Moisture behavior of polystyrene insulation in below-grade application

Cai, Shanshan; Zhang, Boxiong; Cremaschi, Lorenzo

doi:10.1016/j.enbuild.2017.10.067

Cited by 15 publications

(2 citation statements)

References 12 publications

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“…0.10 MPa of IB ( Table 4 ). Although polystyrene has great resistance to water absorption [ 53 ], rockwool suffers tremendous swelling when immersed in water or subjected to higher humidity conditions [ 6 , 54 ]. In this way, the PU75-CP45 composite material may be a valuable alternative for thermal insulation at humid environments.…”

Section: Resultsmentioning

confidence: 99%

Development of an Innovative Lightweight Composite Material with Thermal Insulation Properties Based on Cardoon and Polyurethane

Fernandes,

Ferreira,

Lopes

et al. 2023

Polymers

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The search for innovative and sustainable solutions to improve the energy efficiency of the construction industry has been a hot topic for researchers due to the tremendous impact of insulator materials in the thermal comfort of buildings. In the present work, an innovative lightweight composite material with thermal insulation properties was developed, for the first time, by using cardoon particles and polyurethane. The formulation of the composite material was optimized in terms of cardoon fraction and the polyol/isocyanate ratio, to achieve the best compromise between internal bond (IB) strength and thickness swelling (TS). The best performing composite was PU75-CP45, with 45 wt% of cardoon particles and 75% of isocyanate, achieving an IB of 0.41 MPa and a TS of 5.3%. Regarding insulation properties, the PU75-CP45 composite material exhibits a promising performance when compared to conventional construction industry materials by tuning its thickness. Additionally, the composite material presented very low emissions of volatile organic compounds and formaldehyde (bellow to legislation levels) and high resistance to biological degradation.

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Section: Resultsmentioning

confidence: 99%

Development of an Innovative Lightweight Composite Material with Thermal Insulation Properties Based on Cardoon and Polyurethane

Fernandes,

Ferreira,

Lopes

et al. 2023

Polymers

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“…Investigation of the thermal conductivity of insulation materials in different temperatures is important for efficient energy use. Recently, foam insulation materials have become especially popular due to their low thermal conductivity, and they are commonly used because the production technology of expanded polystyrene is easy, production cost is low [4], the pores of the material are closed, the material is waterproof, and they have low thermal conductivity due to the air contained within them [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The Numerical and Experimental Investigation of the Change of the Thermal Conductivity of Expanded Polystyrene at Different Temperatures and Densities

Doğan¹,

Tan

2019

International Journal of Polymer Science

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The determination of the thermal conductivity of insulation materials depending on which parameters in the application as well as the production is very important. In this direction, the parameters affecting thermal conductivity should be determined to improve the efficiency of the insulation materials. It is also a fact that expanded polystyrene blocks have different thermal conductivities at the same density value depending on the production process. In this study, it was determined, experimentally and numerically, that the thermal conductivity of expanded polystyrene material at different densities is dependent on which parameters and changes in temperature. Expanded polystyrene materials consist of blocks of 30×30 cm with density of 16, 21, and 25 kg/m3 and a thickness of 20 mm. Thermal conductivity measurements were performed in FOX 314 (Laser Comp., USA) operating in accordance with ISO 8301 and EN 12667 standards. The measurements were made for expanded polystyrene blocks at the average temperatures of 10°C, 20°C, 30°C, and 40°C. The numerical study has three stages as the acquisition of electron microscope images (SEM) of expanded polystyrene blocks, modeling of internal structure geometry with CAD program, and realization of solutions with a finite element-based ANSYS program. Findings from experimental and numerical studies and the parameters affecting thermal conductivity were determined. Finally, it is thought that numerical methods can be used to obtain a preliminary idea for EPS material in determining thermal conductivity by comparing the findings of experimental and numerical studies.

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