Sustainable New Brick and Thermo-Acoustic Insulation Panel from Mineralization of Stranded Driftwood Residues

Abstract

Abstract:There is considerable interest recently in by-products for application in green buildings. These materials are widely used as building envelope insulators or blocks. In this study, an experimental study was conducted to test stranded driftwood residues as raw material for possible thermo-acoustic insulation panel and environmentally sustainable brick. The thermal and acoustic characteristics of such a natural by-product were examined. Part of samples were mineralized by means of cement-based additive to reinforce the material and enhance its durability as well as fire resistance. Several mixtures with different sizes of ground wood chips and different quantities of cement were investigated. The thermo-acoustic in-lab characterization was aimed at investigating the thermal conductivity, thermal diffusivity, volumetric specific heat, and acoustic transmission loss. All samples were tested before and after mineralization. Results from this study indicate that it is possible to use stranded driftwood residues as building materials with competitive thermo-acoustic properties. In fact, the thermal conductivity was shown to be always around 0.07 W/mK in the unbound samples, and around double that value for the mineralized samples, which present a much higher volumetric specific heat (1.6 MJ/m 3 K) and transmission loss capability. The lignin powder showed a sort of intermediate behavior between the unbound and the mineralized samples.

Desempenho térmico-acústico-mecânico de um compósito de matriz cimentícia leve reforçado com casca de arroz

“…De maneira coincidente à literatura [29,30,31,32], o aumento da dimensão dos poros gerados pela adição da casca de arroz acarretou em uma melhoria significativa na absorção acústica do produto. Por outro lado, os resultados de isolamento acústico não foram estatisticamente diferentes aos resultados da matriz, também coincidente à literatura [30,31,33].…”

“…Além disso, dos 22 pontos analisados apenas em um houve sobreposição das faixas de dispersão, o que indica que há diferença estatisticamente significativa entre os valores médios. Segundo[29,30] a melhora do desempenho ocorre em virtude do aumento da dimensão dos poros, fato esse observado após a adição da casca de arroz (CA) na matriz (Figura 4).…”

Management of disposable surgical masks for tackling pandemic-generated pollution: Thermo-acoustic investigations and life cycle assessment of novel recycled building panels

“…In this view, an even more important topic for researchers worldwide is the production of good thermal insulation panels by using waste materials. There are already several studies in this area focused, for example, on reusing cellulose fibers from recycled paper products ( Hurtado et al., 2016 ), lignocellulosic fibers from stranded driftwood residues ( Pisello et al., 2016 ), recycled brick aggregate (RBA) from existing building elements ( Mankel et al., 2021 ), or even recycled textiles ( Islam and Bhat, 2019 ) or waste products from the food sector ( de Albuquerque Landi et al., 2020 ). Insulation panels for building applications, however, also need to ensure adequate acoustic performance, for contributing to a comfortable indoor environment ( Asdrubali et al., 2016 ; Caniato et al., 2021b ).…”

Experimental and Computational Study of Thermal Processes in Red Clays Exposed to High Temperatures

“…The energy savings efforts that have been adopted in most human activities have affected the brick production process as well. The current efforts therefore aim at an optimization of processes or material base to make brick production more efficient, cost effective, and environmentally-friendly [13,14]. For instance, Refaey et al [15] investigated the effects of brick setting arrangement, guide vane tape, or heat flow parameters on thermal performance of a kiln to optimize the cooling process.…”