Interfacial bond strength of fabric reinforced cementitious matrix : effect of substrate properties and fibre-mortar ratio
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Fraser, Tanya Leigh
issued: 2020-04-28T19:40:53Z
issued: 2020
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Fabric Reinforced Cementitious Matrix (FRCM) is a relatively new material used for strengthening applications of reinforced concrete structures. Several studies reported in the literature have indicated that the bond between FRCM layers and the concrete substrate is one of the main factors that affect the performance of the system. Few studies have attempted a combined approach of analyzing the surfaces between the three layers of this composite (fibres-matrix-concrete). An investigation of the bond behavior is studied in this thesis with an emphasis on the fibre-matrix and the concrete-matrix interfaces. The efficacy of surface preparation methods and the existing concrete strength were used to evaluate the bond at the concrete-matrix interface. The fibre-mortar width ratio was used to analyze the bond at the fibre-matrix interface. This experiment was completed in two phases: 72 concrete blocks (150x150x165mm) in double shear testing and 12 small concrete beams (150x150x500mm) in flexural testing. For double shear, the varying parameters included 1) surface preparation (untreated, grinding, sandblasting, shotblasting, and combination), 2) fibre-mortar width ratio (1:1 and 1:2) with fibre widths of 120mm and 60mm, and 3) concrete strength (30MPa and 50MPa). The double shear test results indicated that the bond strength increased with enhanced methods of surface preparation. Surface grooving reduced the debonding response, and combined surface preparation methods were effective at eliminating debonding failures. Also, the fibre-mortar ratio of 1:2 exhibited higher bond strength and reduced bond failure than the 1:1 ratio. The concrete strength had an insignificant effect on the bond strength and failure mode. For flexural specimens, the surface preparation method was examined. The surface preparation had a significant effect on the bond strength, and all failures occurred at the fibre-matrix interface. The bond strength was on average 44.5% higher for the flexural t…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/74217
note: INTERFACIAL BOND STRENGTH OF FABRIC REINFORCED CEMENTITIOUS MATRIX: EFFECT OF SUBSTRATE PROPERTIES AND FIBRE-MORTAR RATIO by Tanya Leigh Fraser B.A.Sc., University of British Columbia, Kelowna, 2018 A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE COLLEGE OF GRADUATE STUDIES (Civil Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) April 2020 © Tanya Leigh Fraser, 2020 ii The undersigned certify that they have read, and recommend to the College of Graduate Studies for acceptance, a thesis entitled: INTERFACIAL BOND STRENGTH AND FAILURE MODE ANALYSIS OF FABRIC REINFORCED CEMENTITIOUS MORTAR: EFFECT OF SUBSTRATE PROPERTIES AND FIBRE-MORTAR RATIO Submitted by: Tanya Fraser in partial fulfillment of the requirements of the degree of Master of Applied Science Dr. Ahmad Rteil, School of Engineering Supervisor, Professor (please print name and faculty/school above the line) Dr. Abbas Milani, School of Engineering Supervisory Committee Member, Professor (please print name and faculty/school in the line above) Dr. Shahria Alam, School of Engineering Supervisory Committee Member, Professor (please print name and faculty/school in the line above) Dr. Rudolf Seethaler, School of Engineering University Examiner, Professor (please print name and faculty/school in the line above) iii ABSTRACT Fabric Reinforced Cementitious Matrix (FRCM) is a relatively new material used for strengthening applications of reinforced concrete structures. Several studies reported in the literature have indicated that the bond between FRCM layers and the concrete substrate is one of the main factors that affect the performance of the system. Few studies have attempted a combined approach of analyzing the surfaces between the three layers of this composite (fibres-matrix-concrete). An investigation of the bond behavior is studied in this thesis with an emphasis on the fibre-matrix and the concrete-matrix interfaces. The efficacy of …
has type: Thesis/Dissertation
date issued: 2020-05
is shown at: 10.14288/1.0390012
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/2429/74217