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Study of mechanical, acoustic, and microstructure properties of lightweight mortars produced with expanded clay

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Autor(es):
Becker, Ariane Roberto ; Ozaki e Silva, Camila Tiemi ; Lintz, Rosa Cristina Cecche ; Gachet, Luisa Andreia
Número total de Autores: 4
Tipo de documento: Artigo Científico
Fonte: MATERIALS TODAY-PROCEEDINGS; v. 65, p. 8-pg., 2022-08-16.
Resumo

The inclusion of alternative materials in concrete production is very efficient, having a sustainable bias and improving the main properties of concrete. Expanded clay has been used to produce mortar and con-crete, partially replacing the aggregate with the main purpose of reduces specific mass and the weight of the structure, also improves acoustic and thermal characteristics. This study proposes the use of expanded clay to a lightweight laying and coating mortar compared to conventional mortars. It was investigated the influence of expanded clay as a substitute for conventional fine aggregate in mortars in ratios of (5, 10, 15, and 20) %. Tests were carried out in the fresh (consistency index, mass density, incorporated air, and water retention) and hardened states (flexion tensile strength, axial compression, apparent mass density, and potential tensile adhesion strength) based on the Brazilian Technical Standards Association (ABNT). The microstructure was also investigated using a scanning electron micro-scope (SEM). The results show that the replacements improved the strength of the mortars, being 20% higher than expected by the standard. Expanded clay is a sustainable alternative and adds new properties (thermal and acoustic) to mortars. Copyright (c) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Confer-ence on Advances in Construction Materials and Structures. (AU)

Processo FAPESP: 18/12076-5 - Estudo da absorção acústica de barreiras de concreto contendo resíduos de borracha e vermiculita
Beneficiário:Rosa Cristina Cecche Lintz
Modalidade de apoio: Auxílio à Pesquisa - Regular
Processo FAPESP: 18/14945-0 - Concreto autoadensável leve com argila expandida e poliestireno expandido
Beneficiário:Luísa Andréia Gachet
Modalidade de apoio: Auxílio à Pesquisa - Regular