grant stratton integral engineering design low carbon business breakfast 150316
TRANSCRIPT
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Grant Stratton
Embodied Structural Carbon
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Operational Carbon
Whole Life Carbon
75% High Energy Building
Low Energy Building
25%
50% 50%
Embodied Carbon+
2019?25% 75%
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FinishesBuilding Services
Windows
Internals
Other
Foundation
Floor Structure
Roof
External WallsHeating
Electricity
Cooling
Other
Whole Life Cycle
Source: Sturgis Associates LLP Indicative Whole Life Carbon Emissions
Building = 50% Embodied Carbon
Structure = 25% Whole Life Carbon
Operational Carbon Embodied Carbon
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EXTRACTION
MANUFACTURE
TRANSPORTATION
CONSTRUCTION
DISPOSAL
CR
AD
LE T
O G
RA
VE
CR
AD
LE T
O S
ITE
CR
AD
LE T
O
GAT
E
Embodied Carbon Life Cycle
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Embodied Carbon
How Do We Measure Embodied Carbon?
•Cradle to Gate
-Carbon in the manufacture of the components
•Embodied carbon
=Carbon data KgCO2/Kg x Weight of material Kg
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•Materials
•How we use them
• Structural form
• Quantity
• Quality
• Source
Choices
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Concrete
•Concrete 2nd to water as the most consumed
substance on Earth
•One tonne of concrete is being used for each
human on earth every year
•Concrete accounts for 2.6% UK & 10% global
carbon dioxide emissions
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Pulverised Fuel Ash
Coal Fired Power Stations
•Concrete strength
•2 million tonnes of PFA/GGBFS is used annually in the UK.
•By replacing portland cement they reduce UK CO2
emissions by nearly 2 million tonnes annually.
•3 million tonnes of PFA is disposed to landfill
•We could double the amount currently used and this would
reduce CO2 emissions by a further 2 million tonnes annually
Concrete Strength and Cement Replacement
Ground Granulated Blast
Furnace Slag
Production of Iron
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Option Mix Volume TonnesCO2
Flat slab OPC 2700m3 1880
Flat slab 50% GGBS 2700m3 1450
Ribbed slab 50% GGBS 2100m3 1135
Carbon Comparison Concrete Frame
Overall carbon reduction 40%
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Steel
• Most recycled construction material
• ~90% of steel is recycled
• Demand for steel exceeds supply of scrap steel by factor 2 and has to be supplemented by new steel.
• All new steel contain ~ 40% recycled steel
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Tonnes of steel:
• Beijing: 45 000
• London: 4 500
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Sequestration: 0.9t C02 per m3 of timber. Timber
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Structural Timber
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Cross Laminated Timber CLT
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Kingswood Hub Alec French Architects
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Hayesfield Girls School White Design
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Hayesfield Girls School White Design
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Modcell Flying Factory
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Modcell Delivered to Site Pre-Rendered
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Hayesfield Girls School White Design
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Hayesfield Girls School White Design
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Hayesfield Girls School White Design
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Embodied Carbon Hayesfield School
-126
159
206217
-150
-100
-50
0
50
100
150
200
250
Nucleus(with sequestration)
Nucleus(without sequestration)
Concrete Scheme Steel scheme
Em
bo
die
d C
arb
on
, kg
CO
2e /
m2
Embodied carbon of structural components, compared to
equivalent steel and concrete schemes
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Hayesfield Girls School Carbon Sequestration
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Grant Stratton
Embodied Structural Carbon