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Institute for Environment and Development STØ
Flat roof case - Optiroc Finland/Fibo Exclay Eesti
1. Water barrier2. Concrete slab 30-40 mm or roofing slab made of LWA concrete slabs (60 x 250 x 600 mm)3. Waxed paper4. LWA insulation 360-450 mm, LWA fraction 8-20 mm5. Vapour barrier6. Load bearing construction
Institute for Environment and Development STØ
Purpose• Get to know our products better• Use the results to compare against our competitors (sales argument)• The study helps to protect the environment if the results are used in the company.• Support for marketing
Institute for Environment and Development STØ
FunctionThe function of the product is important for defining the functional unit. Following the LCA guideline, the function of the product was described as:
’to keep the roof watertight and insulate the construction with minimal maintenance requirements.’
The functional unit for this case is 1 m2 of a main roof construction, with a 100 year life.
Institute for Environment and Development STØ
The Flat Roof Life Cycle
Concrete
Vapour barrier
LWA
TRP lwa
Water barrier (Bitumen)
TRP bitumen
TRP concrete
Maintenance (life span 100 years)
Demolition
Flat main roof
Eaves
Ventilation Waxed paper
Replace bitumen 2 times
0,094%
0,094%
Not included
Not included
TRP to recyclingTRP to landfill
TRP to reuse
RecyclingLandfill
Reuse
Institute for Environment and Development STØ
The main ingredients of the roof
kg/m2% Cut-off criteria: < 1%
Vapour barrier 0,2 0,09 Not taken into considerationLWA 110,0 51,79Waxed paper 0,2 0,09 Not taken into considerationConcrete 92,0 43,31Water barrier 10,0 4,71
Total weight 212,4 100,00
Institute for Environment and Development STØ
Data usedRaw materials Bitumen Data from Eurobitume report 99/007, may 1999. Eco-
profile for Bitumen Production from Crude OilExtraction to a storage tank in a refinery.
Concrete Data from Finncement, production site Pargas.Production and emission figures from 1993. (STØ-project 1995).
LWA Data from production site Kuusankoski, 1999.Vapour barrier Assumed negligible.Waxed paper Assumed negligible.
Maintenance Maintenancebitumen
Replace water barrier, bitumen, 2 times (every 33year).
End of life Demolition No data.Recycling No emissions data, only quantity.Landfill No emissions data, only quantity of industrial waste.Reuse No emissions data, only quantity.
Transportation LWA Heavy goods vehicle, Finland*: >16 tonnes loadingcapacity. 130 km
Bitumen (waterbarrier)
Medium goods vehicle, Finland*: 7,5-16 tonnesloading capacity. 35 km
Concrete Medium goods vehicle, Finland*: 7,5-16 tonnesloading capacity. 20 km
* Heavy and medium goods vehicle , Finland based on emissions from Norwegian lorries in 1997 and Finland’sdiesel production and distribution. References: Norwegian pollution control authority (report 99:04, 1997 data) andEuropean commision, MEET project.
Institute for Environment and Development STØ
ResultsEnergy consumption for the main steps in the life cycle
Energy Consumption
0
100
200
300
400
500
600
700
800
Raw materialsproduction
Construction Use/ maintenance End of life Total
MJ
Bioenergy (recycled)
Fossil energy (recycled)
Hydropower (primary)
Bioenergy (primary)
Nuclear energy (primary)
Fossil energy (primary)
Institute for Environment and Development STØ
Energy consumption for raw materials production
Energy Consumption
0
100
200
300
400
500
600
LWA Bitumen Concrete
MJ
Bioenergy (recycled)
Fossil energy (recycled)
Hydropower (primary)
Bioenergy (primary)
Nuclear energy (primary)
Fossil energy (primary)
Institute for Environment and Development STØ
Global Warming Potential for the main steps in the life cycle
Global Warming Potential
0
10
20
30
40
50
60
70
Raw materialsproduction
Construction Use/ maintenance End of life Total
kg
CO
2-e
qu
iva
len
ts
CO2 from recycled energy carriers
CO2-equivalents
Institute for Environment and Development STØ
Global Warming Potential for raw materials production
Global Warming Potential
0
5
10
15
20
25
30
35
40
LWA Bitumen Concrete
kg C
O2-
eq
uiv
ale
nts
CO2 from recycled energy carriers
CO2-equivalents
Institute for Environment and Development STØ
Eutrophication and Acidification for the main steps in the life cycle
Eutrophication and Acidification
0,00
0,20
0,40
0,60
0,80
1,00
1,20
1,40
1,60
Raw materialsproduction
Construction Use/ maintenance End of life Total
Eutrophication, O2-equivalents
Acidif ication, SO2-equivalents
Institute for Environment and Development STØ
Eutrophication and Acidification for raw materials production
Eutrophication and Acidification
0,00
0,20
0,40
0,60
LWA Bitumen Concrete
kg
Eutrophication, O2-equivalents
Acidif ication, SO2-equivalents
Institute for Environment and Development STØ
POCP for the main steps in the life cycle
Photochemical Ozone Creation Potential (Smog)
0
5
10
15
20
25
30
35
Raw materialsproduction
Construction Use/ maintenance End of life Total
g e
the
ne
-eq
uiv
ale
nts
Institute for Environment and Development STØ
POCP for raw materials production
Photochemical Ozone Creation Potential (Smog)
0
2
4
6
8
10
12
LWA Bitumen Concrete
g e
the
ne
-eq
uiv
ale
nts
Institute for Environment and Development STØ
Waste production for the main steps in the life cycle
Waste
0
10
20
30
40
50
60
70
80
90
100
Raw materialsproduction
Construction Use/maintenance
End of life Total
kg
Industrial waste
Hazardous waste