Thermal Performance of Resource-Efficient Geopolymeric Mortars Containing Phase Change Materials

M. Kheradmand1, F. Pacheco-Torgal1, 2, *, M. Azenha3
1 C-TAC Research Centre, University of Minho, Guimarães, Portugal
2 SHRC, University of Sungkyunkwan, Suwon, Republic of Korea
3 ISISE, University of Minho, Guimarães, Portugal

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© 2018 Kheradmand et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the C-TAC Research Centre, University of Minho, Campus de Azurem, Guimarães, Portugal; Tel: 253-510200; E-mail:



Energy efficiency is not only the most cost effective way to reduce emissions but also a way to improve competitiveness and create employment. Geopolymeric mortars containing phase change materials-PCMs have a twofold positive impact concerning eco-efficiency. On one hand, the mortars are based on industrial waste contributing for resource efficiency. And on the other hand, PCM based mortars have the capacity to enhance the thermal performance of the buildings.


This paper reports experimental results on the thermal performance of geopolymeric mortars containing different percentages of phase-change materials-PCMs.


Five groups of alkali-activated based mortars with different PCM percentages were produced and placed on a panel within a small scale prototype for thermal performance testing.


The results show that the thermal conductivity of the mortars decreased with the increase in the percentage of the PCM.


Thermal performance of the PCM based mortars allowed for a stronger attenuation of the temperature amplitudes. Both for heating and cooling loads.

Keywords: Energy efficiency, Waste reuse, Fly ash, Geopolymers, PCMs, Thermal performance.