Title:
Structural Performance of Geopolymer Concrete: Bond, Flexural, Shear and Axial Strengths (Prepublished)
Author(s):
Giwan Noh, Myoungsu Shin, Keun-Hyeok Yang, and Thomas H.-K. Kang
Publication:
Structural Journal
Volume:
Issue:
Appears on pages(s):
Keywords:
eco-friendly material; geopolymer; geopolymer concrete; structural performance
DOI:
10.14359/51744396
Date:
12/6/2024
Abstract:
Portland cement has played a significant role in the construction of major infrastructure and building structures. However, in light of the substantial CO2 emissions associated with its production, there is a growing concern about environmental issues. Accordingly, the development of eco-friendly alternatives is actively underway. Geopolymer represents a class of inorganic polymers formed via a chemical interaction between solid aluminosilicate powder with alkali hydroxide and/or alkali silicate compounds. Concrete made with geopolymers, as an alternative to Portland cement, generally demonstrates comparable physical and durability characteristics to ordinary Portland cement concrete (OPC). Research on the material properties of geopolymer concrete (GPC) has made extensive progress. However, the number of large-scale tests that were conducted to assess its structural performance is still insufficient. Additionally, there is a shortage of comprehensive studies that compile and analyze all the structural experiments conducted thus far to evaluate the GPC’s potential. Therefore, this study aimed at compiling and analyzing a number of bond, flexural, shear, and axial strength tests of GPC to assess its potential as a substitute for OPC and to identify its distinctive characteristics compared to OPC. As a result, it is considered that GPC can be used as a substitute for OPC without any structural safety issues. However, caution is needed in terms of deflection and ductility, and additional experiments are deemed necessary in the aspect of compressive strength of large-scale members.