Dense Filling Function of Superfine Slag Powder in Cement Particles

Abstract

Abstract: Superfine slag powder can fill the porosity of cement-based materials and improve their microstructure and properties. The effect of superfine slag powder content on the bulk density of cement-superfine slag powder system was quantitatively analyzed by five test methods, including micro powder bulk density tester method, Puntke saturation point water consumption method, LCPC minimum water demand method, paste relative density method and water requirement ratio of standard consistency method. The test results of these five methods were compared with the Reschke theoretical values, the Andreasen equation-grey correlation analysis results and the Aim-Goff model predictive values. The results show that the bulk density values of cement-superfine slag powder system obtained by different tests or analysis methods are quite different. However, the tendency of the bulk density of cement-superfine slag system is basically the same as the content change of superfine slag powder. The paste relative density method and water requirement ratio of standard consistency are more sensitive to the change of bulk density of cementitious material system, which are more suitable for characterizing the bulk density of the cementitious material system. The predictive values of the Aim-Goff model are basically consistent with the test results, and the change of bulk density is more sensitive. It is suggested that the Aim-Goff model should be used to predict the change of the bulk density of the cementitious material system.

Key words: superfine slag powder, cement particle, micro powder bulk density, water consumption at saturation point, minimum water demand, paste relative density, water requirement ratio of standard consistency

CLC Number:

TU528

HUANG Fali, WANG Zhen, YI Zhonglai, CHENG Huan, WEN Jiaxin, YUAN Zhengcheng, JIN Hao, LI Huajian. Dense Filling Function of Superfine Slag Powder in Cement Particles[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(8): 2647-2652.

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