Powder sintering and gel casting methods in making glass foam using waste glass: A review on parameters, performance, and challenges

Siddika, Ayesha; Hajimohammadi, Ailar; Sahajwalla, Veena

doi:10.1016/j.ceramint.2021.10.066

Cited by 48 publications

(24 citation statements)

References 96 publications

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“…Geopolymer formation starts from the dissolution of silica and alumina out of the precursors, followed by their gelation, reorganization, and polymerization into geopolymer binders [111]. As a precursor, WG mainly releases SiO 2 and a small amount of Al 2 O 3 and CaO depending upon its chemical composition to contribute to the geopolymerization process [109,112,113]. The hydration products in glass-based geopolymers are different from those in high-Al and low-Ca geopolymer concretes (Figure 17) [114].…”

Section: Chemical Role Of Wg and Other Precursorsmentioning

confidence: 99%

“…However, for a high-calcium system, such as slag-based geopolymer concrete, the hydration products are generally C-S-H gels. Fly ash and calcined clay-based geopolymer concrete with WG can be regarded as a low-Ca system in which the main hydration products are N-A-S-H type gels with low Ca and high Al content [113,116]. For high-Ca fly ash-and slag-based systems, the dominant hydration products can be C-(N)-A-S-H gels [64], whereas the elemental chemistry of the solution favors the formation of SiO 2 -rich gels in a composite paste of alkali-activated WG and other precursors [33,109].…”

Section: Chemical Role Of Wg and Other Precursorsmentioning

confidence: 99%

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Roles of Waste Glass and the Effect of Process Parameters on the Properties of Sustainable Cement and Geopolymer Concrete—A State-of-the-Art Review

et al. 2021

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Recent research has revealed the promising potential of using waste glass (WG) as a binder or inert filler in cement and geopolymer concrete to deliver economic and environmental benefits to the construction sector. However, the outcomes obtained by different research groups are scattered and difficult to compare directly because of isolated process parameters. In this study, the roles and impacts of WG and process parameters on the performance of WG-added cement and geopolymer concrete are critically reviewed. This study reveals that the chemical and mineralogical composition, and particle size of WG, mix proportion, activation, and curing condition of concrete are the most important parameters that affect the dissolution behavior of WG and chemical reactivity between WG and other elements in concrete; consequently, these show impacts on properties of concrete and optimum WG level for various applications. These parameters are required to be optimized based on the guidelines for high pozzolanicity and less alkali–silica reactivity of WG in concrete. This review provides a critical discussion and guidelines on these parameters and the chemistry of WG in cement and geopolymer concrete for best practice and highlights the current challenges with future research directions.

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Section: Chemical Role Of Wg and Other Precursorsmentioning

confidence: 99%

Section: Chemical Role Of Wg and Other Precursorsmentioning

confidence: 99%

Roles of Waste Glass and the Effect of Process Parameters on the Properties of Sustainable Cement and Geopolymer Concrete—A State-of-the-Art Review

et al. 2021

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“…Studies of thermal transformations in WMS have expanded the understanding of polymineral technogenic material (Figure 3). The polymineral composition of the technogenic material determined the stepwise nature of thermal transformations, identified by the method of differential thermal The polymineral composition of the technogenic material determined the stepwise nature of thermal transformations, identified by the method of differential thermal The polymineral composition of the technogenic material determined the stepwise nature of thermal transformations, identified by the method of differential thermal analysis [28]. Pyrite and magnetite are oxidized in the temperature range 400-600 • C, as evidenced by the exothermic effect.…”

Section: Characteristics Of the Raw Materials Usedmentioning

confidence: 99%

“…Bernardo et al studied in detail Biosilicate glass-ceramic foams obtained as a result of the activation of refined alkalis and gel casting [27]. Siddika et al reviewed the parameters, productivity and problems of powder sintering and gel casting in the manufacture of foam glass using liquid glass [28]. Vaysman et al studied the recycling of foam glass in the production of building materials [29].…”

Section: Introductionmentioning

confidence: 99%

Foam Glass Crystalline Granular Material from a Polymineral Raw Mix

2021

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The article is devoted to the development of resource-saving technology of porous granular materials for energy-efficient construction. The relevance of the work for international research is to emphasize expanding the raw material base of porous lightweight concrete aggregates at the expense of technogenic and substandard materials. The work aims to study the processes of porization of glass crystalline granules from polymineral raw materials mixtures. The novelty of the work lies in the establishment of regularities of thermal foaming of glass crystalline granules when using waste of magnetic separation of skarn-magnetite (WMS) ores and lignite clay. Studies of liquid glass mixtures with various mineral fillers revealed the possibility of the formation of a porous structure with the participation of opoka, WMS and lignite clay. This is due to the presence in the materials of substances that exhibit thermal activity with the release of a gas phase. The foaming efficiency of the investigated materials increases when combined with glass breakage. The addition of WMS and lignite clay to the glass mixture increases the pore size in comparison with foam glass. The influence of the composition of raw mixtures on the molding and stability of granules is determined. The addition of sodium carbonate helps to strengthen the raw granules and reduce the softening temperature of the mass. The composition of the molding mixture of glass breakage, liquid glass and a multicomponent additive is developed, which provides an improvement in the molding properties of the glass mass, foaming of granules at a temperature of 750 °C. Foam glass crystalline granules have polymodal porosity, characterized by a density of 330–350 kg/m3, a compressive strength of 3.2–3.7 MPa, and a thermal conductivity of 0.057–0.061 W/(m·°C). Accordingly, the developed granules have a high potential use in structural and heat-insulating concretes.

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“…Increasing temperature causes the sintering of glass particles, the subsequent formation of a glass melt and the release of gaseous reaction products due to foaming agent reaction or thermal decomposition [2]. The porous structure is then fixed via rapid cooling and the resulting foams are either annealed and slowly cooled to allow for dissipation of stress in the case of foam glass blocks, or rapidly cooled to room temperature to cause the cracking and disintegration of the material to produce lightweight foam glass aggregate [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Glass-Ceramic Foam from Clay-Rich Waste Diatomaceous Earth

et al. 2022

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In this study, the potential use of waste diatomaceous earth from the production of diatomaceous earth for filtration purposes, as an alternative raw material for foam glass production, was explored. The chemical and mineralogical composition and the high temperature behavior of waste diatomite were studied to assess its suitability for foam glass production. Glass-ceramic foams were prepared using NaOH solution as a foaming agent, via a hydrate mechanism. The influence of different pretreatments and firing temperatures on the foam’s structure, bulk density and compressive strength was investigated. High temperature behavior was studied using TG/DTA analysis and high temperature microscopy. Phase composition was studied using X-ray diffraction analysis. Glass-ceramic foam samples of a high porosity comparable to conventional foam glass products were fabricated. The pretreatment temperature, foaming temperature and sintering holding time were found to have a significant influence on foam properties. With increased pretreatment temperature, pyrogenic carbon from the thermal decomposition of organic matter contained in the raw material acted as an additional foaming agent and remained partially unoxidized in prepared foams. The bulk densities of prepared samples ranged from 150 kg/m3 to 510 kg/m3 and their compressive strengths were between 140 and 1270 kPa.

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Powder sintering and gel casting methods in making glass foam using waste glass: A review on parameters, performance, and challenges

Cited by 48 publications

References 96 publications

Roles of Waste Glass and the Effect of Process Parameters on the Properties of Sustainable Cement and Geopolymer Concrete—A State-of-the-Art Review

Roles of Waste Glass and the Effect of Process Parameters on the Properties of Sustainable Cement and Geopolymer Concrete—A State-of-the-Art Review

Foam Glass Crystalline Granular Material from a Polymineral Raw Mix

Preparation and Characterization of Glass-Ceramic Foam from Clay-Rich Waste Diatomaceous Earth

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