Thermomechanical Performance Assessment of Sustainable Buildings’ Insulating Materials under Accelerated Ageing Conditions

Pontinha, Ana Dora Rodrigues; Mäntyneva, Johanna; Santos, Paulo; Durães, Luísa

doi:10.3390/gels9030241

Cited by 14 publications

(8 citation statements)

References 52 publications

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“…In the same way, organic materials, in general, increase their thermal conductivity as their density increases (as demonstrated in this and other works). For this reason, it is essential to be able to calculate and report the optimal density at which to apply a material, especially if the blowing technique is being used [56][57][58].…”

Section: Thermal Conductivitymentioning

confidence: 99%

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Valorization of Wheat Crop Waste in Araucanía, Chile: Development of Prototype of Thermal Insulation Material for Blowing Technique and Geographical Analysis

2023

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Houses in the operational stage consume around 40% of the world’s energy, and most of it is consumed by air conditioning. This generates several problems, especially in cities, where biomass combustion is the most widely used form of heating. For this reason, environmental regulation works in parallel with energy efficiency, where efficient and low-impact thermal insulating materials are key to reduce the energy demand and fuel consumption to generate comfort in dwellings. This work considers the valorization of wheat straw from the Araucanía region of Chile, to develop a prototype for a thermal insulating material applied through the blowing technique. The results show the insulation potential of the fiber, which, in post-chopping conditions and at an average density of 80 [kg/m3], has thermal conductivity of 0.034 [W/mK]. This value is much better than that of glass wool and other inorganic materials sold in the Chilean market. In addition, the developed material can be incorporated into partitions using the blowing technique, improving the execution time for the thermal insulation section. Finally, it is indicated that a good option to install a processing plant is in the central valley of the region, specifically in the communes of Victoria and Perquenco.

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Section: Thermal Conductivitymentioning

confidence: 99%

“…For this reason, it is essential to be able to calculate and report the optimal density at which to apply a material, especially if the blowing technique is being used [56][57][58].…”

Section: Thermal Conductivitymentioning

confidence: 99%

Valorization of Wheat Crop Waste in Araucanía, Chile: Development of Prototype of Thermal Insulation Material for Blowing Technique and Geographical Analysis

2023

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“…Building materials are one of the key factors affecting the performance of building structures [1]. Concrete is a porous brittle material commonly used in civil engineering [2].…”

Section: Introductionmentioning

confidence: 99%

Damage Model of Carbon-Fiber-Reinforced Concrete Based on Energy Conversion Principle

Zheng,

Pang,

Sun

et al. 2024

J. Compos. Sci.

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In order to enhance the practical application of carbon-fiber-reinforced concrete (CFRC) in engineering, it is necessary to study the damage mechanism of CFRC. Experimental research on the mechanical properties of CFRC under multiple strain rates was conducted. Five different fiber contents were analyzed to study the compressive strength and tensile strength of CFRC, and the damage characteristics of CFRC under multiple strain rates were analyzed based on failure modes and energy changes. An energy-based damage constitutive model was established. The results showed the following: (1) When the carbon fiber content was 0.4%, CFRC had the best comprehensive performance, with a 15.02% increase in compressive strength and a 51.12% increase in tensile strength. With the increase in strain rate, the compressive strength of the concrete increased. (2) Under high strain rates, carbon fiber significantly enhanced the compressive strength of the concrete, and the input energy, elastic strain energy, and dissipated energy increased. The peak value of the elastic strain energy conversion rate increased, and the minimum value of the dissipated energy conversion rate decreased. (3) Under the same strain rate, the CFRC had a larger inflection point of dissipated energy corresponding to the strain compared to the reference group of concrete during the loading process. A constitutive model for CFRC was established based on damage mechanics and probability statistics. The research results will provide theoretical references for the application of carbon-fiber-reinforced concrete.

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“…To initiate the reuse of insulation materials such as MW, knowledge is first acquired about the missing long-term properties of this reused material. Manufacturers and researchers rely on accelerated aging tests to simulate the aging of various insulation materials [31][32][33][34][35][36][37][38]. However, to facilitate the practical reuse of insulation materials, it is essential to understand how these materials perform under real conditions.…”

Section: Introductionmentioning

confidence: 99%

Reusing Thermal Insulation Materials: Reuse Potential and Durability Assessment of Stone Wool Insulation in Flat Roofs

Acar,

Steeman,

Van Den Bossche

2024

Sustainability

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In the building renovation industry, a growing volume of discarded insulation materials, such as stone wool insulation, prematurely finds its way to landfills or incinerators after building demolitions. However, these materials often did not reach their complete service life potential, and the reuse of insulation materials is usually not considered in current building practices. This study provides a comprehensive overview of the potential challenges associated with repurposing stone wool insulation from existing flat roofs. By means of detailed assessments via dismantling and performance evaluations of collected stone wool insulation boards up to 28 years old, this research reveals the unavoidable damages that occur upon dismantling yet emphasizes that this does not impede reuse. While density and thermal performance remain stable over time, water absorption and mechanical stability are affected. In total, 48% of all short-term tests revealed an increase in water absorption, possibly due to hydrophobic substance degradation. Mechanical performances of aged SW insulation from flat roofs depend on various factors, with 43% and 33% of compression and puncture resistance tests, respectively, not meeting current standards. Beyond a durability assessment, this study advocates for a multidisciplinary approach, uniting materials science, construction engineering, and sustainability insights, to creatively repurpose used insulation materials into future projects.

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Thermomechanical Performance Assessment of Sustainable Buildings’ Insulating Materials under Accelerated Ageing Conditions

Cited by 14 publications

References 52 publications

Valorization of Wheat Crop Waste in Araucanía, Chile: Development of Prototype of Thermal Insulation Material for Blowing Technique and Geographical Analysis

Valorization of Wheat Crop Waste in Araucanía, Chile: Development of Prototype of Thermal Insulation Material for Blowing Technique and Geographical Analysis

Damage Model of Carbon-Fiber-Reinforced Concrete Based on Energy Conversion Principle

Reusing Thermal Insulation Materials: Reuse Potential and Durability Assessment of Stone Wool Insulation in Flat Roofs

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