Experimental investigation of mechanical and microstructural properties of concrete containing modified nano-Graphene Oxide
Maryam Ashouri,Ehsanollah Zeighami,Alireza Azarioon,Seyyed Mohammad Mirhosseini,Sattar Ebrahimi Yonesi
Abstract
Microscopic defects within the microstructure of hardened cement paste are the main source of weakness in concrete. As a solution, nano-graphene oxide (GO) can be employed to improve the cement paste microstructure. However, there is a number of disadvantages, e.g., fluidity reduction and non-uniform dispersion. The present study sought to modify GO by fabricating a copolymer (PSGO) in a novel process to exploit the advantages of nano-GO while minimizing its disadvantages. Using 0.03wt% copolymerled to 38.8% higher tensile strength, 29.3% higher compressive strength and 25% higher workability. The SEM images revealed that GO and modified GO enhanced concrete by secondary hydration and bonding with C-S-H, creating a firm, integrated, and foil-like structure, and reducing the crack size and depth.
Key Words
compressive strength; copolymer; graphene oxide; scanning electron microscopy; tensile strength
Address
Maryam Ashouri, Ehsanollah Zeighami and Seyyed Mohammad Mirhosseini: Department of Civil Engineering, Arak Branch, Islamic Azad University, Arak, Iran
Alireza Azarioon: Department of Civil and Architectural Engineering, Malayer University, Malayer, Iran
Sattar Ebrahimi Yonesi: Department of Chemistry, Malayer Branch, Islamic Azad University, Malayer, Iran
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