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
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Transcript
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 26th 2015
K. Ghazi Wakili, Senior Scientist, Empa, Dübendorf, Switzerland
T. Stahl, R&D Fixit Group, Holderbank, Switzerland
Content
Properties of Fixit 222
The historical mill of Sissach
Short presentation of Empa
Thermo-hygric simulations (WUFI)
Properties of the render FIXIT 222
Properties of Fixit 222
Main ingredients
hydraulic lime (hardens also in H2O)
hydrated lime (hardens by absorbing CO2)
white cement
Aerogel (SiO2)
mineral aggregates (ex. Perlite)
water retention agent
air-entraining agent
hydrophobizing agent
Properties of Fixit 222
Thermal conductivity
Thermal conductivity determined at 20°C and 50% r.H.
lD ≈ 0.028 W/(mK)
Compared to other insulation renderings at 20°C and 50% r.H.
l is a function of moisture content !
The yearly average water content will determine a correspondingly higher thermal conductivity.
28
Properties of Fixit 222
Sorption isotherm
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
Properties of Fixit 222
First Optimization
Thermal conductivity versus pressure in the plastering machine for different
mixtures
20
25
30
35
40
45
50
55
0 2 4 6 8
Pressure [bar]
Th
erm
al
co
nd
ucti
vit
y [
mW
/(m
K)]
,
Mixture A Mixture B Mixture C
Plastering machine with max 8 bar pressure
Properties of Fixit 222
Reaction to fire
Non-combustible A2-s1-d0 (EN 13501)
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
Demonstration object
Historical mill in Sissach (14th century)
External application:
5 cm of Fixit 222 on solid masonry wall (60 cm) without insulation
After retrofit Dec. 2014 Before retrofit 2012
Demonstration object
Historical mill in Sissach (14th century)
Position of temperature and relative humidity sensors
West façade (weather side) North façade
External
climate
Beneath
render
Demonstration object
Historical mill in Sissach (14th century)
Infrared images of the retrofitted façade
Demonstration object
Historical mill in Sissach (14th century)
Measured temperature and relative humidity
External Temp. Temp beneath F222 Dewpoint Temp beneath F222 Ext.rH rH beneath F222
Rel. H
um
idity [
%]
Tem
pera
ture
[°C
]
Empa within the ETH Domain
Board of the ETH Domain
Federal Department of Economic Affairs, Education and Research EAER
WSL Eawag PSI Empa ETHZ EPFL
Empa’s Research Focus Areas
Natural Resources
& Pollutants
Sustainable Built
Environment
Energy
Health &
Performance
Nanostructured
Materials
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
Thermo-hygric simulations
Norwegian climatic conditions
Oslo climate, cold year
Thermo-hygric simulations
Outdoor boundary conditions
Oslo climate, solar radiation and wind driven rain
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
Thermo-hygric simulations
Total Water content of the wall
Quasi Steady State
Thermo-hygric simulations
l-value depends on water content
Water content in the external F222 layer
Thermo-hygric simulations
Temperature beneath the F222 layer
Quasi Steady State
Thermo-hygric simulations
Rel. humidity beneath F222 layer
Quasi Steady State
Transient values calculated for all 12 months of the year by WUFI
Thermo-hygric simulations
Thermal transmittance coefficient U-value
U value
80% r.H.
Steady state
U value
Transient
(calculated)
in %
Existing brick wall 1.21 0.92 100
+ 5 cm ext. 0.39 0.33 36
+ 3 cm ext.
+ 2 cm int.
0.39 0.34 37
+ 5 cm ext. +
water repellent render
0.39 0.30 33
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
Thank you for your kind attention
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