Sodium hydroxide effect on the mechanical properties of <scp>flyash‐slag</scp> based geopolymer concrete

Verma, Manvendra; Dev, Nirendra

doi:10.1002/suco.202000068

Cited by 87 publications

(39 citation statements)

References 11 publications

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“…The large surface area of nanoparticles is critical for hydration. The nanomaterial improves early hydration and speeds up the creation of the hydration process [ 14 , 15 ]. Nanotechnology is an emerging discipline that aims to create new materials with improved characteristics and performance from a construction point of view.…”

Section: Introductionmentioning

confidence: 99%

“…Chemical and physical techniques utilize many radiations, specific reductants, and potentially hazardous substances to the environment and human health. Nano concrete is defined as a nanomaterial or concrete containing nanomaterials with a particle size of less than 500 nm [ 15 , 16 ]. The addition of nanoparticles to concrete was thought to increase the strength of ordinary concrete.…”

Section: Introductionmentioning

confidence: 99%

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Review on the Relationship between Nano Modifications of Geopolymer Concrete and Their Structural Characteristics

et al. 2022

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The main objective of this review is to study some important nanomaterials and their impact on the performance of geopolymer concrete. This paper is an investigation into trends and technology in the development of different nanomaterials to develop higher structural performance geopolymer concrete. The effect of the alkaline to binder and sodium silicate to sodium hydroxide ratio on the performances of geopolymer performances is studied. The relationship between setting time and slump is evaluated through the ternary plot, the variation in compressive strength values is evaluated using the kernel density plot, and the relationship between split tensile and flexural strength is investigated using the scattering interval plot. Regression analysis is carried out among water absorption and bulk-density result values obtained from previous literature. As the molarity and alkaline to binder (A/B) ratios increase, the strength development of geopolymer concrete increases up to a specific limit. The addition of a small quantity of nanomaterials, namely, nano silica, nano alumina, carbon nano tubes, and nano clay, led to the maximum strength development of geopolymer concrete. Incorporating these nanomaterials into the geopolymer significantly refines the structural stability, improving its durability. The various products in GP composites emerging from the incorporation of highly reactive SEM, XRD, and FTIR analysis of nanomaterials reveal that the presence of nanomaterials, which enhances the rate of polymerization, leads to better performance of the geopolymer.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Review on the Relationship between Nano Modifications of Geopolymer Concrete and Their Structural Characteristics

et al. 2022

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“…The use of up to 20% granite debris in geopolymer concrete had a significant beneficial effect on water permeability, chloride penetration depth, and carbonation depth, all of which were significantly reduced when compared to controlled geopolymer concrete in testing. Acid assault was found to severely harm geopolymer concrete [17,26]. The acid resistance of geopolymer concrete can be improved by using 20% granite debris as natural, fine aggregates.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Effect of Granite Waste Powder by Varying the Molarity of Activator on the Mechanical Properties of Ground Granulated Blast-Furnace Slag-Based Geopolymer Concrete

et al. 2022

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Industrial waste such as Ground Granulated Blast-Furnace Slag (GGBS) and Granite Waste Powder (GWP) is available in huge quantities in several states of India. These ingredients have no recognized application and are usually shed in landfills. This process and these materials are sources of severe environmental pollution. This industrial waste has been utilized as a binder for geopolymers, which is our primary focus. This paper presents the investigation of the optimum percentage of granite waste powder as a binder, specifically, the effect of molar and alkaline to binder (A/B) ratio on the mechanical properties of geopolymer concrete (GPC). Additionally, this study involves the use of admixture SP-340 for better performance of workability. Current work focuses on investigating the effect of a change in molarity that results in strength development in geopolymer concrete. The limits for the present work were: GGBS partially replaced by GWP up to 30%; molar ranging from 12 to 18 with the interval of 2 M; and A/B ratio of 0.30. For 16 M of GPC, a maximum slump was observed for GWP with 60 mm compared to other molar concentration. For 16 M of GPC, a maximum compressive strength (CS) was observed for GWP with 20%, of 33.95 MPa. For 16 M of GPC, a maximum STS was observed for GWP, with 20%, of 3.15 MPa. For 16 M of GPC, a maximum FS was observed for GWP, with 20%, of 4.79 MPa. Geopolymer concrete has better strength properties than conventional concrete. GPC is $13.70 costlier than conventional concrete per cubic meter.

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“…The compressive strength of the GPC depends on the various parameters are as the molarity of NaOH, alkaline ratio, curing condition, curing temperature, curing time, water content, and superplasticizer. The compressive strength of the GPC increases with the increment of NaOH concentration in the mix design [66].…”

Section: 3compressive Strengthmentioning

confidence: 96%

Geopolymer Concrete: A Sustainable and Economic Concrete via Experimental Analysis

Verma¹,

Dev²

2021

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Geopolymer concrete is a sustainable, economical, eco-friendly, and high-strength concrete. The GPC utilizes industrial solid wastes like flyash and slag as binding material and is activated by the alkaline solution containing NaOH and Na2SiO3 in the design mix. The experimental investigation analyzes both GPC and OPC concrete's physical and mechanical properties for the same mix design and analyzes the concretes cost and sustainability. After the experimental investigation, the GPC and OPC concrete's compressive strength shows similar trends at the 28 days strength, but the initial three days strength of the GPC strength is much higher than the OPC concrete, but around 28 days, the compressive strength of concrete mix got similar. The splitting tensile strength and flexural strength of the GPC specimens are slightly higher than the OPC concrete mix specimens. The OPC concrete's elastic modulus is slightly higher than the GPC mix design, whereas the Poisson ratio of the OPC concrete is slightly lower than the GPC mix designs. The GPC has less embodied energy compared to the OPC concrete. The cost of the GPC at a bulk level reduced the cost of up to 40% of the OPC concrete.

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Sodium hydroxide effect on the mechanical properties of flyash‐slag based geopolymer concrete

Cited by 87 publications

References 11 publications

Review on the Relationship between Nano Modifications of Geopolymer Concrete and Their Structural Characteristics

Review on the Relationship between Nano Modifications of Geopolymer Concrete and Their Structural Characteristics

Evaluation of the Effect of Granite Waste Powder by Varying the Molarity of Activator on the Mechanical Properties of Ground Granulated Blast-Furnace Slag-Based Geopolymer Concrete

Geopolymer Concrete: A Sustainable and Economic Concrete via Experimental Analysis

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