Polymer impregnation of concrete as a means of improving corrosion resistance

 

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dc.contributor.advisor Tait, Robert B en_ZA
dc.contributor.author Potgieter, Hentie en_ZA
dc.date.accessioned 2015-04-22T12:50:55Z
dc.date.available 2015-04-22T12:50:55Z
dc.date.issued 1980 en_ZA
dc.identifier.citation Potgieter, H. 1980. Polymer impregnation of concrete as a means of improving corrosion resistance. University of Cape Town. en_ZA
dc.identifier.uri http://hdl.handle.net/11427/12690
dc.description Bibliography: p. [i-iii]. en_ZA
dc.description.abstract The service life of concrete in particularly extreme bacteriological environments has long been a problem that has been facing engineers and concrete materials experts. This is particularly relevant for the case of concrete sewer pipes, the useful life of which is critically limited by corrosion due primarily, and ultimately, to sulphide attack. Sulphides are formed from the sewage sulphates, by bacteria in the slime layers on the walls of the pipe. These diffuse, firstly into the liquid, and then into the sewer atmosphere as hydrogen sulphide, which is then in turn oxidised to sulphuric acid. Hydrogen sulphide gas is well known for its characteristic "rotten eggs" odour, but more important although less known, for its extreme toxicity. The maximum safe concentration in air is only twice that of hydrogen cyanide. It also has the dangerous side effect that the ability to sense it by smell is quickly lost after first encountering the gas, and deaths have occurred in sewers that can be both directly and indirectly attributed to hydrogen sulphide poisoning. The corrosion discussed in this thesis refers primarily to that caused by this bacteriologically created sulphuric acid attack in the space above the liquid, as opposed to sub-liquid level corrosion due to aggressive chemicals, more commonly associated with industrial effluents. This is all discussed more fully in later sections. en_ZA
dc.language.iso eng en_ZA
dc.subject.other Metallurgy and Materials Science en_ZA
dc.title Polymer impregnation of concrete as a means of improving corrosion resistance en_ZA
dc.type Master Thesis
uct.type.publication Research en_ZA
uct.type.resource Thesis en_ZA
dc.publisher.institution University of Cape Town
dc.publisher.faculty Faculty of Engineering and the Built Environment
dc.publisher.department Centre for Materials Engineering en_ZA
dc.type.qualificationlevel Masters
dc.type.qualificationname MSc en_ZA
uct.type.filetype Text
uct.type.filetype Image
dc.identifier.apacitation Potgieter, H. (1980). <i>Polymer impregnation of concrete as a means of improving corrosion resistance</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering. Retrieved from http://hdl.handle.net/11427/12690 en_ZA
dc.identifier.chicagocitation Potgieter, Hentie. <i>"Polymer impregnation of concrete as a means of improving corrosion resistance."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1980. http://hdl.handle.net/11427/12690 en_ZA
dc.identifier.vancouvercitation Potgieter H. Polymer impregnation of concrete as a means of improving corrosion resistance. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 1980 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/12690 en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Potgieter, Hentie AB - The service life of concrete in particularly extreme bacteriological environments has long been a problem that has been facing engineers and concrete materials experts. This is particularly relevant for the case of concrete sewer pipes, the useful life of which is critically limited by corrosion due primarily, and ultimately, to sulphide attack. Sulphides are formed from the sewage sulphates, by bacteria in the slime layers on the walls of the pipe. These diffuse, firstly into the liquid, and then into the sewer atmosphere as hydrogen sulphide, which is then in turn oxidised to sulphuric acid. Hydrogen sulphide gas is well known for its characteristic "rotten eggs" odour, but more important although less known, for its extreme toxicity. The maximum safe concentration in air is only twice that of hydrogen cyanide. It also has the dangerous side effect that the ability to sense it by smell is quickly lost after first encountering the gas, and deaths have occurred in sewers that can be both directly and indirectly attributed to hydrogen sulphide poisoning. The corrosion discussed in this thesis refers primarily to that caused by this bacteriologically created sulphuric acid attack in the space above the liquid, as opposed to sub-liquid level corrosion due to aggressive chemicals, more commonly associated with industrial effluents. This is all discussed more fully in later sections. DA - 1980 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1980 T1 - Polymer impregnation of concrete as a means of improving corrosion resistance TI - Polymer impregnation of concrete as a means of improving corrosion resistance UR - http://hdl.handle.net/11427/12690 ER - en_ZA


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