Indexed by:期刊论文
Date of Publication:2016-04-01
Journal:JOURNAL OF CENTRAL SOUTH UNIVERSITY
Included Journals:SCIE、EI、Scopus
Volume:23
Issue:4
Page Number:919-925
ISSN No.:2095-2899
Key Words:functionalized graphene nano-sheets; cement mortars; mechanical strength; microstructure
Abstract:Functionalized graphene nano-sheets (FGN) of 0.01%-0.05% (mass fraction) were added to produce FGN-cement composites in the form of mortars. Flow properties, mechanical properties and microstructure of the cementitious material were then investigated. The results indicate that the addition of FGN decreases the fluidity slightly and improves mechanical properties of cement-based composites significantly. The highest strength is obtained with FGN content of 0.02% where the flexural strength and compressive strength at 28 days are 12.917 MPa and 52.42 MPa, respectively. Besides, scanning electron micrographs show that FGN can regulate formation of massive compact cross-linking structures and thermo gravimetric analysis indicates that FGN can accelerate the hydration reaction to increase the function of the composite effectively.