Properties of the render FIXIT 222 and ist potential use ...aerogelnorge.no/.../02/...Fixit-Karim-Wakili-EMPA.pdf · Properties of the render FIXIT 222 and its potential use in building

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Welcome

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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