Straw Based Materials for Building Retrofitting and Energy Efficiency

Liuzzi, Stefania; Rigante, Simona; Ruggiero, F.; Stefanizzi, Pietro

doi:10.4028/www.scientific.net/kem.678.50

Cited by 8 publications

(2 citation statements)

References 12 publications

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“…To compare the thermal conductivities of the straw boards with those of other straw bio-based materials and investigate the applicability of the fitting formula, the data scatters for the λ of straw bales and composites from the previous studies [4,8,9,13,15,25,28] are shown in Figure 8 versus ρ. As stated in the Introduction, the densities of straw bales and composites in previous studies are within a small range.…”

Section: Discussionmentioning

confidence: 99%

Experimental Investigation on Thermal Conductivity of Straw Boards Based on the Temperature Control Box—Heat Flux Meter Method

Sun

Zheng

et al. 2023

Sustainability

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Straw boards are the environmentally-friendly and sustainable materials used for building envelopes. To validate a novel alternative test method of thermal conductivity (λ), temperature control box–heat flux meter method (TCB-HFM), and better understand the thermal properties of straw boards, experimental investigation on two types of straw boards using such a method was carried out. Moreover, the control test via the conventional guarded hot plate method (GHP) was conducted to provide a benchmark. Results show that the fluctuation amplitudes of the temperature difference and heat flux density for the TCB-HFM during the steady state are much smaller than a generally acceptable limitation of 5%, and a 5.9% deviation of λ between the two test methods is in a reasonable range. It is indicated that the TCB-HFM can be regarded as an alternative test method to conduct investigations on the thermal properties of materials. Furthermore, the correlation between density and λ is explored and expressed by a linear fitting formula with the determination coefficient (R2) of 0.9193, and the formula is verified to have the feasibility to predict the λ of different types of straw bio-based materials.

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Section: Discussionmentioning

confidence: 99%

Experimental Investigation on Thermal Conductivity of Straw Boards Based on the Temperature Control Box—Heat Flux Meter Method

Sun

Zheng

et al. 2023

Sustainability

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“…The composites with sodium silicate demonstrated the highest resistance, avoiding mold growth at high relative humidity levels. Besides its several benefits, it has also shown some drawbacks, such as high hygroscopicity and low moisture resistance [45,48], which could cause the degradation of the materials [49]. Furthermore, it could be less eco-efficient than other adhesives (i.e., bio-based ones or natural glues).…”

Section: Introductionmentioning

confidence: 99%

Hygroscopicity and Morphology of Bio-Based Boards—The Influence of the Formulation

Cintura,

Nunes,

Molari

et al. 2024

Applied Sciences

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The internal structures and the hygroscopicity of bio-based boards consisting of giant reed (Arundo donax L.) and hazelnut shells as bio-aggregates, and a sodium silicate solution as the adhesive, were investigated. The aim was to evaluate the influence of each material (the bio-aggregates and adhesive) and their distributions in the boards on the final performance. By carrying out X-ray computed tomography, the internal structures and the porosities of the boards were determined, allowing important considerations of their hygroscopicity. The voids’ percentages were between 26% and 36% of the total volume of the composites. Both the materials and the composites demonstrated high hygroscopicity. In particular, the mixtures of the bio-aggregates and the sodium silicate allowed reaching a moisture buffering value of 7.44 g/(m2%RH) for the A. donax-based composite, 3.86 g/(m2%RH) for the hazelnut-shell-based composite, and 4.65 g/(m2%RH) for the mixture-based composite. Besides the identification of the contributions of the materials, a detailed discussion of the assessed properties was carried out to use these bio-based boards in vernacular historic construction. The results show how the aggregate type and the adhesive content affected the final behavior, demonstrating the importance of a conscious material choice. Furthermore, helpful information for the future development of these types of bio-based boards and their possible optimization was provided.

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Organic wastes as a sustainable alternative to synthetic thermal insulating materials

Indwar,

Titiksh

2024

Environ Dev Sustain

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Straw Based Materials for Building Retrofitting and Energy Efficiency

Cited by 8 publications

References 12 publications

Experimental Investigation on Thermal Conductivity of Straw Boards Based on the Temperature Control Box—Heat Flux Meter Method

Experimental Investigation on Thermal Conductivity of Straw Boards Based on the Temperature Control Box—Heat Flux Meter Method

Hygroscopicity and Morphology of Bio-Based Boards—The Influence of the Formulation

Organic wastes as a sustainable alternative to synthetic thermal insulating materials

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