An Experimental Study on the Mechanical Properties of Low-Aluminum and Rich-Iron-Calcium Fly Ash-Based Geopolymer Concrete

Jack Widjajakusuma; Ika Bali; Gino Pranata Ng; Kevin Aprilio Wibowo

doi:10.46604/aiti.2022.10525

Authors

Jack Widjajakusuma Department of Civil Engineering, Pelita Harapan University, Tangerang, Indonesia
Ika Bali Department of Civil Engineering, President University, Cikarang, Indonesia
Gino Pranata Ng Department of Civil Engineering, Pelita Harapan University, Tangerang, Indonesia
Kevin Aprilio Wibowo Department of Civil Engineering, Pelita Harapan University, Tangerang, Indonesia

DOI:

https://doi.org/10.46604/aiti.2022.10525

Keywords:

geopolymer concrete, fly ash, rich iron, low aluminum, mechanical characteristics

Abstract

Limited studies have been conducted on low-aluminum and rich-iron-calcium fly ash (LARICFA)-based geopolymer concrete with increased strength. This study aims to investigate the mechanical characteristics of LARICFA-based geopolymer concrete, including its compressive strength, split tensile strength, and ultimate moment. The steps of this study include material preparation and testing, concrete mix design and casting, specimen curing and testing, and the analysis of testing results. Furthermore, the specimen tests consist of the bending, compressive, and split tensile strength tests. The results show that the average compressive strength and the ultimate moment of the geopolymer concrete are 38.20 MPa and 22.90 kN·m, respectively, while the average ratio between the split tensile and compressive strengths is around 0.09. Therefore, the fly ash-based geopolymer concrete can be used in structural components.

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