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Chloride induced corrosion of integral and non-integral surface treated lightweight foamed concrete
Thesis (MEng)--Stellenbosch University, 2018.
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| Other Authors: | |
| Format: | Thesis |
| Language: | en_ZA |
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Stellenbosch : Stellenbosch University
2018
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| _version_ | 1867613741586055168 |
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| access_status_str | Open Access |
| author | Zvinokona, Admire Ruvimbo |
| author2 | Van Rooyen, Algurnon Steve |
| author_browse | Van Rooyen, Algurnon Steve Zvinokona, Admire Ruvimbo |
| author_facet | Van Rooyen, Algurnon Steve Zvinokona, Admire Ruvimbo |
| author_sort | Zvinokona, Admire Ruvimbo |
| collection | Thesis |
| dc_rights_str_mv | Stellenbosch University |
| description | Thesis (MEng)--Stellenbosch University, 2018. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/103360 |
| institution | Stellenbosch University (South Africa) |
| language | en_ZA |
| last_indexed | 2026-06-10T12:40:58.109Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2018 |
| publishDateRange | 2018 |
| publishDateSort | 2018 |
| publisher | Stellenbosch : Stellenbosch University |
| publisherStr | Stellenbosch : Stellenbosch University |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/103360 Chloride induced corrosion of integral and non-integral surface treated lightweight foamed concrete Zvinokona, Admire Ruvimbo Van Rooyen, Algurnon Steve Stellenbosch University. Faculty of Engineering. Dept. of Civil Engineering. UCTD Chlorides -- Corrosion Lightweight concrete --Service life Concrete -- Expansion and contraction Thesis (MEng)--Stellenbosch University, 2018. ENGLISH ABSTRACT: Advancement in new technologies and methods of producing foaming agents have resulted in enhanced possibility of a structurally performing lightweight concrete. Lightweight foamed concrete (LWFC) is a cement based composite material that has shown remarkable potential as a replacement to Normal Weight Concrete (NWC) for structural applications. LWFC stands as a low self-weight building material relatively compared to its counterpart, NWC. Other than reduced self-weight, it also possesses desirable properties such as good thermal insulation, excellent fire resistance, and high workability and self-levelling. Technical and engineering unfamiliarity of LWFC has contributed to inhibiting the material’s wider use and advancement for structural application. In addition to the above, limited literature on the material’s durability properties and performance under exposure to aggressive elements such as carbon dioxide and chlorides contribute as a drawback. This thesis reports on a durability study on LWFC undertaken at Stellenbosch University (SU). LWFC beam specimens were exposed to cyclic wetting and drying periods using NaCl solution under controlled humidity and temperature conditions. The performance of two types of surface treatment agents in LWFC against preventing accelerated penetration of chloride ions and consequently chloride induced corrosion was the main focus. Chloride penetration was investigated by silver nitrate testing, and reinforcement corrosion was monitored via a non-destructive linear polarisation method using commercially available GECOR 10 corrosion rate measuring equipment. The results indicated that inclusion of fly ash in reinforced LWFC reduces risk of dry shrinkage cracking, limiting localised corrosion on cracked locations. The surface applied silane-based water repellent treatment agent was effective in preventing moisture penetration, leading to the low reinforcement corrosion rates and chloride ion penetration depths. AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar 2018-02-19T08:20:05Z 2018-04-09T06:54:02Z 2018-02-19T08:20:05Z 2018-04-09T06:54:02Z 2018-03 Thesis http://hdl.handle.net/10019.1/103360 en_ZA Stellenbosch University 94 pages : illustrations application/pdf Stellenbosch : Stellenbosch University |
| spellingShingle | UCTD Chlorides -- Corrosion Lightweight concrete --Service life Concrete -- Expansion and contraction Zvinokona, Admire Ruvimbo Chloride induced corrosion of integral and non-integral surface treated lightweight foamed concrete |
| title | Chloride induced corrosion of integral and non-integral surface treated lightweight foamed concrete |
| title_full | Chloride induced corrosion of integral and non-integral surface treated lightweight foamed concrete |
| title_fullStr | Chloride induced corrosion of integral and non-integral surface treated lightweight foamed concrete |
| title_full_unstemmed | Chloride induced corrosion of integral and non-integral surface treated lightweight foamed concrete |
| title_short | Chloride induced corrosion of integral and non-integral surface treated lightweight foamed concrete |
| title_sort | chloride induced corrosion of integral and non integral surface treated lightweight foamed concrete |
| topic | UCTD Chlorides -- Corrosion Lightweight concrete --Service life Concrete -- Expansion and contraction |
| url | http://hdl.handle.net/10019.1/103360 |
| work_keys_str_mv | AT zvinokonaadmireruvimbo chlorideinducedcorrosionofintegralandnonintegralsurfacetreatedlightweightfoamedconcrete |