Rapid determination of the thermophysical properties of various materials. Method of the hot plane film

Mounanga, Pierre; Bastian, Guy; Bron, G.; Coue, Roger

doi:10.1051/epjap:2004010

Cited by 7 publications

(11 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 18 shows the evolution of the thermal properties versus the water content. The results are compared to those previously determined by Mounanga et al [1] and Delacre [2]. Although differences can be observed concerning the heat capacity for a water content of 0%, the values presented by Mounanga et al [1] and Delacre [2] are in good agreement for both parameters.…”

Section: Hfic Methods -Drying Sandsupporting

confidence: 51%

“…Its properties have already been given in [1]. The application of an electric potential difference between two points of a Teledeltos paper sheet creates an electric current able to heat the surface by Joule effect.…”

Section: Hfic Methods -Characteristics Of the Heating Filmmentioning

confidence: 99%

“…For materials with uniform thermophysical properties, only two thermocouples, centred on the heating film and on the opposite insulated face are sufficient to determine λ and ρC P (HF method - [1]). Analytical relations indeed link the difference between the temperature of the two thermocouples to λ and the slope of the temperature time evolutions to ρC P .…”

Section: Experimental Devicementioning

confidence: 99%

“…HF method, described by Mounanga et al [1] and already validated on glass plates, is used as a reference technique.…”

Section: Validation Testsmentioning

confidence: 99%

“…It is validated on wet clay and then applied to the study of hydrating cementitious matrices maintained at 294 ± 1 K under endogenous conditions (no water exchange with the exterior) during the first 24 hours of hydration. A peripheral thermal regulation system enables to maintain the matrix a e-mail: pierre.mounanga@univ-nantes.fr in quasi-constant temperature conditions since the hydration heat release can perturb the measurement [1]. The theoretical bases of the HnHW method consider the transient temperature field around a continuous line source dissipating a constant power in an infinite medium.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Determination of the thermophysical properties of evolutive porous media: application to Civil Engineering materials

Poullain

Mounanga

Bastian

et al. 2005

Eur. Phys. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

Abstract. The purpose of this paper is to describe the development and the use of two measurement techniques especially adapted to the rapid determination of the thermophysical properties of evolutive porous media. The first technique exploits the method of the "heated and non-heated wires" and is validated on wet clay by comparison with previous works [Mounanga et al., Eur. Phys. J. Appl. Phys. 26, 65 (2004)]. It is then used to quantify the evolution of both thermal conductivity and volumetric heat capacity of hardening cement pastes maintained at 294 ± 1 K. The second technique is based on the classical method of the "heating film" and a data treatment using forward calculation. This technique is first used to measure the properties of wellknown materials (hardened mortars, wet sand [Mounanga et al., Eur. Phys. J. Appl. Phys. 26, 65 (2004); Delacre, Ph.D. thesis, University of Artois, 2000] and glass [Bastian, Rev. Phys. Appl. 22, 431 (1987)] and then applied to media whose properties evolve both over time and through space (drying sand).

show abstract

Section: Hfic Methods -Drying Sandsupporting

confidence: 51%

Section: Hfic Methods -Characteristics Of the Heating Filmmentioning

confidence: 99%

Section: Experimental Devicementioning

confidence: 99%

“…HF method, described by Mounanga et al [1] and already validated on glass plates, is used as a reference technique.…”

Section: Validation Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Determination of the thermophysical properties of evolutive porous media: application to Civil Engineering materials

Poullain

Mounanga

Bastian

et al. 2005

Eur. Phys. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

show abstract

Transient Thermal Response of Lightweight Cementitious Composites Made with Polyurethane Foam Waste

2012

Self Cite

View full text Add to dashboard Cite

International audienceThe development of low-cost lightweight aggregate (LWA) mortars and concretes presents many advantages, especially in terms of lightness and thermal insulation performances of structures. Low-cost LWA mainly comes from the recovery of vegetal or plastic wastes. This article focuses on the characterization of the thermal conductivity of innovative lightweight cementitious composites made with fine particles of rigid polyurethane (PU) foam waste. Five mortars were prepared with various mass substitution rates of cement with PU-foam particles. Their thermal conductivity was measured with two transient methods: the heating-film method and the hot-disk method. The incorporation of PU-foam particles causes a reduction of up to 18 % of the mortar density, accompanied by a significant improvement of the thermal insulating performance. The effect of segregation on the thermal properties of LWA mortars due to the differences of density among the cementitious matrix, sand, and LWA has also been quantified. The application of the hot-disk method reveals a gradient of thermal conductivity along the thickness of the specimens, which could be explained by a non-uniform repartition of fine PU-foam particles and mineral aggregates within the mortars. The results show a spatial variation of the thermal conductivity of the LWA mortars, ranging from 9 % to 19 %. However, this variation remains close to or even lower than that observed on a normal weight aggregate mortar. Finally, a self-consistent approach is proposed to estimate the thermal conductivity of PU-foam cement-based composites

show abstract

Proportioning and characterization of lightweight concrete mixtures made with rigid polyurethane foam wastes

Mounanga¹,

Gbongbon²,

Poullain³

et al. 2008

Cement and Concrete Composites

Self Cite

183

View full text Add to dashboard Cite

International audienceThis paper presents the results of an experimental study concerning the incorporation of polyurethane (PUR) foam wastes into cementitious mixtures in order to produce lightweight concrete. A semi-empirical method is first proposed to predict the density of fresh PUR foam-based concrete mixtures. Seven concrete mixtures containing various PUR foam volume fractions (from 13.1% to 33.7%), and two reference concrete mixtures (without PUR foam) were prepared and characterized. In particular, their thermal and mechanical properties were determined. This permitted to quantify the influence of the PUR foam volume fraction on these parameters. Some specimens were maintained under water during 28 days, while the others were dried in air. The PUR-foam concrete thermal conductivity and compressive strength are, respectively, 2–7 times and 2–17 times lower than those of the reference mixture, depending on the volume fraction of PUR foam and on the curing conditions. Besides, the use of PUR foam in concrete implies a strong increase in the drying shrinkage and in the mass loss during the first seven days. These results can be related to the high porosity and the weak compressive strength of alveolar polyurethane

show abstract

Rapid determination of the thermophysical properties of various materials. Method of the hot plane film

Cited by 7 publications

References 9 publications

Determination of the thermophysical properties of evolutive porous media: application to Civil Engineering materials

Determination of the thermophysical properties of evolutive porous media: application to Civil Engineering materials

Transient Thermal Response of Lightweight Cementitious Composites Made with Polyurethane Foam Waste

Proportioning and characterization of lightweight concrete mixtures made with rigid polyurethane foam wastes

Contact Info

Product

Resources

About