A Critical Review of Waste Glass Powder as an Aluminosilicate Source Material for Sustainable Geopolymer Concrete Production

Manikandan, P.; Vasugi, V.

doi:10.1007/s12633-020-00929-w

Cited by 49 publications

(17 citation statements)

References 74 publications

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“…This process necessitates the utilization of an alkali activator solution (AAS) to stimulate the SiO 2 and Al 2 O 3 components present in the aluminosilicate precursors, resulting in the formation of calcium aluminate silicate hydrate and sodium aluminate silicate hydrate gels. This stands in contrast to OPC, which generates calcium silicate hydrate gel within high-alkaline conditions [11].…”

Section: Introductionmentioning

confidence: 91%

Effect of varying molarity and curing conditions on the mechanical and microstructural characteristics of alkali activated GGBS binder

2023

Mater. Res. Express

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Geopolymer binder offers a more sustainable choice for producing concrete in comparison to traditional ordinary Portland cement (OPC). The substitution of geopolymer binder for construction practices can decrease carbon dioxide emissions by decreasing OPC usage and repurposing industrial waste materials like ground granulated blast furnace slag (GGBS), fly ash, red mud, silica fume. In order to assess the suitability of GGBS as a binding material, it is essential to conduct conventional tests like consistency, setting times, and compressive strength, which are widely employed in cement testing. This study produced alkali activated paste (AAP) from GGBS and an alkaline activator comprising sodium hydroxide at various molarities from 1M to 8M. This investigation focused on the compressive strength of alkali-activated GGBS-based AAP under varying alkali activation molarities and curing conditions, including ambient, hot air oven, and humidity chamber curing. Additionally, the end reaction products of AAP showing higher compressive strength were examined for scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) analysis. The experimental outcomes indicated that GGBS reduced the final setting time of AAP while increasing its compressive strength. Additionally, increasing the quantity of NaOH in the AAP increased its compressive strength. Furthermore, the research findings indicated that the mechanical properties of the alkali-activated GGBS-based material were notably influenced by the chosen curing conditions. Specifically, ambient curing demonstrated superior compressive strength, measuring at 47.06 MPa after 28 days, surpassing the results obtained from hot air oven curing and humidity curing.

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Section: Introductionmentioning

confidence: 91%

Effect of varying molarity and curing conditions on the mechanical and microstructural characteristics of alkali activated GGBS binder

2023

Mater. Res. Express

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“…Being a type of sodium carbonate, it is possible that it was generated due to an excess of activator in the formulation. Another possible explanation is the low solubility of the waste glass under these conditions, allowing the sodium compounds in the recycled solution to remain free and, consequently, available to react with the atmospheric CO2, generating this type of carbonate [30]. 3.1.4.…”

Section: Xrd Of the Alkaline Cementsmentioning

confidence: 99%

Stabilisation of a Plastic Soil with Alkali Activated Cements Developed from Industrial Wastes

et al. 2021

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The development of alternative materials for the construction industry, based on different types of waste, is gaining significant importance in recent years. This is mostly due to the need to increase sustainability of this heavily polluting activity, thus mitigating the dependence on, for instance, Portland cement. The present paper is related to the development of an alkaline activated cement (AAC) exclusively fabricated from industrial by-products (both precursor and activator). Coal combustion fly ash, a common residue from thermoelectric powerplants, and glass waste, from the manufacture of ophthalmic lenses, were used as precursors. These precursors were activated with a recycled alkaline solution, resulting from the cleaning of aluminium extrusion dies, instead of the more common commercial reagents usually applied for this type of binder. Several pastes were studied, combining the precursor and alkaline solution in different proportions. When the most-performing cements were defined, they were used to stabilise a cohesive soil. The experimental procedure and subsequent analysis were designed based on a Response Surface Methodology model, considering the Activator/Solids and Soil/Precursor ratios as the most relevant variables of the stabilisation process. It was observed that, depending on the type of alkaline cement used, there was an optimum precursor and activator contents to optimise the mechanical properties of the stabilised soil. The reliability of this prediction was especially dependent on the type of precursors and, also, on their respective dissolution process right before the homogenization with the soil, under the working conditions available.

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“…At the end of this production, 0.8 tons of CO 2 is released into the atmosphere. Cement production accounts for approximately 7%–8% of the world's CO 2 emissions 2 . The cause of 65% of global warming is CO 2 emission.…”

Section: Introductionmentioning

confidence: 99%

Effect of silica fume and waste rubber on the performance of slag‐based geopolymer mortars under high temperatures

Sağır

Karakoç

Özcan

et al. 2023

Structural Concrete

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In this study, the fire resistance of slag‐based geopolymer mortars was investigated and the effect of silica fume (SF) and waste rubber (WR) on this resistance was determined. In slag‐based geopolymer mortars activated using 12M NaOH solution, 0%, 5%, and 10% by weight SF was substituted for slag; 0%, 5%, 10%, and 15% WR by volume were substituted for fine aggregate. The samples that completed the curing period were exposed to temperatures of 250°C, 500°C, and 750°C for 1 h, and the mechanical (compressive, flexural and splitting tensile strengths, and impact resistance), physical (weight change and sorptivity) and microstructure (scanning electron microscopy [SEM] and energy dispersive spectroscopy [EDS]) properties of these samples were examined. The compressive strengths of the samples without WR were between 48.10 and 60.97 MPa, and the samples without SF were between 28.52 and 48.10 MPa. Strength losses at 750°C were between 51.5% and 73.5%. As the SF substitution increased, the samples' mechanical and physical properties improved, whereas as the WR substitution increased, the samples' mechanical and physical properties declined. While the SF substitution had a positive effect on the fire resistance of the samples, the WR substitution had a negative effect. It is thought that the choice of geopolymer binder as a binder in the mortar and the use of waste tires as aggregate contribute to the literature in terms of both preventing environmental pollution and ensuring the recycling of these materials.

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A Critical Review of Waste Glass Powder as an Aluminosilicate Source Material for Sustainable Geopolymer Concrete Production

Cited by 49 publications

References 74 publications

Effect of varying molarity and curing conditions on the mechanical and microstructural characteristics of alkali activated GGBS binder

Effect of varying molarity and curing conditions on the mechanical and microstructural characteristics of alkali activated GGBS binder

Stabilisation of a Plastic Soil with Alkali Activated Cements Developed from Industrial Wastes

Effect of silica fume and waste rubber on the performance of slag‐based geopolymer mortars under high temperatures

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