期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 146, 期 -, 页码 350-359出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2017.04.109
关键词
Rice husk-derived graphene; Thin overlay; Thermal conductivity; Bond strength; Freeze-and-thaw resistance
资金
- National Research Funds, Korean Ministry of Education [2016-1033]
- National Research Foundation of Korea [2014R1A1A2A16055592] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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 x 20 x 50 mm, 50 x 50 x 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 Phi 100 x 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. (C) 2017 Elsevier Ltd. All rights reserved.
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