Recycling of Silicon Carbide Sludge on the Preparation and Characterization of Lightweight Foamed Geopolymer Materials

This study used silicon carbide sludge (SCS) to prepare lightweight foaming geopolymer materials (FGPs) by the direct foaming method. Results showed that when the SCS replacement level was 10%, the bulk density of the lightweight FGPs with added foaming agent amounts of 0.5% and 2.0% was 0.59 and 0....

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Autores principales:	Kang-Wei Lo, Ya-Wen Lin, Ta-Wui Cheng, Kae-Long Lin, Wei-Ting Lin
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	foaming geopolymer foaming kinetic fire resistance silicon carbide sludge recycling Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/62006ea0cf39474ca7f7186082b4110b
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spelling	oai:doaj.org-article:62006ea0cf39474ca7f7186082b4110b2021-11-25T18:49:31ZRecycling of Silicon Carbide Sludge on the Preparation and Characterization of Lightweight Foamed Geopolymer Materials10.3390/polym132240292073-4360https://doaj.org/article/62006ea0cf39474ca7f7186082b4110b2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/4029https://doaj.org/toc/2073-4360This study used silicon carbide sludge (SCS) to prepare lightweight foaming geopolymer materials (FGPs) by the direct foaming method. Results showed that when the SCS replacement level was 10%, the bulk density of the lightweight FGPs with added foaming agent amounts of 0.5% and 2.0% was 0.59 and 0.49 g/cm<sup>3</sup>, respectively; at a curing time of 28 days, the lightweight FGPs with amounts of added foaming agent of 0.5% and 2.0% had bulk densities that were 0.65 and 0.58 g/cm<sup>3</sup>, respectively. When the SCS replacement level was 10%, and the amount of added foaming agent was 2.0%, the porosity ratio of the lightweight FGP increased from 31.88% to 40.03%. The mechanical strength of the lightweight FGPs with SCS replacement levels of 10% and 20% was 0.88 and 0.31 MPa, respectively. Additionally, when the amount of foaming agent increased to 2.0%, the thermal conductivity of the lightweight FGPs with SCS replacement levels of 10% and 20% were 0.370 and 0.456 W/m⋅K, respectively. When the curing time was 1 day, and the amount of added foaming agent was 0.5%, the reverse-side temperature of the lightweight FGPs with SCS replacement levels of 10% and 20% were 286 and 311 °C, respectively. The k value of the O<sub>2</sub> reaction decreased from 2.94 × 10<sup>−4</sup> to 1.76 × 10<sup>−4</sup> because the reaction system was affected by the presence of SiC sludge, which was caused the reaction to consume O<sub>2</sub> to form CO<sub>2</sub>. The results have been proposed to explain that the manufactured lightweight FGPs had a low thermal conductivity (0.370–0.456 W/m⋅K). Therefore, recycling of silicon carbide sludge in lightweight foaming geopolymer materials has potential as fire resistance material for the construction industry.Kang-Wei LoYa-Wen LinTa-Wui ChengKae-Long LinWei-Ting LinMDPI AGarticlefoaming geopolymerfoaming kineticfire resistancesilicon carbide sludgerecyclingOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 4029, p 4029 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	foaming geopolymer foaming kinetic fire resistance silicon carbide sludge recycling Organic chemistry QD241-441
spellingShingle	foaming geopolymer foaming kinetic fire resistance silicon carbide sludge recycling Organic chemistry QD241-441 Kang-Wei Lo Ya-Wen Lin Ta-Wui Cheng Kae-Long Lin Wei-Ting Lin Recycling of Silicon Carbide Sludge on the Preparation and Characterization of Lightweight Foamed Geopolymer Materials
description	This study used silicon carbide sludge (SCS) to prepare lightweight foaming geopolymer materials (FGPs) by the direct foaming method. Results showed that when the SCS replacement level was 10%, the bulk density of the lightweight FGPs with added foaming agent amounts of 0.5% and 2.0% was 0.59 and 0.49 g/cm<sup>3</sup>, respectively; at a curing time of 28 days, the lightweight FGPs with amounts of added foaming agent of 0.5% and 2.0% had bulk densities that were 0.65 and 0.58 g/cm<sup>3</sup>, respectively. When the SCS replacement level was 10%, and the amount of added foaming agent was 2.0%, the porosity ratio of the lightweight FGP increased from 31.88% to 40.03%. The mechanical strength of the lightweight FGPs with SCS replacement levels of 10% and 20% was 0.88 and 0.31 MPa, respectively. Additionally, when the amount of foaming agent increased to 2.0%, the thermal conductivity of the lightweight FGPs with SCS replacement levels of 10% and 20% were 0.370 and 0.456 W/m⋅K, respectively. When the curing time was 1 day, and the amount of added foaming agent was 0.5%, the reverse-side temperature of the lightweight FGPs with SCS replacement levels of 10% and 20% were 286 and 311 °C, respectively. The k value of the O<sub>2</sub> reaction decreased from 2.94 × 10<sup>−4</sup> to 1.76 × 10<sup>−4</sup> because the reaction system was affected by the presence of SiC sludge, which was caused the reaction to consume O<sub>2</sub> to form CO<sub>2</sub>. The results have been proposed to explain that the manufactured lightweight FGPs had a low thermal conductivity (0.370–0.456 W/m⋅K). Therefore, recycling of silicon carbide sludge in lightweight foaming geopolymer materials has potential as fire resistance material for the construction industry.
format	article
author	Kang-Wei Lo Ya-Wen Lin Ta-Wui Cheng Kae-Long Lin Wei-Ting Lin
author_facet	Kang-Wei Lo Ya-Wen Lin Ta-Wui Cheng Kae-Long Lin Wei-Ting Lin
author_sort	Kang-Wei Lo
title	Recycling of Silicon Carbide Sludge on the Preparation and Characterization of Lightweight Foamed Geopolymer Materials
title_short	Recycling of Silicon Carbide Sludge on the Preparation and Characterization of Lightweight Foamed Geopolymer Materials
title_full	Recycling of Silicon Carbide Sludge on the Preparation and Characterization of Lightweight Foamed Geopolymer Materials
title_fullStr	Recycling of Silicon Carbide Sludge on the Preparation and Characterization of Lightweight Foamed Geopolymer Materials
title_full_unstemmed	Recycling of Silicon Carbide Sludge on the Preparation and Characterization of Lightweight Foamed Geopolymer Materials
title_sort	recycling of silicon carbide sludge on the preparation and characterization of lightweight foamed geopolymer materials
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/62006ea0cf39474ca7f7186082b4110b
work_keys_str_mv	AT kangweilo recyclingofsiliconcarbidesludgeonthepreparationandcharacterizationoflightweightfoamedgeopolymermaterials AT yawenlin recyclingofsiliconcarbidesludgeonthepreparationandcharacterizationoflightweightfoamedgeopolymermaterials AT tawuicheng recyclingofsiliconcarbidesludgeonthepreparationandcharacterizationoflightweightfoamedgeopolymermaterials AT kaelonglin recyclingofsiliconcarbidesludgeonthepreparationandcharacterizationoflightweightfoamedgeopolymermaterials AT weitinglin recyclingofsiliconcarbidesludgeonthepreparationandcharacterizationoflightweightfoamedgeopolymermaterials
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Recycling of Silicon Carbide Sludge on the Preparation and Characterization of Lightweight Foamed Geopolymer Materials

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