Effect of Hydrogen Peroxide on the Thermal and Mechanical Properties of Lightweight Geopolymer Mortar Panels

Lightweight geopolymers have been researched and used in specific applications due to their differentiated properties and, particularly, due to the lower environmental impacts in their manufacture, mainly associated with the use of raw materials with a low environmental impact and the reduction in g...

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Main Authors: Cleidson Alves, Fernando Pelisser, João Labrincha, Rui Novais
Format: Article
Language:English
Published: MDPI AG 2023-04-01
Series:Minerals
Subjects:
Online Access:https://www.mdpi.com/2075-163X/13/4/542
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author Cleidson Alves
Fernando Pelisser
João Labrincha
Rui Novais
author_facet Cleidson Alves
Fernando Pelisser
João Labrincha
Rui Novais
author_sort Cleidson Alves
collection DOAJ
description Lightweight geopolymers have been researched and used in specific applications due to their differentiated properties and, particularly, due to the lower environmental impacts in their manufacture, mainly associated with the use of raw materials with a low environmental impact and the reduction in greenhouse gas emissions. In this study, light geopolymers, using metakaolin, sodium silicate, sodium hydroxide, and hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), were evaluated. The effects of H<sub>2</sub>O<sub>2</sub> concentration were evaluated up to a concentration of 1% in pastes and mortars. The properties of thermal conductivity, density, compressive strength, and modulus of elasticity were determined. The simulation of the thermal transmittance of cladding panels applied to a facade was also performed. Mortars with a H<sub>2</sub>O<sub>2</sub> concentration of 0.2% obtained a compressive strength of 18 MPa and thermal conductivity of 0.55 W/mK, which was 60% less than the thermal conductivity obtained for the reference composition. The simulation of a panel for use on a facade showed that the thermal resistance increased from 0.27 (m<sup>2</sup>.K/W) to 0.42 (m<sup>2</sup>.K/W), indicating the efficiency of the geopolymer for use as a thermal control material.
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spelling doaj.art-20cce747a75042479ff53d2e3fe993a52023-11-17T20:36:09ZengMDPI AGMinerals2075-163X2023-04-0113454210.3390/min13040542Effect of Hydrogen Peroxide on the Thermal and Mechanical Properties of Lightweight Geopolymer Mortar PanelsCleidson Alves0Fernando Pelisser1João Labrincha2Rui Novais3Civil Engineering Department, Federal Institute of Santa Catarina—IFSC, Criciúma 88813-600, SC, BrazilCivil Engineering Department, Federal University of Santa Catarina—UFSC, Florianópolis 88040-900, SC, BrazilDepartment of Materials and Ceramic Engineering/CICECO, Campus Universitario de Santiago, University of Aveiro—UA, 3810-193 Aveiro, PortugalDepartment of Materials and Ceramic Engineering/CICECO, Campus Universitario de Santiago, University of Aveiro—UA, 3810-193 Aveiro, PortugalLightweight geopolymers have been researched and used in specific applications due to their differentiated properties and, particularly, due to the lower environmental impacts in their manufacture, mainly associated with the use of raw materials with a low environmental impact and the reduction in greenhouse gas emissions. In this study, light geopolymers, using metakaolin, sodium silicate, sodium hydroxide, and hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), were evaluated. The effects of H<sub>2</sub>O<sub>2</sub> concentration were evaluated up to a concentration of 1% in pastes and mortars. The properties of thermal conductivity, density, compressive strength, and modulus of elasticity were determined. The simulation of the thermal transmittance of cladding panels applied to a facade was also performed. Mortars with a H<sub>2</sub>O<sub>2</sub> concentration of 0.2% obtained a compressive strength of 18 MPa and thermal conductivity of 0.55 W/mK, which was 60% less than the thermal conductivity obtained for the reference composition. The simulation of a panel for use on a facade showed that the thermal resistance increased from 0.27 (m<sup>2</sup>.K/W) to 0.42 (m<sup>2</sup>.K/W), indicating the efficiency of the geopolymer for use as a thermal control material.https://www.mdpi.com/2075-163X/13/4/542lightweight geopolymereco-efficientmortar
spellingShingle Cleidson Alves
Fernando Pelisser
João Labrincha
Rui Novais
Effect of Hydrogen Peroxide on the Thermal and Mechanical Properties of Lightweight Geopolymer Mortar Panels
Minerals
lightweight geopolymer
eco-efficient
mortar
title Effect of Hydrogen Peroxide on the Thermal and Mechanical Properties of Lightweight Geopolymer Mortar Panels
title_full Effect of Hydrogen Peroxide on the Thermal and Mechanical Properties of Lightweight Geopolymer Mortar Panels
title_fullStr Effect of Hydrogen Peroxide on the Thermal and Mechanical Properties of Lightweight Geopolymer Mortar Panels
title_full_unstemmed Effect of Hydrogen Peroxide on the Thermal and Mechanical Properties of Lightweight Geopolymer Mortar Panels
title_short Effect of Hydrogen Peroxide on the Thermal and Mechanical Properties of Lightweight Geopolymer Mortar Panels
title_sort effect of hydrogen peroxide on the thermal and mechanical properties of lightweight geopolymer mortar panels
topic lightweight geopolymer
eco-efficient
mortar
url https://www.mdpi.com/2075-163X/13/4/542
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