Open AccessImprovement of Flexural and Compressive Strength of Cement Mortar by Graphene Nanoplatelets
Author(s) -
Yu Chen,
Xingchen Li,
ChuangChuang Li,
Nana Zhang,
Ronggui Liu,
Chunhua Lü
Publication year - 2021
Publication title -
the open civil engineering journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.249
H-Index - 16
ISSN - 1874-1495
DOI - 10.2174/1874149502115010165
Subject(s) - flexural strength , materials science , cement , compressive strength , composite material , mortar , durability , microstructure , graphene , exfoliated graphite nano platelets , composite number , nanotechnology
Background: In order to provide space for improving the durability of engineering structures by enhancing strength, the addition of nanomaterials has become a research trend in recent years. Graphene and its derivatives have unique properties and have been used in certain fields, which has also stimulated continuous and in-depth research on whether it can improve structural strength. Objective: This paper investigates the mechanical properties and mechanism of cement-based materials reinforced by Graphene Nanoplatelets (GNPs). Methods: Macroscopically, the flexural strength and compressive strengths of cement mortar were tested. Microscopically, the structure and composition were characterized and analyzed by SEM, EDS, and XRD. Results: The results show that the mechanical properties of modified cement mortar are directly related to the GNPs content. When the GNPs content is 0.04wt%, the flexural and compressive strength can still be increased by 12.8% and 33.9% after 28 d. Furthermore, the appropriate content of GNPs dispersed in the cement matrix played a role in promoting cement hydration. The interconnection with hydration products further reduces cracks and pores so that the cement composites form a denser microstructure. Conclusion: The results obtained above would provide references for understanding the reinforcement mechanism of GNPs.