Life cycle performance of Cross Laminated Timber mid-rise residential buildings in Australia

Jayalath, Amitha; Navaratnam, Satheeskumar; Ngo, Tuan; Mendis, Priyan; Hewson, Nick; Aye, Lu

doi:10.1016/j.enbuild.2020.110091

Cited by 63 publications

(20 citation statements)

References 51 publications

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“…The values obtained are in accordance with the requirements of NBR 15220 (ABNT, 2005), which recommends a value less than 2 W.m -1 .°C -1 so that the panel can hav e a thermal insulating char a cteristic. The results obtained in this research corroborate Asdrubali et al (2017) and Jayalath et al (2020) when stating that panels of the CLT type ha ve a satisfa ctory value for thermal conductivity, in relation to other materials traditionally used in construction. Examples include cement, masonry brick and gravel concrete, which have a thermal conductivity of 0.90; 0.60 to 0.70 and 2.0 W.m -1 .°C -1 respe ctively (Labora t ory of thermophysical properties and prototyping, 2020).…”

Section: Acoustic Analysis and Thermal Conductivitysupporting

confidence: 89%

Performance of cross laminated timber panels made of Pinus oocarpa and Coffea arabica waste

Furtini

Santos

Garcia

et al. 2021

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The growth of the civil construction sector, made necessary to develop alternative products made of sustainable materials. Within this context came the cross laminated timber panels (CLT), which are formed by gluing veneer arranged at 90°, which provide high strength and great versatility, as constructive elements. This research aimed to evaluate the chemical properties of the particles of both materials and evaluate the performance of CLT panels made with Pinus oocarpa and waste wood from Coffea arabica. The panels were made with three orthogonal layers with veneer of pine and coffee wood, using the phenol-formaldehyde (PF) adhesive with a spread rate of 0.35kgm -² and the hydraulic press with a pressure of 1,2×10 7 N.m -2 for 15 min. The physical, mechanical properties, acoustic and thermal performance of the panels were evaluated. There was a significant difference for water absorption in 2 and 24 hours. The panels produced only with coffee wood waste showed the lowest water absorption rates, corresponding to 10.2 and 33.3%, in 2 and 24 hours. In relation to the MOE, the panels made with varied veneer were statistically equivalent to each other and the panels made of pine blades showed a MOE corresponding to 3,33×10 7 N.m -2 . The same trend was observed for MOR, since the average value obtained for pine panels, corresponding to 1,35x10 8 N.m -2 was significantly higher. Panels made of coffee veneer and pine veneer showed no delamination. With regard to acoustic and thermal evaluation, all panels met the minimum requirements indicated in the standards, with emphasis on coffee wood waste, associated or not with pine wood.

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Section: Acoustic Analysis and Thermal Conductivitysupporting

confidence: 89%

Performance of cross laminated timber panels made of Pinus oocarpa and Coffea arabica waste

Furtini

Santos

Garcia

et al. 2021

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“…Among the wood-based materials used in buildings, cross laminated timber (CLT), for example, provides many advantageous properties, such as high fire resistance and good thermal insulation [ 86 ]. Jayalath compared the life cycle impacts of two types of building systems, i.e., reinforced concrete (RC) and CLT for mid-rise residential buildings [ 87 ]. The results showed that the EE value of the RC buildings was 51% higher compared to the EE value of the CLT.…”

Section: Materials’ Influence On Building Energy Efficiencymentioning

confidence: 99%

A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities

Cabral

Blanchet

2021

Materials

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The main goal of this study was to review current studies on the state of the art of wood constructions with a particular focus on energy efficiency, which could serve as a valuable source of information for both industry and scholars. This review begins with an overview of the role of materials in wood buildings to improve energy performance, covering structural and insulation materials that have already been successfully used in the market for general applications over the years. Subsequently, studies of different wood building systems (i.e., wood-frame, post-and-beam, mass timber and hybrid constructions) and energy efficiency are discussed. This is followed by a brief introduction to strategies to increase the energy efficiency of constructions. Finally, remarks and future research opportunities for wood buildings are highlighted. Some general recommendations for developing more energy-efficient wood buildings are identified in the literature and discussed. There is a lack of emerging construction concepts for wood-frame and post-and-beam buildings and a lack of design codes and specifications for mass timber and hybrid buildings. From the perspective of the potential environmental benefits of these systems as a whole, and their effects on energy efficiency and embodied energy in constructions, there are barriers that need to be considered in the future.

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“…LCA is an important tool for guiding the selection of building materials and operating systems and their specific environmental impacts and has been used by the building sector since 1990s [23]. There are several worldwide LCA studies on mass timber buildings [24][25][26][27], and all the results showed mass timber buildings have lower embodied carbon and other environmental impacts than alternative conventional buildings. WBLCA studies of mass timber buildings in the United States are limited [28,29], and some only focused on the cradle-to-site analysis, and the building operations and end of life stages were excluded [10,19].…”

Section: Introductionmentioning

confidence: 99%

Environmental Life-Cycle Assessment and Life-Cycle Cost Analysis of a High-Rise Mass Timber Building: A Case Study in Pacific Northwestern United States

Liang

Bergman

2021

Sustainability

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Global construction industry has a huge influence on world primary energy consumption, spending, and greenhouse gas (GHGs) emissions. To better understand these factors for mass timber construction, this work quantified the life cycle environmental and economic performances of a high-rise mass timber building in U.S. Pacific Northwest region through the use of life-cycle assessment (LCA) and life-cycle cost analysis (LCCA). Using the TRACI impact category method, the cradle-to-grave LCA results showed better environmental performances for the mass timber building relative to conventional concrete building, with 3153 kg CO2-eq per m2 floor area compared to 3203 CO2-eq per m2 floor area, respectively. Over 90% of GHGs emissions occur at the operational stage with a 60-year study period. The end-of-life recycling of mass timber could provide carbon offset of 364 kg CO2-eq per m2 floor that lowers the GHG emissions of the mass timber building to a total 12% lower GHGs emissions than concrete building. The LCCA results showed that mass timber building had total life cycle cost of $3976 per m2 floor area that was 9.6% higher than concrete building, driven mainly by upfront construction costs related to the mass timber material. Uncertainty analysis of mass timber product pricing provided a pathway for builders to make mass timber buildings cost competitive. The integration of LCA and LCCA on mass timber building study can contribute more information to the decision makers such as building developers and policymakers.

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Life cycle performance of Cross Laminated Timber mid-rise residential buildings in Australia

Cited by 63 publications

References 51 publications

Performance of cross laminated timber panels made of Pinus oocarpa and Coffea arabica waste

Performance of cross laminated timber panels made of Pinus oocarpa and Coffea arabica waste

A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities

Environmental Life-Cycle Assessment and Life-Cycle Cost Analysis of a High-Rise Mass Timber Building: A Case Study in Pacific Northwestern United States

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