Bio-composite panels from recycled wood chips for sustainable building applications
department or school: Applied Science, Faculty of
department or school: Civil Engineering, Department of
data provider: DSpace
degree campus: UBCV
creator: Ravi, Madhuvandhi
issued: 2019-08-22T21:21:33Z
issued: 2019
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Recycling waste materials as replacement for natural resources in building products could help in lowering the environmental impact of the construction industry, provided that their application and processing is properly engineered. Wood waste is one of the chief construction wastes in Canada and many other countries worldwide. In this study, a novel bio-composite panel made with recycled wood chips is presented and assessed. The bio-composite binder was a natural hydrated lime with addition of metakaolin. The inclusion of various additives such as sodium hydroxide, recycled wood ash, and magnesium-rich powder recycled from the cutting waste in the production of magnesium oxide boards, was also explored. The effects of different binder compositions and proportions on the microstructure of the binder, its compatibility with the wood chips, and the engineering properties of the final bio-composite product were investigated. Finally, the effect of different curing conditions is considered, including accelerated carbonation by CO₂ incubation. Following ASTM specifications, 3 replicates of 550 x 550 x 70 mm panels for each bio-composite formulation and curing condition were cast. Specimens were cut from the panel to test the mechanical and thermal properties. Extent of carbonation within the panel was analyzed by standard colouring observation after addition of phenolphthalein and compared with control specimens cured without CO₂ incubation. These analyses were supported by Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD) of the binders and the bio-composite to monitor the various reactions occurring in the binder, including hydraulic and pozzolanic reactions, carbonation and additional reactions. An optimised binder composition of lime and metakaolin was successfully designed based on the strength data obtained on binder pastes. The bio-composite produced by combining wood chips and the optimised binder possessed good mechanical and thermal properties. Whi…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/71402
note: BIO-COMPOSITE PANELS FROM RECYCLED WOOD CHIPS FOR SUSTAINABLE BUILDING APPLICATIONS by Madhuvandhi Ravi B.Tech., National Institute of Technology – Tiruchirappalli, 2017 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE FACULTY OF GRADUATE AND POSTDOCTORAL STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Vancouver) August 2019 © Madhuvandhi Ravi, 2019 ii The following individuals certify that they have read, and recommend to the Faculty of Graduate and Postdoctoral Studies for acceptance, a thesis/dissertation entitled: Bio-Composite Panels from Recycled Wood Chips for Sustainable Building Applications submitted by Madhuvandhi Ravi in partial fulfillment of the requirements for the degree of Master of Applied Science in Civil Engineering Examining Committee: Cristina Zanotti, Civil Engineering Supervisor Patrick McGrath, Civil Engineering Supervisory Committee Member iii Abstract Recycling waste materials as replacement for natural resources in building products could help in lowering the environmental impact of the construction industry, provided that their application and processing is properly engineered. Wood waste is one of the chief construction wastes in Canada and many other countries worldwide. In this study, a novel bio-composite panel made with recycled wood chips is presented and assessed. The bio-composite binder was a natural hydrated lime with addition of metakaolin. The inclusion of various additives such as sodium hydroxide, recycled wood ash, and magnesium-rich powder recycled from the cutting waste in the production of magnesium oxide boards, was also explored. The effects of different binder compositions and proportions on the microstructure of the binder, its compatibility with the wood chips, and the engineering properties of the final bio-composite product were investigated. Finally, the effect of different curing conditions is considered, including accelerated carbo…
has type: Thesis/Dissertation
date issued: 2019-11
is shown at: 10.14288/1.0380555
language: eng
degree discipline: Civil Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/71402