Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/224146
Title: EVALUATION OF THE PERFORMANCE OF THE CONCRETE SPALLING REPAIR WORKS BY DIFFERENT MATERIALS AND SURFACE PREPARATION METHODS
Authors: LI SAI TING WAYNE
Keywords: Building
Issue Date: 3-Jun-2009
Citation: LI SAI TING WAYNE (2009-06-03T09:23:41Z). EVALUATION OF THE PERFORMANCE OF THE CONCRETE SPALLING REPAIR WORKS BY DIFFERENT MATERIALS AND SURFACE PREPARATION METHODS. ScholarBank@NUS Repository.
Abstract: Evaluation of the performance of the concrete spalling repair works by different materials and surface preparation methods In this dissertation findings of the laboratory investigation of the recommended repair material and surface preparation are presented. The main objective of this research is to evaluate the performance of the repair works using five different materials and two distinctive surface preparation methods. This is in response to the rising needs for quality concrete spalling repair work as there are cases of repair failure. Moreover, spalling is common among aging buildings in Singapore and stakeholders have increased awareness on maintenance issues. The five selected materials are ordinary cement mortar, polymer modified mortar, epoxy mortar and concrete with two different water cementratios. It is hypothesized that epoxy mortar yields the best result as evident in literature reviews. Materials are applied and cured at least for 28 days in the beam depression before third point loading test is carried out. The results how concrete is indeed the most recommended material with strength 21% higher than the control. Likewise, surface preparation method X and Y are selected. Method X produces beam depression with neat and regular edges and under cutting at the reinforcement; Method Y produces feather edged depression with no under cutting of reinforcement. Hypothesis has made on the most ideal preparation method to be method X and it is supported by the findings. Based on the beam behaviour observed, strengthening by repair materials is crucial in preventing debonding failure and excessive strain on steel bars. Limitations identified are mainly due to the lacking of suitable equipments for deflection measurement and an optimal curing environment.
URI: https://scholarbank.nus.edu.sg/handle/10635/224146
Appears in Collections:Bachelor's Theses

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Li Sai Ting Wayne 2008-2009.pdf2.6 MBAdobe PDF

RESTRICTED

NoneLog In

Page view(s)

11
checked on Sep 29, 2022

Download(s)

5
checked on Sep 29, 2022

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.