Effects of paraffin additives, as phase change materials, on the behavior of a traditional lime mortar

[Display omitted] •Direct incorporation of an organic PCM in lime mortar was used.•PCM reduces accessible porosity and increases mechanical strength.•PCM improves mortar durability against water and soluble salts.•PCM improves the thermal properties of the mortar.•Excessive PCM content has a negativ...

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Bibliographic Details
Published in:Construction & building materials 2022-12, Vol.361, p.129734, Article 129734
Main Authors: Feijoo, J., Alvarez-Feijoo, M.A., Fort, Rafael, Arce, Elena, Ergenç, Duygu
Format: Article
Language:English
Subjects:
Durability
Heat flux
Lime mortar
Phase change material
Physical properties
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Summary:[Display omitted] •Direct incorporation of an organic PCM in lime mortar was used.•PCM reduces accessible porosity and increases mechanical strength.•PCM improves mortar durability against water and soluble salts.•PCM improves the thermal properties of the mortar.•Excessive PCM content has a negative effect on the mortar structure. This study refers to the inclusion of phase change materials (PCMs) in porous building materials as an alternative means of improving their thermal behavior, assessing the changes caused in their physical–mechanical and durability properties. Specifically, an organic paraffin wax was selected for direct incorporation into lime mortars using different concentrations by weight. The results show that PCMs improve the thermal properties of the mortar while reducing its accessible porosity. This increases the mortars’ resistance to water and soluble salts. However, excessive PCM content causes stresses within the mortar that can jeopardize its structure.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2022.129734