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Effect of Ground Granulated Blast Furnace Slag on Nanoindentation Characteristics of Cement Hydrates

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In order to comprehensively master the effect of ground granulated blast furnace slag (GGBFS) on cement hydrates from the nano-scale structure perspective, nanoindentation characteristics of cement with GGBFS have been investigated by elective solvent dissolution method, the equilibrium calculation of cementitious material hydration and nanoindentation tests. The results indicate that there are elastic modulus overlaps between GGBFS and calcium hydroxide (CH), and the used rule that there are no elastic modulus overlaps between hydrate phases and unhydrated phases is proved to be inaccurate; GGBFS can be distinguished from CH through the volume ratio of calcium-silicate-hydrates (C-S-H) and the unhydrated GGBFS; with the increase of GGBFS dosage, the volume fractions of high-density calcium-silicate-hydrates (HD C-S-H) and porosity show a tendency of increase, and the volume fractions of HD C-S-H in C-S-H increase also; however, the volume fractions of low-density calcium-silicate-hydrates (LD C-S-H) show a decrease tendency.
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Keywords: CALCIUM-SILICATE-HYDRATE (C-S-H); ELASTIC MODULUS; GROUND GRANULATED BLAST FURNACE SLAG (GGBFS); HYDRATE; NANOINDENTATION; VOLUME FRACTION

Document Type: Short Communication

Publication date: June 1, 2015

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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