Pumice and lapillus scraps: New national environmental-friendly chance for the production of ceramic tiles

Altimari, Fabiana; Andreola, Fernanda; Benassi, Pier Paolo; Lancellotti, Isabella; Barbieri, Luisa

doi:10.1016/j.ceramint.2023.09.211

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…Furthermore, the ceramic industry is considered a heavy industry that consumes large amounts of mineral resources, such as high-quality sources of feldspar and quartz. These minerals and others have been increasingly depleted to the point of becoming exhausted (Marvila et al, 2021;Ogbonda and Onuchuku, 2021;Altimari et al, 2023). As a result, the ceramic industry already includes by-product recycling practices.…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have identified various silica-based wastes with the potential to partially replace feldspar, among the most reported being glass waste. However, although benefits in terms of cost reduction by improving the alkali content and reducing the firing temperature are obtained, effects such as permanent deformations and extent to the initial densification stage have also been identified, causing a lower sintering efficiency (Conte et al, 2020;Addis et al, 2023;Altimari et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

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Effect of binary raw materials replacement (quartz and feldspar) for porcelain chamotte on the electro-technical siliceous porcelain properties

Rodríguez,

Díaz-Tato,

López-Perales

et al. 2023

Front. Mater.

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The hurry for ecological practices and waste control has emerged as an obligation in modern times, demanding precise strategies to restrain waste accumulation and to stimulate recycling and reuse actions to lower the climate effect. The replacement of binary raw materials for porcelain chamotte waste in siliceous porcelain was studied to obtain eco-friendly high-voltage porcelain. Quartz and feldspar were progressively replaced by 5, 10, and 15 wt.% of porcelain chamotte in a conventional siliceous electro-technical porcelain composition. The replacement effect on sintered samples at 1250°C under industrial heat treatment was evaluated by measuring the linear shrinkage, bulk density, porosity, flexural strength, and microhardness technological properties. Phase analysis was carried out by X-ray diffraction. Microstructural characteristics were studied using a scanning electron microscope. The results showed that chamotte-containing samples reached bulk densities of about 2.36 g/cm3 and a porosity percentage near zero. The maximum flexural strength value at glazed states was 87.8 MPa, for 15 wt.% scrap-containing samples. X-ray diffraction studies revealed a higher mullite phase content in chamotte-containing samples. Scanning electronic microscopy images of the polished and etched specimens show the presence of quartz grains and secondary mullite needles embedded in a feldspathic vitreous matrix. The properties reached by the chamotte-containing samples are attractive since the values obtained in terms of flexural strength, density, and porosity are compared to those reported for conventional siliceous porcelain were obtained. The most noticeable result was observed in flexural resistance. The glazed porcelain bodies showed a flexural strength improvement of about 15%. Then, these porcelain compositions suggest an alternative to produce a more sustainable, affordable, and environmentally-friendly porcelain insulator product.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of binary raw materials replacement (quartz and feldspar) for porcelain chamotte on the electro-technical siliceous porcelain properties

Rodríguez,

Díaz-Tato,

López-Perales

et al. 2023

Front. Mater.

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Evaluating pumice as a sustainable raw material in porcelain tile production: impact on technical properties

Bayer Ozturk,

Karaca,

Kurama

et al. 2024

J Aust Ceram Soc

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Pumice, a porous rock resulting from the rapid cooling of tuff fragments during volcanic activity, exhibits a spongy texture and light color due to its low density. Found predominantly in Central Anatolia and Eastern Anatolia, it has drawn interest for industrial applications. This study delved into utilizing micronized pumice within the porcelain tile manufacturing process. Comparative analyses were conducted between formulations incorporating micronized pumice and the standard ceramic tile recipe. In place of feldspar, micronized pumice was introduced at concentrations of 3%, 5%, and 7%, while clay was substituted with micronized pumice at concentrations of 3%, 5%, 7%, and 10% by weight. The prepared bodies were fired in an industrial kiln at 1210 °C for 54 min, and various physical and mechanical properties were evaluated. These included viscosity, sieve residue, green strength pre-firing, firing shrinkage, water absorption, firing strength, and firing color after-firing. The results indicated that the samples incorporating micronized pumice closely matched the physical and mechanical properties of the standard porcelain tile. Phase and microstructural analyses revealed the presence of mullite and quartz phases. Notably, micronized pumice demonstrated promise as a substitute for clay or feldspar, with the optimal usage rate determined to be 7% in the porcelain tile recipe. This indicates that pumice has the potential to be an alternative raw material in the production of porcelain tiles.

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Sustainable glazes for ceramic tiles: Exploiting inertized man-made vitreous fibres waste as a resource

Sisti,

Guidetti,

Altimari

et al. 2024

Ceramics International

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Pumice and lapillus scraps: New national environmental-friendly chance for the production of ceramic tiles

Cited by 6 publications

References 16 publications

Effect of binary raw materials replacement (quartz and feldspar) for porcelain chamotte on the electro-technical siliceous porcelain properties

Effect of binary raw materials replacement (quartz and feldspar) for porcelain chamotte on the electro-technical siliceous porcelain properties

Evaluating pumice as a sustainable raw material in porcelain tile production: impact on technical properties

Sustainable glazes for ceramic tiles: Exploiting inertized man-made vitreous fibres waste as a resource

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