Utilization of Waste Glass in Autoclaved Aerated Concrete

Walczak, Paweł; Małolepszy, Jan; Reben, M.; Szymański, Paweł; Rzepa, Karol

doi:10.1016/j.proeng.2015.10.040

Cited by 63 publications

(35 citation statements)

References 11 publications

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“…Many silica-based wastes have been evaluated to produce efficient cementitious materials such as: self-compacting concrete with waste marble dust [23]; concrete made with granite and marble as recycle aggregates [24]; concrete with high volumes of unprocessed lignite-coal fly ash and rice husk ash [25]; rice husk ash incorporated as a partial replacement for fine aggregate in concrete [26]; concrete produced from coal bottom ash [27]; waste brick as a partial replacement of cement in mortar [28]; concrete from alkali activated slag [29]; waste glass in autoclaved aerated concrete [30]; and, other uses. According to Mehta and Monteiro [31], the concrete can present twenty-seven variations, one of which is lightweight concrete.…”

Section: Introductionmentioning

confidence: 99%

Production of Aerated Foamed Concrete with Industrial Waste from the Gems and Jewels Sector of Rio Grande do Sul-Brazil

et al. 2017

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Abstract:The use of solid waste for the development of new building materials has been an alternative to reduce environmental impacts through the preservation of natural resources. In this context, this paper evaluates the possibility of using agate gemstone waste, called rolled powder, which basically consists of silica (SiO 2 ), in the manufacture of aerated foamed concrete blocks completely replacing the natural sand. Preformed foam was used as the air entrained by mechanical stirring with a mixture of natural foaming agents derived from coconut. To produce test specimens, the water/cement ratio and foam concentrations were varied, with three and four levels, respectively. The specimens were left for 28 days at room temperature to be cured, and then underwent analysis to determine their compressive strength, density, and the distribution of air-voids. The experiments demonstrated that the best water/cement ratio was 1.28 for 18% (of total solid mass) addition of foam, which generated a sample with a density of 430 kg/m 3 , and a compressive strength of 1.07 MPa. The result for compressive strength is 11% smaller than the requirements of the Brazilian standard (NBR 13438) for autoclaved aerated concrete blocks, but the results are promising.

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Section: Introductionmentioning

confidence: 99%

Production of Aerated Foamed Concrete with Industrial Waste from the Gems and Jewels Sector of Rio Grande do Sul-Brazil

et al. 2017

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“…The results showed that in all samples, tobermorite and calcium hydrosilicate phases were formed under hydrothermal conditions. The highest strength of the beams without a pore structure was reached with 1% glass replacement .…”

Section: Introductionmentioning

confidence: 94%

Options for the implementation of new secondary raw materials in autoclaved aerated concrete

2018

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Currently, the only material used as the primary siliceous component of autoclaved aerated concrete (AAC) in the Czech Republic is sand. Within the context of previously conducted research, this article evaluates the use of new types of secondary raw materials to achieve greater economic and ecological benefits during AAC production. The investigated secondary raw materials include fly and bottom ash, slag, and waste glass. AAC composite specimens with admixtures of secondary raw materials were cured by hydrothermal conditions in a laboratory autoclave for 7 and 12 h of isothermal durability 190 • C. Of the secondary raw materials tested under laboratory conditions, the highest strength was obtained in the specimen with a 10% waste glass admixture. The other admixture that positively affected the mechanical characteristics of specimens was waste incinerator slag. It is clear from the results of this investigation that the use of secondary raw materials does not diminish strength, but improves mixture rheology and supports the formation of tobermorite. K E Y W O R D Saerated autoclaved concrete, fluidized bed combustion ash, recycled glass, secondary raw material, slag

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“…Its quantity and quality then define the resulting material properties. [1][2][3][4][5][6] Secondary raw materials have been used in the production of lime-silicate composites for many years, in the process of research and application. However, most often these are ashes.…”

Section: Introductionmentioning

confidence: 99%

“…[3][4][5] Other, alternative secondary raw materials have been investigated so far on a smaller scale. For example, P. Walczak et al 6 focused on the possibility of using ground waste glass in the AAC technology. Their research suggests that glass has a potential for use in the AAC technology.…”

Section: Introductionmentioning

confidence: 99%

Monitoring the effect of quartz-sand replacement by amorphous-silica raw material on the microstructure of calcium silicate composites

Húšťavová¹,

Černý²,

Drochytka³

2020

Mater. Tehnol.

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Quartz sand is the main raw material for the production of autoclaved calcium silicate composites. However, its resources are rapidly dwindling and alternative siliceous raw materials need to be sought and tested for replacement. Most often, they are raw materials containing amorphous silica. Amorphous silica is more readily soluble than crystalline silica and may thus contribute to the formation of a superior microstructure of the calcium silicate composite through calcium hydrate phases. This paper is focused on determining the optimal replacement rate of the amorphous-silica raw material replacing the crystalline silica sand, while describing changes in the microstructure of calcium silicate composites. The replacement was graded at (0, 25, 50, 75 and 100) %. Hydrothermal-treatment conditions were based on a real production of autoclaved aerated concrete, so a temperature of 190°C and an isothermal holding time of 7 h were chosen. To study the effect of the ratio of raw materials on the microstructure, an X-ray diffraction analysis supported by scanning-electron-microscopy images was used.

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Utilization of Waste Glass in Autoclaved Aerated Concrete

Cited by 63 publications

References 11 publications

Production of Aerated Foamed Concrete with Industrial Waste from the Gems and Jewels Sector of Rio Grande do Sul-Brazil

Production of Aerated Foamed Concrete with Industrial Waste from the Gems and Jewels Sector of Rio Grande do Sul-Brazil

Options for the implementation of new secondary raw materials in autoclaved aerated concrete

Monitoring the effect of quartz-sand replacement by amorphous-silica raw material on the microstructure of calcium silicate composites

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