Properties of the render FIXIT 222 and ist potential use...
Transcript of Properties of the render FIXIT 222 and ist potential use...
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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
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Content
Properties of Fixit 222
The historical mill of Sissach
Short presentation of Empa
Thermo-hygric simulations (WUFI)
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Properties of the render FIXIT 222
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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
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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
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Properties of Fixit 222
Sorption isotherm
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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
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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
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Properties of Fixit 222
Reaction to fire
Non-combustible A2-s1-d0 (EN 13501)
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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
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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
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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
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Demonstration object
Historical mill in Sissach (14th century)
Infrared images of the retrofitted façade
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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
]
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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
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Empa’s Research Focus Areas
Natural Resources
& Pollutants
Sustainable Built
Environment
Energy
Health &
Performance
Nanostructured
Materials
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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
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Thermo-hygric simulations
Norwegian climatic conditions
Oslo climate, cold year
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Thermo-hygric simulations
Outdoor boundary conditions
Oslo climate, solar radiation and wind driven rain
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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
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Thermo-hygric simulations
Total Water content of the wall
Quasi Steady State
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Thermo-hygric simulations
l-value depends on water content
Water content in the external F222 layer
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Thermo-hygric simulations
Temperature beneath the F222 layer
Quasi Steady State
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Thermo-hygric simulations
Rel. humidity beneath F222 layer
Quasi Steady State
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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
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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
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Thank you for your kind attention