Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5347187 | Applied Surface Science | 2018 | 11 Pages |
Abstract
The present study evaluated pore surface fractal characteristics of high-strength cement pastes with different ground granulated blast-furnace slag (GGBFS) replacement ratios. Using the results of mercury intrusion porosimetry measurements, the surface fractal dimension in various pore-size ranges was calculated. Experimental results show that the fractal characteristics appeared in mesopores in range of 6-10Â nm and 10-25Â nm and larger capillary pores with sizes of more than 100Â nm. In larger capillary pores, as the GGBFS replacement ratio increased up to 65%, the surface fractal dimension and pore volume decreased, and they increased when the GGBFS replacement ratio increased from 65% to 80%. In contrast, higher GGBFS replacement ratios in mesopore regions resulted in an increased surface fractal dimension and pore volume. Furthermore, in the regions where fractal characteristics appeared, pore volume and the surface fractal dimension exhibited a proportional relationship. The ratio of the surface fractal dimension to the volume of larger capillary pores was strongly correlated with the compressive strength of the specimens.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Jiyoung Kim, Young Cheol Choi, Seongcheol Choi,