کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
256699 | 503561 | 2015 | 9 صفحه PDF | دانلود رایگان |
• Graphene-like materials (GRH) with high SSA were synthesized from rice husks.
• GRH mortar, with a higher SSA, showed a better compressive strength.
• Large edges in GRH may provide a better bonding environment with cement molecules.
Herein, we demonstrate improvements to the compressive strength of cementitious mortar by incorporating rice husk-derived graphenes (GRHs). Several manufacturing trials were undertaken to synthesize optimized GRHs using different dosages of rice husk ash and potassium hydroxide as well as a range of activation temperatures. The incorporation of GRHs into mortar exhibits a generally enhanced reinforcing effect compared to graphene nanoplatelets (GNPs) and multi-walled carbon nanotubes (MWNTs) because of its high specific surface area. SEM/TEM image analyses confirm that GRH has a corrugated graphene structure and clean edges at the atomic scale. GRH showed extremely high BET surface area (2274 m2/g) compared to those of multi-walled carbon nanotubes and GNPs (50–200 m2/g).
Journal: Construction and Building Materials - Volume 96, 15 October 2015, Pages 189–197