钢渣掺量对膏体早期强度及流变特性的影响

doi:10.11896/cldb.20050029

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Abstract In order to explore the influence of steel slag dosage on the early age strength and rheological properties of paste, experiments of the early age strength and rheological properties of paste with different steel slag dosage were designed. The hydration products of cementitious materials were studied by XRD, TG/DTG and SEM. The mechanisms of yield stress and viscosity change of slurry were analyzed by Zeta potential and pH meter. The results show that the strength of the paste increases first and then decreases at the early stage (3 d, 7 d, 14 d and 28 d), and the best strength is when the steel slag content is 35%. The total loss of the slurry sample after 28 d curing is 23.40%, more hydration products and denser structure. With the increase of the amount of steel slag, the yield stress and viscosity increase of sample all the time. The high yield stress of slurry is caused by the large attraction between solid particles and the need for external force to destroy the flocculation structure, and the increased friction between solid particles is an important reason for the high viscosity of slurry.

Key words： paste steel slag dosage early age strength rheological properties mine backfilling

Published: 19 February 2021

CLC number:

TD853

Fund:This work was financially supported by National Key Research and Development Program(2017YFC0602903), Special Project for Transformation of Major Scientific and Technological Achievements in Hebei Province (19073818Z).

About author:: Fan Wu, Ph.D. candidate in mining engineering, Beijing University of Science and Technology. The research work mainly focuses on the development of mine filling cementitious materials and the comprehensive utilization of metallurgical solid wastes, and participates in the National Key R & D Projects, the Special Project for the Transformation of Major Scientific and Technological Achievements in Hebei Province, the development and pilot test of all solid waste filling cementitious materials in Makeng Iron mine, the pilot test and industrial application of new filling cementitious materials, and the research of filling core materials in large underground mines research and application.
Qian Gao, professor and doctoral supervisor of Beijing University of Science and Technology. In 1989, he graduated from the Institute of Geology, Chinese Academy of Sciences, majoring in engineering geology. In the same year, he entered the postdoctoral mobile station of Beijing University of Science and Technology, and then remained in the University for teaching. He has published more than 385 papers in academic journals at home and abroad and applied for more than 10 national invention patents. It is mainly engaged in the research on the development of mine filling cementitious materials and the comprehensive utilization of metallurgical solid wastes, with emphasis on the comprehensive utilization of slag and steel slag, the optimal design of mine mining and ground pressure control technology. It has won 1 second prize of national science and technology progress, 1 first prize of Ministry of Education Science and Technology Progress, 1 first prize of China Nonferrous Metal Industry Science and Technology, 2 second prizes of China Nonferrous Metal Industry Science and Technology, and 1 second prize of Metallurgy Science and Technology.

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	WU Fan
	YANG Faguang
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Cite this article:

WU Fan,YANG Faguang,XIAO Bolin, et al. Influence of Steel Slag Dosage on Early Age Strength and Rheological Properties of Paste[J]. Materials Reports, 2021, 35(3): 3021-3025.

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http://www.mater-rep.com/EN/10.11896/cldb.20050029 OR http://www.mater-rep.com/EN/Y2021/V35/I3/3021

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