Granular Cork Content Dependence of Thermal Diffusivity, Thermal Conductivity and Heat Capacity of the Composite Material/Granular Cork Bound with Plaster
“…The authors also proved a decrease in thermal conductivity and density. The same behavior was noticed by Abou Bakr Cherki [4] who studied the effect of adding cork on the thermal conductivity, thermal diffusivity and heat capacity of a composite material based on granular cork embedded in plaster. Their results show the interest of working with cork to reduce thermal conductivity and make a material that has a low heat transmission, compared to the plaster without cork.…”
Section: Introductionsupporting
confidence: 74%
“…Furthermore, the decline in density entrains a reduction in thermal conductivity. This dependence is always verified on materials with a plaster matrix and vegetable fibers according to Cherki et al [4] who used granular cork bound with plaster, and according to Ashour et al [27] who used matrix plaster reinforced by barley straws.…”
This paper presents an experimental and theoretical study of the thermo physical properties of date palm tree fiber-reinforced plaster composites. In this work, the thermal conductivity and diffusivity of composites are determined by the "DICO" method. The palm tree fibers are incorporated, without any preliminary treatment, into a plaster mixture. Four samples containing different percentages of palm tree fibers are realized (prepared) and examined. Furthermore, the interface of palm tree fibers is observed by Scanning Electron Microscopy (SEM). The experimental results show that the reinforcement of plaster by palm fibers decreases the thermal conductivity and diffusivity. Therefore, the measured thermal conductivity is compared with the theoretical models (serial model, parallel model, Krischer model and Willy and Southwick model).
“…The authors also proved a decrease in thermal conductivity and density. The same behavior was noticed by Abou Bakr Cherki [4] who studied the effect of adding cork on the thermal conductivity, thermal diffusivity and heat capacity of a composite material based on granular cork embedded in plaster. Their results show the interest of working with cork to reduce thermal conductivity and make a material that has a low heat transmission, compared to the plaster without cork.…”
Section: Introductionsupporting
confidence: 74%
“…Furthermore, the decline in density entrains a reduction in thermal conductivity. This dependence is always verified on materials with a plaster matrix and vegetable fibers according to Cherki et al [4] who used granular cork bound with plaster, and according to Ashour et al [27] who used matrix plaster reinforced by barley straws.…”
This paper presents an experimental and theoretical study of the thermo physical properties of date palm tree fiber-reinforced plaster composites. In this work, the thermal conductivity and diffusivity of composites are determined by the "DICO" method. The palm tree fibers are incorporated, without any preliminary treatment, into a plaster mixture. Four samples containing different percentages of palm tree fibers are realized (prepared) and examined. Furthermore, the interface of palm tree fibers is observed by Scanning Electron Microscopy (SEM). The experimental results show that the reinforcement of plaster by palm fibers decreases the thermal conductivity and diffusivity. Therefore, the measured thermal conductivity is compared with the theoretical models (serial model, parallel model, Krischer model and Willy and Southwick model).
“…Previous studies of composites based on plaster and ecological additives have also reported similar results. 33,34,35 Reinforcing plaster with ecological additives leads to materials with low ability to exchange heat with their environment compared to plaster alone.Figure 7.Thermal effusivity of the composites.…”
Thermal insulation is a good strategy for saving energy and reducing the emission of CO2 especially when produced locally with ecological materials. The hereby document aims at evaluating the thermal and mechanical properties of eco-composite materials based on plaster and wood waste or granular cork. The proportion of used additives were respectively 20 and 30%. Two wood waste types were used as sawdust and wood chips; several granular sizes were used for granular cork. The thermal characterization consists of determining the thermal conductivity, and thermal effusivity of all samples. Flexural and compressive strength were also tested. Results show that the composite materials with 20% wood shaving, 20% granular cork size 3.35–6.7 mm, and 30% sawdust have improved thermal performance with acceptable mechanical resistances. The thermal simulation proves that using these composite materials as plasterboards in buildings can generate thermal energy gain about 38%, compared to reference building. These results indicate that the use of ecological composites based on plaster has a promising future in thermal building insulation.
“…where, c p [J/kgK] is the specific heat at constant pressure, ρ[kg/m 3 ] is the density, and k[W/mK] is the thermal conductivity. For composite materials, α can be calculated by [30]:…”
Section: Experimental Results and Analysismentioning
In this paper, optical and mechanical excitation thermography were used to investigate basalt fiber reinforced polymer (BFRP), carbon fiber reinforced polymer (CFRP) and basalt-carbon fiber hybrid specimens subjected to impact loading. Interestingly, two different hybrid structures including sandwichlike and intercalated stacking sequence were used. Pulsed phase thermography (PPT), principal component thermography (PCT) and partial least squares thermography (PLST) were used to process the thermographic data. X-ray computed tomography (CT) was used for validation. In addition, signal-to-noise ratio (SNR) analysis was used as a means of quantitatively comparing the thermographic results. Of particular interest, the depth information linked to Loadings in PLST was estimated for the first time. Finally, a reference was provided for taking advantage of different hybrids in view of special industrial applications.
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