Thermal insulating plaster as a solution for refurbishing historic building envelopes: First experimental results

Bianco, Lorenza; Serra, Valentina; Fantucci, Stefano; Dutto, Marco; Massolino, Marco

doi:10.1016/j.enbuild.2014.11.016

Cited by 67 publications

(33 citation statements)

References 4 publications

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“…Bianco et al [9] showed the performance of thermal insulating plaster made from natural hydraulic lime of Wasselonne and vegetal aggregate materials derived from the waste of the corn production. Their study was performed on real buildings where this plaster is sprayed M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 on walls.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

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Hygric and thermal properties of hemp-lime plasters

Mazhoud

Collet

Prétot

et al. 2016

Building and Environment

124

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To cite this version:Brahim Mazhoud, Florence Collet, Sylvie Pretot, Julien Chamoin. Hygric and thermal properties of hemp-lime plasters.Building and Environment, Elsevier, 2016Elsevier, , 96, pp.206-216. 10.1016Elsevier, /j.buildenv.2015 M A N U S C R I P T A C C E P T E D AbstractHemp-lime mortars are generally used as indoor insulating plasters of building envelopes. They can be applied in thick coat to allow high enough hygrothermal performances to be reached in retrofit case. This study investigates hygric and thermal properties of two hemp-lime plasters. These plasters are made with the same lime-based binder and differ from their kind of hemp shiv. The two kinds of hemp shiv are defibered but one is smaller than the other. This experimental study is based on the measurement of sorption isotherm, water vapour permeability, moisture buffer value and thermal properties (conductivity and diffusivity). The effect of temperature on moisture buffer value and on thermal properties is also investigated. It is shown that hemp-lime plasters are hygroscopic and breathable materials. They are good hygric regulators according to the Nordtest classification and their moisture buffering ability is slightly impacted by temperature in the range from 11° to 23°C. The hemp-lime plaster with the smallest hemp M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT2 shiv is a better hygric regulator than the one with the biggest hemp shiv. Hemp-lime plasters show a quite low thermal conductivity, around 0.2 W/(m.K). The hemp-lime plaster with the smallest hemp shiv is slightly more conductive than the one with the biggest hemp shiv. The temperature does not impact thermal conductivity at dry state. At wet state, for a given relative humidity, when the temperature increases the thermal conductivity decreases simultaneously with water content. This study underlines that hemp-lime plasters show high hygrothermal qualities.

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Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

“…For sinusoidal variation of moisture content on the material surface, the penetration depth is given by equation (9): (9) Where d (p,1%) is the penetration depth (m), D m is the moisture diffusivity of the material (m²/s) and t p is the time period (s).…”

Section: Penetration Depthmentioning

confidence: 99%

Hygric and thermal properties of hemp-lime plasters

Mazhoud

Collet

Prétot

et al. 2016

Building and Environment

124

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“…These buildings generally need non-invasive retrofit techniques, such as insulating and/or phase-change-material plasters, internal wall insulation [46][47][48][49][50][51], specific solutions for PV or ST integration, etc.…”

Section: Current Energy Retrofit Interventionsmentioning

confidence: 99%

Seismic and Energy Renovation Measures for Sustainable Cities: A Critical Analysis of the Italian Scenario

Greca

Margani

2018

Sustainability

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Abstract:One of the main challenges of the twenty-first century is to increase the sustainability level of our cities. However, a town, to be considered sustainable, must, above all, be safe, particularly against natural hazards, which in Europe are mostly related to climate changes (e.g., hurricanes, floods, storms, and landslides) and seismic events (earthquakes). Unfortunately, sustainability is still not a prerogative of most European cities, especially those placed in seismic countries such as Italy, where at least 50% of the residential stock is earthquake-prone, while over 80% of the same stock is highly energy-consuming and carbon dioxide-emitting, thus contributing to trigger hazards related to climate changes. In this context, renovation actions, which combine both energy and seismic issues are strongly needed. Nevertheless, several technical, organizational and financial barriers considerably limit the real possibility to extensively undertake this kind of renovation. This study analyzes such barriers, with particular reference to the Italian scenario, suggesting and discussing possible solutions and underlining the advantages of increasing energy and seismic performances at the same time. The proposed solutions may be effectively extended to many other countries with similar socio-economic scenarios.

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“…Each historical building has different issues that need to be analyzed case by case (Annoni 1946) [9].…”

Section: Historical Buildings Insulation Recommendationsmentioning

confidence: 99%

Application of advanced insulating materials in historical buildings

Saio¹,

Nocentini²,

Tagliafico³

et al. 2017

IJHT

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Energy saving interventions for historical buildings require an accurate study on measures to be adopted and on the modalities of their application. This is in terms of energetic renovation with particular reference to historical, artistic and landscape profiles, considering that the substantial character and aesthetic aspects of the buildings are not to be changed. These types of buildings must be preserved and enhanced, beyond a binding adaptation to the regulation requirements. This study analyses the use of an innovative material, the silica aerogel, with the aim of achieving a high level of energy improvement. In many of the cases subject of numerical studies, buildings equipped with the aerogel-based thermal insulation show better hygro-thermal performance than when using other insulating materials. The objective of this study is to develop numerical models in Energy Plus, based on a targeted case study, to examine different exterior wall structures insulation and related energy behavior, considering defined assessment criteria such as heat losses, time lag, decrement factor, comfort index. The thickness dependency on annual heating set point, the heating and cooling load, and the operating costs are also investigated. The thermal performance of walls with aerogel-based insulation is compared with different insulating materials and configurations, applied on the historical building structure. Finally, a cost analysis for the different solutions, different climates, in retrofitting of historical buildings, is taken into consideration.

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Thermal insulating plaster as a solution for refurbishing historic building envelopes: First experimental results

Cited by 67 publications

References 4 publications

Hygric and thermal properties of hemp-lime plasters

Hygric and thermal properties of hemp-lime plasters

Seismic and Energy Renovation Measures for Sustainable Cities: A Critical Analysis of the Italian Scenario

Application of advanced insulating materials in historical buildings

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