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A platform for research: civil engineering, architecture and urbanism
Investigation on preparation and multifunctionality of reduced graphene oxide cement mortar
Highlights A new avenue to prepare rGO suspension with excellent comprehensive was developed. The mechanical and functional properties of samples were significantly improved. The percolation threshold of rGO was determined by comparing different performance. The functional mechanism of rGO to mortar was analyzed by comparing different model.
Abstract For modern concrete materials and structures, how to realize the multifunctional application is still a challenge. The introduction of functional components into concrete materials is the most effective method. The present study successfully develops a new avenue to prepare rGO suspension with excellent dispersibility and stability through the combination of dispersant and ultrasonic pre-dispersion. This rGO suspension is added to the cement-based material, resulting in the improvement of mechanical and functional properties. The compressive and flexural strength of mortar are increased by 45% and 50% at 3 days, respectively. Meanwhile the hydration heat and pore structure are improved up to doping 2.00 wt% rGO. Moreover, the resistivity and thermal conductivity of mortar are decreased by 45% and increased by 23%, while the electromagnetic shielding effectiveness of cement paste is increased by 45%. In addition, the pressure-sensitive property of mortar increases first and then decreases with the increases of rGO content, wherein the largest stress and strain sensitivity coefficient can reach up to 1.28%/MPa and 147.80 with 2.00 wt% rGO. These results demonstrate that doping rGO is a promising approach to the improvement of the functionality of cement-based materials resulting from the doping rGO is attributed to, the formation of a conductive network structure with the continuous phase in the cement matrix when rGO content reached percolation threshold.
Investigation on preparation and multifunctionality of reduced graphene oxide cement mortar
Highlights A new avenue to prepare rGO suspension with excellent comprehensive was developed. The mechanical and functional properties of samples were significantly improved. The percolation threshold of rGO was determined by comparing different performance. The functional mechanism of rGO to mortar was analyzed by comparing different model.
Abstract For modern concrete materials and structures, how to realize the multifunctional application is still a challenge. The introduction of functional components into concrete materials is the most effective method. The present study successfully develops a new avenue to prepare rGO suspension with excellent dispersibility and stability through the combination of dispersant and ultrasonic pre-dispersion. This rGO suspension is added to the cement-based material, resulting in the improvement of mechanical and functional properties. The compressive and flexural strength of mortar are increased by 45% and 50% at 3 days, respectively. Meanwhile the hydration heat and pore structure are improved up to doping 2.00 wt% rGO. Moreover, the resistivity and thermal conductivity of mortar are decreased by 45% and increased by 23%, while the electromagnetic shielding effectiveness of cement paste is increased by 45%. In addition, the pressure-sensitive property of mortar increases first and then decreases with the increases of rGO content, wherein the largest stress and strain sensitivity coefficient can reach up to 1.28%/MPa and 147.80 with 2.00 wt% rGO. These results demonstrate that doping rGO is a promising approach to the improvement of the functionality of cement-based materials resulting from the doping rGO is attributed to, the formation of a conductive network structure with the continuous phase in the cement matrix when rGO content reached percolation threshold.
Investigation on preparation and multifunctionality of reduced graphene oxide cement mortar
Zhai, Shengtian (author) / Pang, Bo (author) / Liu, Guojian (author) / Zhang, Yu (author) / Xu, Kaili (author) / She, Wei (author) / Zhang, Yunsheng (author)
2020-12-20
Article (Journal)
Electronic Resource
English
| European Patent Office | 2024
High-bending-resistance graphene oxide cement mortar and preparation method thereof
| European Patent Office | 2021