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PHASE CHANGE MATERIAL CEMENT-LIME MORTARS FOR THERMAL RETROFITTING OF FACADES



Author(s): C. Guardia, G. Barluenga, I. Palomar
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference
on Bio-Based Building Materials
Editor(s): Sofiane AMZIANE, Mohammed SONEBI and Karine CHARLET
ISBN:
e-ISBN: 978-2-35158-192-6
Publisher: RILEM Publications SARL
Publication year: 2017
Pages: 652-656
Total Pages: 5
Language : English


Abstract: The poor thermal performance of many dwelling units built from 1940 to 1980 produces a low
energy efficiency under the present thermal standards. In order to fulfil comfort and energy
efficiency requirements, these facades need to be retrofitted. In many cases, External Thermal
Insulation Composite System (ETICS) are used to increase thermal insulation, although this
solution does not consider the thermal inertia. New mortars with improved thermal insulation and
inertia are investigated as an innovative solution. Twelve cement-lime mortars were designed,
using: white cement, air lime, siliceous aggregate (0-4 mm), lightweight aggregate (LWA)
(expanded perlite), short cellulose fibres and 10 and 20% of a Phase Change Material (PCM) -
microencapsulated paraffin wax. PCM’s nominal melting temperature was 23 ± 1 °C. An
experimental program was carried out to assess the effect of PCM on the physical and thermal
performance of the mortars. Two different scenarios were considered to evaluate the
temperature effect on the PCM-mortar performance. Bulk density, open porosity, capillary
absorption, vapour permeability, thermal conductivity and compressive strength were
characterized. PCM produced significant changes on the mortar thermal properties and a
synergetic effect of PCM and LWA was identified.


Online publication :2017
Publication type :full_text
Public price (Euros) : 0.00


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