Mechanical and structural behaviour of rubberised recycled aggregate concrete
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Hossain, F M Zahid
issued: 2024-12-16T21:47:45Z
issued: 2024
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: This research examined the impact of using recycled coarse aggregate (RCA), crumb rubber (CR), and polypropylene fibre (PPF) as partial replacements for traditional concrete coarse and fine aggregates. Through a series of experiments, the study assessed the compressive strength, tensile strength, and flexural response of recycled aggregate concrete with CR and PPF in comparison to natural aggregate concrete. Further tests examined the bond strength of concrete with steel reinforcement, aiming to optimise resource use, and investigated the shear behaviour of concrete beams containing RCA, CR, and PPF. The findings contributed insights into the potential of these recycled materials to create more sustainable concrete solutions. The study found that increasing crumb rubber (CR) content resulted in reduced compressive, tensile, and flexural strength while adding polypropylene fibre (PPF) improved these properties. For toughness and ductility, PPF had the most significant positive effect, with both RCA and CR enhancing these aspects when added incrementally. In bond analysis, combining CR and PPF reduced concreteâs bond with steel reinforcement, though using either material alone in certain RCA mixtures improved bond strength. Shear strength tests showed that CR reduced shear strength, post-diagonal cracking resistance, toughness, and deformability in concrete beams, but adding PPF enhanced these effects at up to 30% RCA replacement. The optimal composition (30% RCA, 5% CR, and 1% PPF) showed the best shear resistance, deformability, and toughness, with minor rubber additions (up to 5%) enhancing beam deformability and fibre increasing post-crack resistance. The research concluded that the optimal mix for sustainable concrete applications of recycled materials includes up to 30% recycled coarse aggregate (RCA), 5% crumb rubber (CR), and up to 2% polypropylene fibre (PPF). This combination demonstrated the best balance of mechanical and structural performance, making it a…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/89889
note: MECHANICAL AND STRUCTURAL BEHAVIOUR OF RUBBERISED RECYCLED AGGREGATE CONCRETE by F M Zahid Hossain M.Sc., Bangladesh University of Engineering and Technology, 2005 B.Sc., Bangladesh University of Engineering and Technology, 1997 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in The College of Graduate Studies (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) December 2024 © F M Zahid Hossain, 2024 ii The following individuals certify that they have read and recommended to the College of Graduate Studies for acceptance the dissertation entitled: MECHANICAL AND STRUCTURAL BEHAVIOUR OF RUBBERISED RECYCLED AGGREGATE CONCRETE submitted by F M Zahid Hossain in partial fulfillment of the requirements for the degree of Doctor of Philosophy. Dr. M. Shahria Alam, School of Engineering Supervisor Dr. Ahmad Rteil, School of Engineering Supervisory Committee Member Dr. Kasun Hewage, School of Engineering Supervisory Committee Member Dr. Thomas Johnson, School of Engineering University Examiner Dr. Sreekanta Das, Faculty of Engineering, University of Windsor External Examiner iii Abstract This research examined the impact of using recycled coarse aggregate (RCA), crumb rubber (CR), and polypropylene fibre (PPF) as partial replacements for traditional concrete coarse and fine aggregates. Through a series of experiments, the study assessed the compressive strength, tensile strength, and flexural response of recycled aggregate concrete with CR and PPF in comparison to natural aggregate concrete. Further tests examined the bond strength of concrete with steel reinforcement, aiming to optimise resource use, and investigated the shear behaviour of concrete beams containing RCA, CR, and PPF. The findings contributed insights into the potential of these recycled materials to create more sustainable concrete solutions. The study found that increasing crumb rubber (CR) content resulted in reduced compressive, tensile, a…
has type: Thesis/Dissertation
date issued: 2025-02
is shown at: 10.14288/1.0447517
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
contributor: Alam, M. Shahria
type: Text
identifier URI: http://hdl.handle.net/2429/89889