Compressive strength of cement mortar incorporating graphene-based nanosheets in powder and liquid forms
DOI:
https://doi.org/10.54772/jomc.v16i01.1297Tóm tắt
This study investigates the influence of graphene-based nanosheets (GNS) in both liquid (G-L) and powder (G-P) forms on the compressive strength development of cementitious composites. Mortar specimens were prepared with GNS concentrations ranging from 0% to 1% by weight of cement and tested at 1, 3, 7, and 28 days. The results indicate that G-P consistently enhanced compressive strength, with the optimal dosage (0.3-0.5%) improving 1-day strength by up to 24%, and 28-day strength by 17%. Conversely, G-L exhibited inconsistent early-age performance, with some dosages causing strength reductions (e.g., 0.3% G-L decreased 3-day strength by 7%), although higher concentrations (0.8-1.0%) improved 28-day strength by up to 14%. Excessive graphene content (≥0.8%) led to agglomeration, negatively impacting early-age strength despite long-term improvements. These findings provide valuable insights into the optimization of GNS dosage to enhance the performance of cement-based materials, or for the reduction of cement without change the mechanical strengths.
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