Sumajouw’s research while affiliated with Curtin University and other places

... Creating geopolymer cement requires an alumina-silicate precursor, alkaline reagent and water [18]. Previous studies proves that the one of the factors that affecting the mechanical properties of geopolymer concrete is the alkali activator content in terms of type of alkali activator, molarity of sodium hydroxide and activator ratio [3], [5], [7], [8], [11], [14], [19]- [21]. ...

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A Review of Eggshell Powder and Fly Ash-Based Geopolymers Concrete

... The exact arrangement and proportions of these components have a substantial impact on the geopolymer's workability, setting time, strength development, and long-term durability. Finding the ideal mix proportion is a continuous process that seeks to improve the geopolymer concrete's sustainability and performance (Hardjito et al., 2004). ...

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A Novel Approach for Compressive Strength Prediction in Fly-Ash Geopolymer Concrete: Leveraging Optimization Algorithms, Ensemble model and SHAP Interpretation

... In addition, there are added benefits as geopolymeric concretes and mortars offer improved physical properties when compared to Portland cement equivalents. If correctly formulated, they show higher resistance to acid and sulfate attack, lower shrinkage, increased stability at high temperatures and rapid strength gain [6][7][8][9][10]. ...

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Development of a Geopolymer Binder from the Interbasaltic Laterites of Northern Ireland

... Basically metakaolin based geopolymers have different structural selectivity, optimum sorption capacity, optimal binding affinity, cation exchange properties for different metal cations such as Ni, Pb, Zn Cd, Cu, Cr etc., which can be used for optimized process design of waste water system to prevent further environmental degradation as suggested by Cheng et al. (2012); Naghsh and Shams (2017). Successful column tests experiment showed that geopolymeric monolith (as a sustainable cementitious material) being low cost and eco-friendly is a promising emerging binder for wastewater metal removal (Palomo et al., 1999 andSujatha et al., 2012;Sumajouw et al., 2005;Taki et al., 2020) and can replace the conventional costly adsorbents like mesoporous silica, silica nanoparticles, activated carbon and alumina. In addition, geopolymer can be used as a sustainable agent for the purpose of immobilizing heavy metals from wastewater through the physico-chemical process of adsorption. ...

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Reappraisal Review on Geopolymer: A New Era of Aluminosilicate Binder for Metal Immobilization

... Previously, the investigation of reinforced GRC structural element behavior had received limited attention until a research team at Curtin University in Australia initiated a study on this topic [46][47][48][49][50][51]. Their research specifically focused on understanding the behavior of fly ash-based GRC structural members. ...

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The evaluation of behavior of geopolymer reinforced concrete and conventional reinforced concrete beams: a critical review

... The investigations of the constitutive stress-strain model of GPC are relatively rare compared with those available for conventional concrete [116,117]. Using three fly ash-based mixes, Hardjito et al. [118] investigated the stress-strain behaviour of GPC. It was found that the stress-strain behaviour predicted by the formula of Hardjito et al. [118] agreed with the constitutive model recommended by Collins et al. [119] for OPC. ...

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Mechanical characteristics and developing a compressive stress–strain model of geopolymer concrete