Thermal performance, freeze-and-thaw resistance, and bond strength of cement mortar using rice husk-derived graphene. (15th August 2017)

• Record Type: Journal Article
• Authors: Rhee, Inkyu; Lee, Jun-Seok; Kim, Jin Hee; Kim, Yoong Ahm
• Is Part Of: Construction & building materials. Volume 146(2017)
• Page Start: 350
• Page End: 359
• Publication Date: 2017-08-15
• Subjects: Rice husk-derived graphene -- Thin overlay -- Thermal conductivity -- Bond strength -- Freeze-and-thaw resistance; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2017.04.109
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: Thermal performance of GRH was fair among other carbon-based materials. GRH mortar showed a better performance against freezing-and-thawing attack. Bond strength of thin GRH overlay exhibited better on 0.75 wt% specimen. Abstract: We explored the thermal performance, bond strength, and freeze-and-thaw resistance of mortar composite incorporating rice husk-derived graphene-like material (GRH). These three features are key for road pavement application, especially against ice and snow on its surface. Groups of GRH mortar prisms (20 × 20 × 50 mm, 50 × 50 × 100 mm) were tested to examine heating and cooling performance, in comparison with other carbon-based materials: multi-walled CNT, graphene platelets, and carbon fibers. Additionally, thermal performance was assessed in terms of GRH wt% insertion. GRH cubes of 50 mm with different wt% were tested to capture freeze-and-thaw resistance for 300 cycles. XRD, Rietveld, and SEM-EDS analyses of calcium silicate hydrate (CSH) gels of undamaged/damaged cubes with/without GRH were compared at the age of 120 days after casting. A group of Φ 100 × 200 mm slanted concrete cylinders was tested with a 10-mm-thick overlay with different wt% GRH. The compressive failure load and fractured area were used to evaluate the bond strength of the GRH thin overlay.