WG2 Eco efficiency

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WG2- Eco efficiency

• The eco-efficiency concept in environmental
  assessment of buildings
• Milan Veljkovic
• Structural Engineering- Steel Structure
• Civil and Environmental Engineering

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Environmental issues in buildings

• o Use of raw materials
• o Embodied energy
• o Recycled content
• o Recyclability
• o Indoor environment
• o Energy use in service
• Example Steel modulus Construction, by Joakim
  Widman, SBI, joakim.widman_at_sbi.se (The Swedish
  Institute of Steel Construction, www.sbi.se
  )
• -possible contribution to WP5
• Eco efficiency criteria as an added value for a
  building (examples of
• on-going projects)
• New material, EMC- energy modified cement

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Use of raw materials

• o The building products used in the construction
• o The materials used to produce the building
  products
• Parameters
• Raw materials from limited natural resources
• Raw materials from unlimited or renewable
  natural resources
• Raw materials from reused or recycled resources
• Toxic or restricted materials, and materials
  generating toxic waste
• Complex qualitative methodology and assessment
  methods
• Qualitative classification
• 1. Building products from reused or recycled
  products (1)
• 2. Building products from unlimited or
  renewable natural resources (2)
• 3. Building products from limited natural
  resources (3)

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Embodied energy

• Includes the amount of energy used for
• Production of construction material
• Transport of construction material
• Construction material used in
• the main framework and other structural load
  bearing elements,
• interior walls and facades
• Credit due to recycling performed (difference of
  energy used from virgin material and from
  recycled material)

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Recycled content

• Composed of
• amount of the input of recycled substance
• quality of the input of recycled substance
• in the building component.
• Recycled contents depend on production method.
• Quality (and the price) of the product depends
  on amount of recycled material.

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Recyclability

• Products possibility of being recycled as
• material
• energy
• product (reused).
• Down-cycling (deterioration in quality of
  recycled material).
• Measure
• reusability, including a product refinement
• material recyclability
• energy recyclability
• waste

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Indoor environment

• Quantitative description,
• Weighting factors, depends on project specific
  goals
• Moisture
• Air quality
• Magnetic field
• Human health

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Energy use in service

• Primary parameters
• Heating
• Cooling
• Ventilation
• Electricity for the equipment installed
• Zero energy buildings.
• Air leakage, thermal bridging for verification
  of discrepancy from planned thermal insulation.

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Comparison
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Open House Bostadsmoduler i stor skala. Annestad
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On going project-contribution to WP5-
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Life Cycle Costing As a Tool for Promoting
Timber Frame Housing

• The use of Life Cycle Cost calculations might
  become an important tool for promotion of timber
  frame construction systems. Capturing stakeholder
  values is essential. Demands of clients and/or
  real-estate trustees must be identified and
  codified
• The aim of this project is to analyze and
  measure the impact of selecting timber as a frame
  material on the life-cycle cost of the
  multi-family building.

CONTACT Erika Levander, Ph.D. Student erika.leva
nder_at_ltu.se
WORKING GROUP Prof. Lars Stehn
Ph.D. Ylva Sardén
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Service life for wood-based components in volume
element houses

• Service life
• Operation and maintenance -

Design
Construction
Phase out
Sales
Time
Design decisions
Consequences
Basis of robust decision-making
Product safety and durability
Feedback

• During design, decisions are taken concerning
  choice of material, components and installations
  that affect the durability as well as operating
  and maintenance costs during the service life of
  a building structure.
• This project aims to establish if a prediction
  of critical cost and durability decision-making
  points can be used in the decision-making process
  when designing wood-based building products.

CONTACT John Meiling, Ph.D. Student john.meiling
_at_ltu.se
WORKING GROUP Prof. Lars Stehn
Ph.D. Helena Johnsson
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Life Cycle Cost for buildings from the
construction clients perspective

• Buildings represent today large and long lasting
  investment. But most commonly the production
  costs for a building are set to an minimum, which
  does not improve the life time performance.
• The project aims is to explore and indicate the
  different main parameters, which are needed to
  optimize a forecast over the life cycle cost for
  a building in the early design process.

CONTACT Jutta Schade, Ph.D. Student jutta.schade
_at_ltu.se
WORKING GROUP InPro Project
Prof. Thomas Olofsson Post. doc. Nina Ryde
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A new material-contribution to WP5(WP7)-

• Vladimir Ronin, Jan-Erik Jonasson, Lennart
  Elfgren,
• Luleå University of Technology
• www.emccement.com
• http//www.ltu.se/shb/d3974/1.16852

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Eco-Efficient Concrete

• Lower content of Portland Cement with maintained
  or improve characteristics (strength, durability)
  for the concrete
• Reduction of production energy (up to about
  40 )
• Reduction of greenhouse gases (up to about
  50 )
• 1 ton of Portland cement ? 0.8 tons of CO2

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• Main characteristics of EMC for UHPC
• ultra high rate of strength development in wide
  range of curing temperature
• high strength of the cement paste and concrete,
  which exceed 200 MPa
• lower porosity and more finer pore size
  distributions
• the liberated heat is rapid, but it is lower per
  strength unit compared with the use of
  non-modified cement
• extremely high durability in very severe testing
  conditions

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Case studyBridge with Integral Abutment
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Case studyBridge with Integral Abutment
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Truck at mid-span pile top displacement
-9,1mm pile top
rotation -0,48 normal
force 327kN