Influence of Steel Slag Dosage on Early Age Strength and Rheological Properties of Paste
WU Fan1, YANG Faguang1, XIAO Bolin1,2, YANG Zhiqiang1,3, GAO Qian1
1 Key Laboratory of Minstry of Education of China for High-efficient Mining and Safety of Metal Mine, University of Science and Technology of Beijing, Beijing 100083, China; 2 Department of Civil Engineering, University of Ottawa, Ottawa K1N6N5, Canada; 3 Jinchuan Group Co., Ltd., Jinchang 737100, China
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.
吴凡, 杨发光, 肖柏林, 杨志强, 高谦. 钢渣掺量对膏体早期强度及流变特性的影响[J]. 材料导报, 2021, 35(3): 3021-3025.
WU Fan, YANG Faguang, XIAO Bolin, YANG Zhiqiang, GAO Qian. Influence of Steel Slag Dosage on Early Age Strength and Rheological Properties of Paste. Materials Reports, 2021, 35(3): 3021-3025.
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2021, Vol. 35 
