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A Life Cycle Assessment of the Environmental Impacts of Cross-Laminated Timber

Svensson, Emma LU and Panojevic, David (2019) In TVBP VBEM01 20182
Construction Management
Abstract
Negative environmental impacts generated by new buildings and the built environment needs to be reduced in order to contribute to mitigation of anthropogenic global warming. Sustainable building certifications such as Miljöbyggnad and DGNB was introduced as a measure to transition into more sustainable buildings. The research study explores the environmental impacts of cross-laminated timber and the differences and effects in life cycle assessment of construction material in Miljöbyggnad 3.0 and DGNB. In addition, to study the impact of carbon sequestration for cross-laminated timber. The construction sector is taking measures to reduce environmental impacts from construction materials and consider increased use of alternative construction... (More)
Negative environmental impacts generated by new buildings and the built environment needs to be reduced in order to contribute to mitigation of anthropogenic global warming. Sustainable building certifications such as Miljöbyggnad and DGNB was introduced as a measure to transition into more sustainable buildings. The research study explores the environmental impacts of cross-laminated timber and the differences and effects in life cycle assessment of construction material in Miljöbyggnad 3.0 and DGNB. In addition, to study the impact of carbon sequestration for cross-laminated timber. The construction sector is taking measures to reduce environmental impacts from construction materials and consider increased use of alternative construction materials, such as cross-laminated timber. Cross-laminated timber is considered a versatile, renewable and sustainable structural construction material. The global warming potential is significantly reduced for cross-laminated timber if carbon sequestration, atmospheric carbon being stored in bio-mass, is accounted for. To minimize resource consumption, a circular approach regarding construction material and construction waste is necessary. Waste management is important for the overall environmental sustainability performance of buildings. There are three types of waste disposal, generally defined as either reuse, recycling or disposal. The environmental impacts for construction materials heavily depend on the chosen waste disposal scenario. Regarding cross-laminated timber, possible waste disposal scenarios is reuse, partial recycling and incineration with or without energy recovery. The most environmentally beneficial waste disposal scenario for cross-laminated timber is reuse while the worst is incineration without energy recovery. Cross-laminated timber shows the most environmental beneficial values for five out of the seven assessed environmental impacts in the DGNB life cycle assessment tool, compared to steel and concrete. The global warming potential is lower for cross-laminated timber regardless if carbon sequestration is included, for most waste disposal scenarios compared to steel and concrete. Identified differences in the life cycle assessments between Miljöbyggnad 3.0 and DGNB are the level of complexity, the number of included life cycle phases and assessed environmental impacts. An inclusion of carbon sequestration in a life cycle assessment will drastically decrease the global warming potential for cross-laminated timber. (Less)
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author
Svensson, Emma LU and Panojevic, David
supervisor
organization
course
VBEM01 20182
year
type
H3 - Professional qualifications (4 Years - )
subject
keywords
Life cycle assessment, Cross-laminated timber, Miljöbyggnad, DGNB, Environmental impact, End of life, Circular economy
publication/series
TVBP
report number
19/5580
ISSN
1651-0380
language
English
additional info
Handledare: Stefan Olander
Examinator: Urban Persson
id
8972045
date added to LUP
2019-03-06 10:03:49
date last changed
2019-10-07 14:33:37
@misc{8972045,
  abstract     = {Negative environmental impacts generated by new buildings and the built environment needs to be reduced in order to contribute to mitigation of anthropogenic global warming. Sustainable building certifications such as Miljöbyggnad and DGNB was introduced as a measure to transition into more sustainable buildings. The research study explores the environmental impacts of cross-laminated timber and the differences and effects in life cycle assessment of construction material in Miljöbyggnad 3.0 and DGNB. In addition, to study the impact of carbon sequestration for cross-laminated timber. The construction sector is taking measures to reduce environmental impacts from construction materials and consider increased use of alternative construction materials, such as cross-laminated timber. Cross-laminated timber is considered a versatile, renewable and sustainable structural construction material. The global warming potential is significantly reduced for cross-laminated timber if carbon sequestration, atmospheric carbon being stored in bio-mass, is accounted for. To minimize resource consumption, a circular approach regarding construction material and construction waste is necessary. Waste management is important for the overall environmental sustainability performance of buildings. There are three types of waste disposal, generally defined as either reuse, recycling or disposal. The environmental impacts for construction materials heavily depend on the chosen waste disposal scenario. Regarding cross-laminated timber, possible waste disposal scenarios is reuse, partial recycling and incineration with or without energy recovery. The most environmentally beneficial waste disposal scenario for cross-laminated timber is reuse while the worst is incineration without energy recovery. Cross-laminated timber shows the most environmental beneficial values for five out of the seven assessed environmental impacts in the DGNB life cycle assessment tool, compared to steel and concrete. The global warming potential is lower for cross-laminated timber regardless if carbon sequestration is included, for most waste disposal scenarios compared to steel and concrete. Identified differences in the life cycle assessments between Miljöbyggnad 3.0 and DGNB are the level of complexity, the number of included life cycle phases and assessed environmental impacts. An inclusion of carbon sequestration in a life cycle assessment will drastically decrease the global warming potential for cross-laminated timber.},
  author       = {Svensson, Emma and Panojevic, David},
  issn         = {1651-0380},
  keyword      = {Life cycle assessment,Cross-laminated timber,Miljöbyggnad,DGNB,Environmental impact,End of life,Circular economy},
  language     = {eng},
  note         = {Student Paper},
  series       = {TVBP},
  title        = {A Life Cycle Assessment of the Environmental Impacts of Cross-Laminated Timber},
  year         = {2019},
}