Traditional, state-of-the-art and renewable thermal building insulation materials: An overview

Abu-Jdayil, Basim; Mourad, Abdel‐Hamid I.; Hittini, Waseem; Hassan, M.; Hameedi, Suhaib M.

doi:10.1016/j.conbuildmat.2019.04.102

Cited by 441 publications

(191 citation statements)

References 187 publications

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“…All these characteristics present positive asymmetries, but, due to the high degree of magnitudes, the higher values influence the average performance. These results also show that for the average thermal insulation mortar, although presenting higher mechanical performance than required by the EN 998-1 [7] (fc ≥ 0.40 MPa), the associated thermal conductivities are also high (classified as a T2, according to the same standard), even more so if λ is compared with EPS (λ~0.032 W•m −1 •K −1 [30]).…”

Section: Discussion Of the Uni And Bivariate Analysismentioning

confidence: 54%

“…As a consequence of its nanostructure and highly tortuous paths, the silica aerogel presents high thermal insulation due to the limitation of heat transport by radiation, convection, and conduction [27][28][29]. Therefore, the silica aerogel presents thermal conductivities between 0.012 and 0.021 W•m −1 •K −1 , which is lower than that of air at ambient pressure (0.026 W•m −1 •K −1 ), but it is also significantly lower than those of EPS (0.032 W•m −1 •K −1 ) [8,30] and cork granules (0.045 W•m −1 •K −1 ) [14].…”

Section: Introductionmentioning

confidence: 99%

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Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

et al. 2020

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This research provides a statistical analysis of the mechanical and physical properties of thermal insulating mortars developed in the laboratory and by the industry with and without the incorporation of nanomaterials. This was evaluated by carrying out a uni and bivariate analysis, principal components and factor analysis, cluster analysis, and the application of regression models. The results show that it is possible to find associations between these mortars’ properties, but also how these formulations’ development can be approached in the future to achieve better overall performance. They also show that the use of nanomaterials, namely silica aerogel, significantly improved the mortars’ thermal insulation capabilities, allowing us to obtain mortar formulations with thermal conductivities below the values presented by classic thermal insulating materials. Therefore, with this investigation, other researchers can support their product-development choices when incorporating nanomaterials to reduce mortars’ thermal conductivities, increasing their production efficiency, overall multifunctionality, and sustainability.

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Section: Discussion Of the Uni And Bivariate Analysismentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

et al. 2020

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“…The blue code in Figure 9 indicates the low thermal conductivity region where thermal conductivity is comparable to conventional insulators [ 30 ]. Since less thermal conductivity is desired, the samples annealed for one hour showed promising low thermal conductivities (0.074–0.086

), indicating that they can act as thermal insulators.…”

Section: Resultsmentioning

confidence: 99%

Thermal Insulation and Mechanical Properties of Polylactic Acid (PLA) at Different Processing Conditions

et al. 2020

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This work aims to provide an extensive evaluation on the use of polylactic acid (PLA) as a green, biodegradable thermal insulation material. The PLA was processed by melt extrusion followed by compression molding and then subjected to different annealing conditions. Afterwards, the thermal insulation properties and structural capacity of the PLA were characterized. Increasing the annealing time of PLA in the range of 0–24 h led to a considerable increase in the degree of crystallization, which had a direct impact on the thermal conductivity, density, and glass transition temperature. The thermal conductivity of PLA increased from 0.0643 W/(m·K) for quickly-cooled samples to 0.0904 W/(m·K) for the samples annealed for 24 h, while the glass transition temperature increased by approximately 11.33% to reach 59.0 °C. Moreover, the annealing process substantially improved the compressive strength and rigidity of the PLA and reduced its ductility. The results revealed that annealing PLA for 1–3 h at 90 °C produces an optimum thermal insulation material. The low thermal conductivity (0.0798–0.0865 W/(m·K)), low density (~1233 kg/m3), very low water retention (<0.19%) and high compressive strength (97.2–98.7 MPa) in this annealing time range are very promising to introduce PLA as a green insulation material.

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“…(e.g., cellulose, cotton, wood, pulp, cane, synthetic fibers, cork, foamed rubber, melamine foam, polystyrene, polyethylene, polyurethane, and other polymers) materials. Although the physicochemical stability of polymers generally makes them good heat insulators, their mechanical properties can be further improved or modified by the addition of inorganic fillers to afford composites with enhanced strength [2][3][4][5][6][7][8][9]. Moreover, heterogeneity the composite should be tested to confirm the isotropic behavior [10,11].…”

Section: Introductionmentioning

confidence: 99%

Mechanical behavior of Emirati red shale fillers/unsaturated polyester composite

2020

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Herein, we focus on the formulation of polymer-based heat insulators using natural local shale as a filler. The polymer composite was fabricated by blending unsaturated polyester resin with local natural Emirati shale of filler of different filler sizes and solidifying the obtained thermosetting blends. The prepared samples are subjected to compressive strength, flexural strength, and tensile strength tests. The obtained results indicate that these composites exhibit mechanical properties superior to those of commercial heat insulators and comparable with those of other building materials. Specially, the prepared composite features a much higher tensile strength (20-40 MPa) than conventional heat insulators (< 1 MPa).

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Traditional, state-of-the-art and renewable thermal building insulation materials: An overview

Cited by 441 publications

References 187 publications

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

Nanomaterials’ Influence on the Performance of Thermal Insulating Mortars—A Statistical Analysis

Thermal Insulation and Mechanical Properties of Polylactic Acid (PLA) at Different Processing Conditions

Mechanical behavior of Emirati red shale fillers/unsaturated polyester composite

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