Developing a PCM-enhanced mortar for thermally active precast walls

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2018Author
Olivieri, Lorenzo
Tenorio, José Antonio
Revuelta Crespo, David
Suggested citation
Olivieri, Lorenzo;
Tenorio, José Antonio;
Revuelta Crespo, David;
Navarro Farré, Lidia;
Cabeza, Luisa F.;
.
(2018)
.
Developing a PCM-enhanced mortar for thermally active precast walls.
Construction and Building Materials, 2018, vol. 181, p. 638-649.
https://doi.org/10.1016/j.conbuildmat.2018.06.013.
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This work presents an experimental research on the thermal properties of novel cementitious mortars incorporating microencapsulated Phase Change Materials intended to be used as the innermost layer in a precast radiant building component actively controlled by an integrated hydronic system. The characterization was developed in two steps: the first one focused on the effects of different fine aggregates and admixtures for a fixed PCM content and the second one on the effect of changing the amount of PCM. Results show that using silica aggregates and antifoaming admixture outperform the other options, producing mortars with statistically significant higher thermal conductivities, diffusivities and effusivities. Besides, increasing the amount of PCM significantly reduces conductivity and diffusivity, but the effusivity is practically invariant. This suggests that the mortar design has to be defined by predominantly focusing on diffusivity, in order to achieve appropriate heat penetration rates and activation times for an efficient system operation.
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Construction and Building Materials, 2018, vol. 181, p. 638-649European research projects
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