Properties of Gypsum-PCM Based Mortars for Interior Plastering of Construction Systems

Silva, Nelson; Aguiar, José; Bragança, L.; Freire, Maria Teresa; Cardoso, Isabel Pombo

doi:10.4028/www.scientific.net/msf.587-588.913

Cited by 8 publications

(7 citation statements)

References 1 publication

(1 reference statement)

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“…For the lime composition (L), with 10 wt.% of PCM, the mechanical strength remained stable, showing only a slight reduction however, with 20 and 30 wt.% of PCM increases, even surpassing the value of the reference mortar (0 wt.% PCM). These results, obtained with the aerial lime mortars are different from what is stated in other studies, where concrete and plaster are incorporation matrix for the PCM [14,15]. Hunger et al reported a mechanical strength loss of 30% in cement mortars for an addition of only 1 wt.% of PCM, with 5 wt.% the reduction is higher than 60%.…”

Section: Thermal Efficiency Measurementscontrasting

confidence: 63%

“…Cement products incorporating phase change materials exhibit high thermal performance so they are viable as a construction product [13]. The PCM is introduced in the cement and gypsum pastes as an emulsion, which implies a higher water content causing a mechanical strength reduction [14,15]. In the past years, several commercial products with latent heat storage capabilities (concrete and gypsum wallboards) appeared in the market.…”

Section: Introductionmentioning

confidence: 99%

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Latent heat storage in PCM containing mortars—Study of microstructural modifications

Lucas

Ferreira

Aguiar

2013

Energy and Buildings

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The incorporation of phase change materials (PCM) into traditional mortars give to these products the ability to store and release heat. In this way it is possible to reduce the energy consumption and improve the thermal comfort in buildings. The introduction of micro and nanomaterials in the mortars matrix can cause microstructural changes that need to be addressed in order to optimize the PCM addition. The relationship between the hardened state performance of different PCM-mortars, its internal microstructure and pore distribution as been observed for different binders such as lime, cement and gypsum. Their hardened state properties, microstructural modifications and heat storage capabilities were evaluated. The ability to store and release heat depends strongly on the size and distribution of internal pores and not only on the PCM content. Using a thermal efficiency test, an important correlation between thermal performance and the mortars microstructure was established, for mortars with 0-30% of PCM added.

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Section: Thermal Efficiency Measurementscontrasting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Latent heat storage in PCM containing mortars—Study of microstructural modifications

Lucas

Ferreira

Aguiar

2013

Energy and Buildings

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“…There are several papers published in the last years on gypsum-based mortars containing different PCM systems [55,56,58,59,60,61]. Even for this kind of binder, the good mechanical properties of gypsum were found to be severely compromised by the addition of a PCM system.…”

Section: Resultsmentioning

confidence: 99%

Applications of Sustainable Polymer-Based Phase Change Materials in Mortars Composed by Different Binders

et al. 2019

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Eco-sustainable, low toxic and low flammable poly-ethylene glycol (PEG) was forced into flakes of the porous Lecce stone (LS), collected as stone cutting wastes, employing a very simple cheap method, to produce a “form-stable” phase change material (PCM). The experimental PCM was included in mortars based on different binders (hydraulic lime, gypsum and cement) in two compositions. The main thermal and mechanical characteristics of the produced mortars were evaluated in order to assess the effects due to the incorporation of the PEG-based PCM. The mortars containing the PEG-based PCM were found to be suitable as thermal energy storage systems, still displaying the characteristics melting and crystallization peaks of PEG polymer, even if the related enthalpies measured on the mortars were appreciably reduced respect to pure PEG. The general reduction in mechanical properties (in flexural and compressive mode) measured on all the mortars, brought about by the presence of PEG-based PCM, was overcome by producing mortars possessing a greater amount of binder. The proposed LS/PEG composite can be considered, therefore, as a promising PCM system for the different mortars analyzed, provided that an optimal composition is identified for each binder.

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“…The use of cement and gypsum reveals decrease of mechanical strengths with the incorporation of PCM microcapsules. In order to solve this problem the study was made with aerial lime and gypsum as binders . The use of these two binders together reveals an interesting behavior and solved the problems founded with other binders.…”

Section: Materials Compositions and Fabricationmentioning

confidence: 99%

“…Latent heat thermal energy storage, through the incorporation of PCM, presents advantages such as narrow the gap between the peak and off‐peak loads, leveling the electricity demand, decreasing the load on the network and eventual supply failure; reduce operation costs by shifting the electrical consumption from peak periods to off‐peak periods; contribute to the interior thermal comfort in buildings, by using and storing solar . The benefit to the interior thermal comfort inside buildings is materialized by the phase change occurring in the PCM.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Type of Phase Change Materials Microcapsules on the Properties of Lime‐Gypsum Thermal Mortars

et al. 2013

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In a society with a high growth rate and increased standards of comfort arises the need to minimize the currently high energy consumption by taking advantage of renewable energy sources. The mortars with incorporation of phase change materials (PCM) have the ability to regulate the temperature inside buildings, contributing to the thermal comfort and reduction of the use of heating and cooling equipment, using only the energy supplied by the sun. However, the incorporation of PCMs in mortars modifies its characteristics. The main purpose of this study was the production and characterization of mortars with incorporation of two different PCMs. Specific properties of two PCMs, such as particle size, shape, and enthalpy, were determined, as well as the properties of the fresh and hardened state of the mortars. The proportion of PCM was 0, 10, 20, and 30% of the total mass of the solid particles. In order to minimize some problems associated with shrinkage and consequent cracking of the mortars, the incorporation of polyamide fibers and superplasticizer was tested. It was possible to observe that the incorporation of PCMs in mortars caused differences in properties such as compressive strength, flexural strength, and shrinkage. Even though the incorporation of PCM microcapsules resulted in an increase in the shrinkage, it was possible observe a significant improvement in mechanical properties.

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Properties of Gypsum-PCM Based Mortars for Interior Plastering of Construction Systems

Cited by 8 publications

References 1 publication

Latent heat storage in PCM containing mortars—Study of microstructural modifications

Latent heat storage in PCM containing mortars—Study of microstructural modifications

Applications of Sustainable Polymer-Based Phase Change Materials in Mortars Composed by Different Binders

Influence of the Type of Phase Change Materials Microcapsules on the Properties of Lime‐Gypsum Thermal Mortars

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