Assessment of bio-aggregate concretes’ properties with rice residue

Amantino, Guilherme; Hasparyk, Nicole Pagan; Bonsembiante, Francieli Tiecher; Filho, Romildo Dias Tolêdo

doi:10.1016/j.jobe.2022.104348

Cited by 8 publications

(4 citation statements)

References 31 publications

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“…Natural vegetable fibers have shown excellent results in improving living conditions within a residence [3][4][5][6][7][8][9][10][11]. Natural fibers have been used as building materials, such as high-strength concrete [12][13][14][15], seismic reinforcements [16], and thermal insulation [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Rice Husk-Based Insulators: Manufacturing Process and Thermal Potential Assessment

Cigarruista Solís,

Chen Austin,

Deago

et al. 2024

Materials

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The development of bio-insultation materials has attracted increasing attention in building energy-saving fields. In tropical and hot–humid climates, building envelope insulation is important for an energy efficient and comfortable indoor environment. In this study, several experiments were carried out on a bio-insulation material, which was prepared by using rice husk as a raw material. Square rice husk-based insultation panels were developed, considering the ASTM C-177 dimensions, to perform thermal conductivity coefficient tests. The thermal conductivity coefficient obtained was 0.073 W/(m K), which is in the range of conventional thermal insulators. In a second phase of this study, two experimental enclosures (chambers) were constructed, one with rice husk-based insulation panels and the second one without this insulation. The measures of the temperatures and thermal flows through the chambers were obtained with an electronic module based on the ARDUINO platform. This module consisted of three DS18B20 temperature sensors and four Peltier plates. Daily temperature and heat flux data were collected for the two chambers during the dry season in Panama, specifically between April and May. In the experimental chamber that did not have rice husk panel insulation on the roof, a flow of up to 28.18 W/m2 was observed, while in the chamber that did have rice husk panels, the presence of a flow toward the interior was rarely observed. The rice husk-based insulation panels showed comparable performance with conventional insulators, as a sustainable solution that takes advantage of a local resource to improve thermal comfort and the reduction of the environmental impact.

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Section: Introductionmentioning

confidence: 99%

Rice Husk-Based Insulators: Manufacturing Process and Thermal Potential Assessment

Cigarruista Solís,

Chen Austin,

Deago

et al. 2024

Materials

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“…Faced with this problem, insulation materials based on biomass have a low energy consumption and reduce greenhouse gas (GHG) emissions 8 . As they have low thermal conductivity, forestry and agricultural residues can be used in composites with thermally insulating characteristics, 9,10 in addition to the proper disposal of these residues that choke industries and can cause damage to the environment 11 …”

Section: Introductionmentioning

confidence: 99%

“…8 As they have low thermal conductivity, forestry and agricultural residues can be used in composites with thermally insulating characteristics, 9,10 in addition to the proper disposal of these residues that choke industries and can cause damage to the environment. 11 Currently, the amount of waste generated by the agricultural and forestry industry is rapidly increasing worldwide. 12 It is estimated, for example, that rice production generated, in 2020 alone, 477 million tons of husk waste 13 without proper disposal.…”

mentioning

confidence: 99%

Fire reaction properties of bio‐based aggregates used in thermally insulated building components

et al. 2023

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Bio‐based aggregates can be seen as one of the promising alternatives to reduce the environmental impacts of buildings due to their lower carbon footprint and energy efficiency. They have great potential to be incorporated into inorganic matrices and produce insulating materials. However, there is a lack of information about the flammability of these materials. This work presents the results of an experimental investigation of the fire behaviour of bio‐based materials. In this study, wastes of bamboo, wood shavings and rice husk were used and were evaluated for their fire performance in the natural state and after treatment in an alkaline solution. The fire reaction properties were determined by using a Mass Loss Cone Calorimeter in order to obtain the parameters of heat release rate (HRR), total heat released (THR), effective heat of combustion (EHC), total mass loss (TML), ignition time (IT) and time of combustion (TC). In addition, physical characterization and thermogravimetric tests were carried out as well as scanning electron microscopy analyses. The results show that the alkaline treatment of the bio‐based aggregates is able to reduce the average HRR and the EHC of all bio‐aggregates but does not delay the ignition of these materials. Among the residues studied, rice husk presented the lowest peaks and averages of HRR, THR, total mass loss, EHC and time to flameout; however, the ignition occurred faster.

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“…Several experimental studies [8][9][10] have shown the low thermal conductivity of bio-based concrete. This is due to the high intra-particle porosity in plant particles and macro porosity in bio-based materials [11,12].…”

Section: Introductionmentioning

confidence: 99%

A Multi-Scale Numerical Simulation on Thermal Conductivity of Bio-Based Construction Materials

Huang

Abou-Chakra

Geoffroy

et al. 2022

Construction Materials

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Amid increasing concern about carbon emissions and energy consumption in the building industry, bio-based construction materials are one of the solutions, especially considering their excellent thermal insulation. This study aims to develop a multi-scale numerical model to analyze the effect of microstructure on the thermal conductivity of a bio-based construction material. To achieve this, the size, shape, orientation, porosity, and water saturation of the bio-aggregate were considered in this study. The results show that the thermal conductivity of the bio-based material increases significantly and nonlinearly with water saturation, in contrast to the parallel thermal conductivity of the transversely isotropic bio-aggregate, which increases linearly. The thermal conductivity of the bio-based material shows an anisotropy in different directions and it obtains a maximum at water saturation of 0.4. Analysis of inclusions with different shapes shows that the thermal conductivity in the compaction direction is almost independent of the shape, but not in the direction perpendicular to the compaction. The finite element results show that the heat flow tends to transfer along the bio-aggregate rather than across it. These findings help to better understand the effect of microstructure on thermal conductivity and then promote the application of bio-based concrete as an insulation material in buildings.

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Assessment of bio-aggregate concretes’ properties with rice residue

Cited by 8 publications

References 31 publications

Rice Husk-Based Insulators: Manufacturing Process and Thermal Potential Assessment

Rice Husk-Based Insulators: Manufacturing Process and Thermal Potential Assessment

Fire reaction properties of bio‐based aggregates used in thermally insulated building components

A Multi-Scale Numerical Simulation on Thermal Conductivity of Bio-Based Construction Materials

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