A comparison of graphene oxide, reduced graphene oxide and pure graphene: early age properties of cement composites

Qureshi, Tanvir; Panesar, Daman

Abstract

This study compares the hydration, mechanical and transport properties of cement based composites containing graphene oxide (GO), reduced graphene oxide (rGO), and pure graphene (G). The only mix design variable other than the type of graphene material (GO, rGO, and G) that was considered is the concentration of graphene materials which ranged from 0.01% to 0.16% of cement weight. Outcomes from this research indicate that the physical and chemical properties of GO, rGO and G influence the early age properties of the cement based composites. A high amount of oxygen-containing functional groups of GO considerably enhances the cement hydration and forms a compacted composite bond which improved the 14-day compressive and flexural strength by 44% and 83%, respectively compared to the control mix. The reduced amount of functional groups and moderately high physical strength of rGO gradually enhances cement hydration and reinforces the composite matrix which improved the 14-day compressive and flexural strength by 42% and 52%, respectively compared to the control mix. The high physical strength of G reinforces the composite matrix which improved the 14-day compressive and flexural strength by 34% and 56%, respectively compared to the control mix. The microscopic imaging and electrical resistivity performance also confirms the influence of graphene materials in the composite.

• Presentation Conference Type: Conference Paper (published)
• Conference Name: International Conference on Sustainable Materials, Systems and Structures
• Start Date: Mar 18, 2019
• End Date: Mar 22, 2019
• Acceptance Date: Dec 2, 2018
• Publication Date: 2019
• Deposit Date: Sep 30, 2020
• Pages: 342-349
• Book Title: Proceedings of the International Conference on Sustainable Materials, Systems and Structures (SMSS2019) New Generation of Construction Materials
• ISBN: 9782351582237
• Public URL: https://uwe-repository.worktribe.com/output/6726631
• Publisher URL: https://www.rilem.net/publication/publication/514?id_papier=11917