Properties of the render FIXIT 222 and its potential use in building retrofit -A case study in Switzerland -Simulation with Norwegian Climate data

Transcription

1 Willkommen Welcome Bienvenue Properties of the render FIXIT 222 and its potential use in building retrofit -A case study in Switzerland -Simulation with Norwegian Climate data Presentation in Oslo, Norway February 26 th 2015 K. Ghazi Wakili, Senior Scientist, Empa, Dübendorf, Switzerland T. Stahl, R&D Fixit Group, Holderbank, Switzerland

2 Content Properties of Fixit 222 The historical mill of Sissach Short presentation of Empa Thermo-hygric simulations (WUFI)

3 Properties of the render FIXIT 222

4 Properties of Fixit 222 Main ingredients hydraulic lime (hardens also in H 2 O) hydrated lime (hardens by absorbing CO 2 ) white cement Aerogel (SiO 2 ) mineral aggregates (ex. Perlite) water retention agent air-entraining agent hydrophobizing agent

5 Properties of Fixit 222 Thermal conductivity Thermal conductivity determined at 20 C and 50% r.h. l D W/(mK) Compared to other insulation renderings at 20 C and 50% r.h. 28 l is a function of moisture content! The yearly average water content will determine a correspondingly higher thermal conductivity.

6 Properties of Fixit 222 Sorption isotherm

7 Properties of Fixit 222 Vapor transmission resistance Water vapor resistance factor µ determines the material s reluctance to let water vapor pass through Low µ-value = low resistance to water vapor transmission Compared to other insulation materials at 20 C

8 Thermal conductivity [mw/(mk)], Properties of Fixit 222 First Optimization Thermal conductivity versus pressure in the plastering machine for different mixtures Mixture A Mixture B Mixture C Pressure [bar] Plastering machine with max 8 bar pressure

9 Properties of Fixit 222 Reaction to fire Non-combustible A2-s1-d0 (EN 13501)

10 Properties of Fixit 222 Further characteristics smooth insulating layer, variable in thickness simple processing on all geometrical shape/base resistant against deterioration and vermin greater acceptance from the monument preservation bodies reproduction of the historical appearance mineral based material

11 Demonstration object Historical mill in Sissach (14 th century) External application: 5 cm of Fixit 222 on solid masonry wall (60 cm) without insulation Before retrofit 2012 After retrofit Dec. 2014

12 Demonstration object Historical mill in Sissach (14 th century) Position of temperature and relative humidity sensors Beneath render External climate West façade (weather side) North façade

13 Demonstration object Historical mill in Sissach (14 th century) Infrared images of the retrofitted façade

14 Temperature [ C] Rel. Humidity [%] Demonstration object Historical mill in Sissach (14 th century) Measured temperature and relative humidity External Temp. Temp beneath F222 Dewpoint Temp beneath F222 Ext.rH rh beneath F222

15 Empa within the ETH Domain Federal Department of Economic Affairs, Education and Research EAER Board of the ETH Domain Eawag Empa EPFL ETHZ PSI WSL

16 Empa s Research Focus Areas Health & Performance Nanostructured Materials Natural Resources & Pollutants Energy Sustainable Built Environment

17 Thermo-hygric simulations Model for a typical Norwegian brick wall construction Scenario 1: The existing brick wall 36 cm Scenario 2: S1 + 5 cm F222 external Scenario 3: S1 + 3 cm F222 external + 2 cm F222 internal Scenario 4: S2 + water repellent final render

18 Thermo-hygric simulations Norwegian climatic conditions Oslo climate, cold year

19 Thermo-hygric simulations Outdoor boundary conditions Oslo climate, solar radiation and wind driven rain

20 Thermo-hygric simulations Indoor boundary conditions Indoor temperature with a lower (20 C) and upper (25 C) limit, Indoor rel. humidity with a lower (30 %) and upper (60%) limit

21 Thermo-hygric simulations Total Water content of the wall Quasi Steady State

22 Thermo-hygric simulations l-value depends on water content Water content in the external F222 layer

23 Thermo-hygric simulations Temperature beneath the F222 layer Quasi Steady State

24 Thermo-hygric simulations Rel. humidity beneath F222 layer Quasi Steady State

25 Thermo-hygric simulations Thermal transmittance coefficient U-value U value 80% r.h. Steady state U value Transient (calculated) in % Existing brick wall cm ext cm ext. + 2 cm int. + 5 cm ext. + water repellent render Transient values calculated for all 12 months of the year by WUFI

26 Thermo-hygric simulations Thermal transmittance coefficient U-value Calculated transient U-values for all scenarios Existing brick wall + 5 cm ext. + 3 cm ext. + 2 cm int. + 5 cm ext. +water repellent render

27 Thank you for your kind attention