Measurement of thermal conductivity, thermal diffusivity and heat capacity of highly porous building materials using transient plane source technique

Bouguerra, Ahmed; Aït‐Mokhtar, Abdelkarim; Amiri, Ouali; Diop, Michel Bakar

doi:10.1016/s0735-1933(01)00310-4

Cited by 113 publications

(53 citation statements)

References 20 publications

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“…This technique was developed by Gustaffson [32] during the 1990s and it is being used widely to characterize the thermal properties of construction materials [33]. It is found to yield rapidly and simultaneously, information on the thermal conductivity and thermal diffusivity [33][34][35][36][37].…”

Section: Thermal Evaluationmentioning

confidence: 99%

Thermal properties of lightweight dry-mix shotcrete containing expanded perlite aggregate

Liu

Apel

Bindiganavile

2014

Cement and Concrete Composites

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Section: Thermal Evaluationmentioning

confidence: 99%

Thermal properties of lightweight dry-mix shotcrete containing expanded perlite aggregate

Liu

Apel

Bindiganavile

2014

Cement and Concrete Composites

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“…The hot-disk technique is a transient plane source measurement method, developed by Gustafsson and co-worker [32,33] in the early 1990s and is now widely used for the determination of the thermophysical properties of building materials [34][35][36][37]. In this study, the experiments are performed with the patented Hot Disk TPS 1500 Thermal Constants Analyzer test system.…”

Section: Principles Of Measurement: Hot-disk and Heating-film Methodsmentioning

confidence: 99%

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

2012

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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

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“…Accordingly, LWPF has a lower reacti vity and more energy is needed for completing its polymerization. Resin-impregnated wood has a slightly higher onset temperature, maximal peak temperature, and reaction heat than that of neat resin powders because of the lower thermal conductivity of wood (Bouguerra et al 2001). Figure 3 shows the TGA and DTA curves of set PF and LWPF resins.…”

Section: Properties Of Synthesis Resinsmentioning

confidence: 99%

Properties of molding plates made with various matrices impregnated with PF and liquefied wood-based PF resins

Lee¹,

Lee²,

Hsu³

et al. 2013

Holzforschung

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Phenol (P) and phenol-liquefied wood (LW; Cryptomeria japonica, Japanese cedar) have been reacted with formalin and ammonium hydroxide as a catalyst to prepare alcohol-soluble phenol-formaldehyde (PF) resins named PF and LWPF, respectively. The resins prepared were dehydrated, diluted with ethanol, and impregnated into wood powders, filter papers, and cloths. The PF resinimpregnated matrix materials were then hot-pressed to form molding plates (MP) and their properties were tested. Differential scanning calorimetric (DSC) analysis shows that both PF and LWPF behave as hot-melting resins and are able to further condensation reactions to form a set resin. However, the maximal temperatures of LWPF are shifted to a higher temperature range compared with PF. MPs made with LWPF-impregnated materials have poorer performance than that of PF. However, the bending strength of MP with filter paper is 96.8 MPa, which fits the request of CNS 10559. The MPs made of filter papers have the best mechanical properties followed by MPs with wood powders and cloths.

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Measurement of thermal conductivity, thermal diffusivity and heat capacity of highly porous building materials using transient plane source technique

Cited by 113 publications

References 20 publications

Thermal properties of lightweight dry-mix shotcrete containing expanded perlite aggregate

Thermal properties of lightweight dry-mix shotcrete containing expanded perlite aggregate

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

Properties of molding plates made with various matrices impregnated with PF and liquefied wood-based PF resins

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