Wen Meng-dan, Chen Jia-jian, Gao Yu-shen, et al. Effect of Ground Granulated Blast Furnace Slag on Properties Based on Analysis of Water Film Thickness Hypothesis[J]. 2018, 35(4): 119-126.
Wen Meng-dan, Chen Jia-jian, Gao Yu-shen, et al. Effect of Ground Granulated Blast Furnace Slag on Properties Based on Analysis of Water Film Thickness Hypothesis[J]. 2018, 35(4): 119-126.DOI: 10.12052/gdutxb.170161.
Effect of Ground Granulated Blast Furnace Slag on Properties Based on Analysis of Water Film Thickness Hypothesis
To study the effect of ground granulated blast furnace slag (GGBS) on the flowability
cohesiveness and strength of cement paste
30 mixes of cement paste samples with different water/cementitious material ratios and different GGBS contents were measured. To reveal the flowability mechanism of GGBS cement paste
the packing density of 5 different cementitious mixes with various GGBS content was measured. The water film thickness of each cement paste mix was calculated based on the packing density test
and the effect of water film thickness on the flowability of GGBS cement paste was discussed. Results demonstrated that addition of moderate GGBS could increase the flowability and compressive strength
but impair the cohesiveness. The best overall performance of cement paste occurs when 5% GGBS is added. The addition of GGBS had positive effect on packing density of cementitious materials. The water film thickness is the major governing factor of flowability of GGBS cement paste
and the flowability of cement paste increases with the increase of water film thickness.
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references
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