Skip header and navigation

1 records – page 1 of 1.

Environmental and Economic Evaluation of Small-Scale Bridge Repair Using Cross-Laminated Timber Floor Slabs

https://research.thinkwood.com/en/permalink/catalogue2397
Year of Publication
2020
Topic
Design and Systems
Environmental Impact
Material
CLT (Cross-Laminated Timber)
Application
Bridges and Spans
Author
Iwase, Tetsuya
Sasaki, Takanobu
Araki, Shogo
Tomohumi, Huzita
Kayo, Chihiro
Organization
Tokyo University of Agriculture and Technology
Hokkaido University
Publisher
MDPI
Year of Publication
2020
Format
Journal Article
Material
CLT (Cross-Laminated Timber)
Application
Bridges and Spans
Topic
Design and Systems
Environmental Impact
Keywords
Floor Slabs
Life-Cycle Assessment
Greenhouse gas emissions
Waterproofing Treatment
Reinforced Concrete
Research Status
Complete
Series
Sustainability
Summary
Cross-laminated timber (CLT) has gained popularity worldwide in recent years, and its use in buildings and civil engineering structures has attracted attention in Japan. In this study, the life-cycle greenhouse gas (GHG) balance and costs associated with CLT floor slabs were evaluated with respect to small-scale bridge repair as the first instance of the use of CLT in civil engineering projects in Japan. Additionally, waterproofing treatment was applied to CLT slabs, and the potential GHG and cost reduction of CLT in comparison with reinforced concrete (RC) slabs were examined. GHG emissions were the smallest for non-waterproofed CLT slabs and the greatest for RC slabs. When replacing RC slabs with CLT slabs without waterproofing, fossil-derived GHG emissions can be reduced by 73 kg-CO2eq/m2 per slab, and fossil/wood-derived GHG emissions can be reduced by 67 kg-CO2eq/m2; however, the use of disposed CLT as fuel is essential. Moreover, a reduction in GHG emissions can be expected if RC slabs are replaced with CLT slabs that are waterproofed only once every 20 years. Further, the cost associated with RC slabs is 20% of that attributable to CLT slabs. Hence, measures need to be taken to reduce the cost of CLT and waterproofing materials.
Online Access
Free
Resource Link
Less detail