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Interfacial bond properties for ECC overlay systems
Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2007.
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Stellenbosch : University of Stellenbosch
2007
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| _version_ | 1867613890624356352 |
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| access_status_str | Open Access |
| author | Stander, Heinrich |
| author2 | Van Zijl, G. P. A. G. |
| author_browse | Stander, Heinrich Van Zijl, G. P. A. G. |
| author_facet | Van Zijl, G. P. A. G. Stander, Heinrich |
| author_sort | Stander, Heinrich |
| collection | Thesis |
| dc_rights_str_mv | University of Stellenbosch |
| description | Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2007. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/2912 |
| institution | Stellenbosch University (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:43:20.403Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2007 |
| publishDateRange | 2007 |
| publishDateSort | 2007 |
| publisher | Stellenbosch : University of Stellenbosch |
| publisherStr | Stellenbosch : University of Stellenbosch |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/2912 Interfacial bond properties for ECC overlay systems Stander, Heinrich Van Zijl, G. P. A. G. University of Stellenbosch. Faculty of Engineering. Dept. of Civil Engineering. Theses -- Civil engineering Dissertations -- Civil engineering Cement composites Fiber-reinforced concrete Civil engineering Thesis (MScEng (Civil Engineering))--University of Stellenbosch, 2007. Bonded overlays are increasingly used in concrete and reinforced concrete repair and rehabilitation applications, despite the high probability of interfacial debonding. Reasons for such failures include inefficient substrate surface preparations, inappropriate overlay materials, poor curing conditions and time dependent influences. The introduction of engineered cement-based composite (ECC) as an overlay or repair material, does not only address durability aspects but also structural performance. The associated ductility of the material induces a high performance aspect where applied. It is crucial to execute reliable design methods, especially at interfacial level, in order to harness the ductility at hand. The fact of the matter is that through identifying the required performance, one can engineer an optimal bond through implementation of reliable substrate surface preparation techniques (SSPT’s). ECC is a material which exhibits ductile mechanical behaviour. The material matrix is reinforced with synthetic fibres, in the case of this study, poly vinyl alcohol (PVA) fibres were used. The introduction of fibres induces strain-hardening behaviour when in tension. Strain-hardening occurs from the first crack onwards and is accompanied by ductile behaviour, due to a multiple cracking phenomenon. Multiple cracking continues until the increased tensile load incurs localising of an existing crack. The literature study investigates bond properties and bond model parameter test methods. A review of composite design, mainly concrete to concrete, in local and international codes discloses design specifications towards calculating interfacial shear bonds. The interfacial transition zone (ITZ) between the aggregate and cement matrix of concrete is used to define the interfacial bond characteristics and processes. The next step is to investigate a variety of interfacial shear and tensile test methods, in order to implement the most suitable tests. 2007-11-23T07:26:35Z 2010-06-01T09:01:25Z 2007-11-23T07:26:35Z 2010-06-01T09:01:25Z 2007-03 Thesis http://hdl.handle.net/10019.1/2912 en University of Stellenbosch 6171981 bytes application/pdf application/pdf Stellenbosch : University of Stellenbosch |
| spellingShingle | Theses -- Civil engineering Dissertations -- Civil engineering Cement composites Fiber-reinforced concrete Civil engineering Stander, Heinrich Interfacial bond properties for ECC overlay systems |
| title | Interfacial bond properties for ECC overlay systems |
| title_full | Interfacial bond properties for ECC overlay systems |
| title_fullStr | Interfacial bond properties for ECC overlay systems |
| title_full_unstemmed | Interfacial bond properties for ECC overlay systems |
| title_short | Interfacial bond properties for ECC overlay systems |
| title_sort | interfacial bond properties for ecc overlay systems |
| topic | Theses -- Civil engineering Dissertations -- Civil engineering Cement composites Fiber-reinforced concrete Civil engineering |
| url | http://hdl.handle.net/10019.1/2912 |
| work_keys_str_mv | AT standerheinrich interfacialbondpropertiesforeccoverlaysystems |