase of V_r, so 50% is the critical V_r of OSRC chloride ion permeability. It was found that the farther away from the boundary between the OSR and the interface transition zone (ITZ), the fewer ettringite crystals and more calcium silicate hydrate gel in ITZ, and there is very little calcium hydroxide crystals in whole ITZ. OSR has water absorption and desorption characteristics. In addition, the compressive failure mode of OSRC is OSR fracture with smooth fracture surface and cement mortar spalling around natural aggregate. Finally, OSR and ITZ are the weak areas of OSRC, which are the key to the follow-up research. And porous wastes such as OSR could be used as concrete fillers and internal curing materials.

Key words： oil shale residue concrete microstructure compressive strength chloride corrosion resistance

Published: 25 November 2021 Online: 2021-12-13

CLC number:	TU528
	X754

Fund:National Natural Science Foundation of China(52078148,51778158), the Department of Water Resources of Guangdong Province(2017-32), the Guangzhou University Graduate Innovation Research Funding Program(2019GDJC-D14), the Natural Science Foundation of Guangdong University of Petrochemical Technology(2017qn33), the Natural Science Foundation of Maoming(2017306).

About author: Changqing Quanreceived his M.S. degree in June 2016 from Guangzhou University in engineering, majoring in disaster prevention and mitigation engineering. He is currently a doctoral candidate in structural engineering in Guangzhou University, focusing on the research of high performance concrete and solid waste resource utilization.
Chujie Jiaoreceived his Ph.D. degree in structural engineering from Southeast University in 2004. He is currently a professor and Ph.D. supervisor in Guangzhou University, focusing on the research of high performance concrete and solid waste resource utilization.

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	QUAN Changqing
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Cite this article:

QUAN Changqing,JIAO Chujie,YANG Yunying, et al. Effect of Oil Shale Residue on Compressive Strength and Chloride Corrosion Resistance of Concrete[J]. Materials Reports, 2021, 35(22): 22079-22084.

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http://www.mater-rep.com/EN/10.11896/cldb.20070312 OR http://www.mater-rep.com/EN/Y2021/V35/I22/22079

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