Date of Award
2024
Degree Type
Thesis
Degree Name
Master of Science in Civil Engineering (MSCE)
Department
Civil and Environmental Engineering
First Advisor
George Tsiatas
Abstract
As concerns about climate change and its extensive impacts continue to grow, the construction industry has become focus of attention due to its substantial role in contributing to carbon dioxide emissions and resource depletion. This research thesis delves into the potential of timber structures, particularly cross-laminated timber (CLT), to offer sustainable alternatives to traditional construction materials. The study is structured into two main parts: an examination of the long-term performance of CLT and an evaluation of its environmental impacts through life cycle assessment (LCA).
The initial section of the study focuses on the durability and mechanical integrity of CLT structures, emphasizing their capacity for long-term serviceability. This includes an in-depth analysis of the fatigue behavior of self-tapping screws used in CLT, which are pivotal for the structural reliability of timber buildings. The research identifies optimal angles and depths for screw insertion, which significantly enhance the load-bearing capabilities of these connections, thus contributing to the overall durability and safety of timber constructions.
In the second part, the environmental credentials of CLT are rigorously assessed through a comprehensive LCA. This analysis quantitatively compares the carbon footprints of a building constructed with CLT versus one built with the conventional material, concrete. The findings reveal that CLT reduces upfront carbon emissions due to its lower energy-intensive production processes and serves as a carbon sink, thus offsetting emissions throughout the building’s lifecycle. Additionally, the LCA highlights the benefits of using sustainably sourced CLT to reduce the overall environmental impact of construction activities.
By integrating detailed experimental research with environmental evaluation, this thesis substantiates the role of mass timber, particularly CLT, as a sustainable construction material that aligns with global efforts to mitigate climate change. It offers architects, builders, and policy-makers valuable insights into the advantages of incorporating timber in modern construction, paving the way for more sustainable building practices that significantly lessen the construction industry’s environmental footprint.
Recommended Citation
Tharmrasan, Arthiha, "CROSS-LAMINATED TIMBER FOR SUSTAINABLE CONSTRUCTION - LONG-TERM PERFORMANCE AND ENVIRONMENTAL IMPACTS" (2024). Open Access Master's Theses. Paper 2521.
https://digitalcommons.uri.edu/theses/2521