Aggressive water attack on carbonated cement materials

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dc.contributor.advisorLoewenthal, Richard Ericen_ZA
dc.contributor.authorMackintosh, Grant Stewarten_ZA
dc.date.accessioned2016-03-28T14:24:49Z
dc.date.available2016-03-28T14:24:49Z
dc.date.issued1991en_ZA
dc.description.abstractAggressive attack on samples was monitored by measuring changes in chemical characteristics of the water exposed to cement concrete samples, inter alia pH, calcium and alkalinity. Over the period of the investigation (100 days) the following observations were found to apply to both brown and white water: (i) Generally uncarbonated OPC experiences significantly higher calcium mineral dissolution rates than both carbonated OPC and 30% fly ash OPC cement concretes. (ii) Once steady dissolution rates were attained, measurements indicated that 30% fly ash OPC and carbonated OPC concrete undergo closely the same calcium mineral dissolution rates. Before these findings are implemented, the following practical considerations need to be addressed: (i) An economic assessment of the benefits of using carbonated OPC, fly ash OPC and carbonated fly ash OPC as a means of resisting aggressive attack. (ii) The investigation should be upgraded from laboratory scale to pilot scale. (iii) The influence of accelerated carbonation on corrosion of steel reinforcing.en_ZA
dc.identifier.apacitationMackintosh, G. S. (1991). <i>Aggressive water attack on carbonated cement materials</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Water Research Group. Retrieved from http://hdl.handle.net/11427/18239en_ZA
dc.identifier.chicagocitationMackintosh, Grant Stewart. <i>"Aggressive water attack on carbonated cement materials."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Water Research Group, 1991. http://hdl.handle.net/11427/18239en_ZA
dc.identifier.citationMackintosh, G. 1991. Aggressive water attack on carbonated cement materials. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Mackintosh, Grant Stewart AB - Aggressive attack on samples was monitored by measuring changes in chemical characteristics of the water exposed to cement concrete samples, inter alia pH, calcium and alkalinity. Over the period of the investigation (100 days) the following observations were found to apply to both brown and white water: (i) Generally uncarbonated OPC experiences significantly higher calcium mineral dissolution rates than both carbonated OPC and 30% fly ash OPC cement concretes. (ii) Once steady dissolution rates were attained, measurements indicated that 30% fly ash OPC and carbonated OPC concrete undergo closely the same calcium mineral dissolution rates. Before these findings are implemented, the following practical considerations need to be addressed: (i) An economic assessment of the benefits of using carbonated OPC, fly ash OPC and carbonated fly ash OPC as a means of resisting aggressive attack. (ii) The investigation should be upgraded from laboratory scale to pilot scale. (iii) The influence of accelerated carbonation on corrosion of steel reinforcing. DA - 1991 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1991 T1 - Aggressive water attack on carbonated cement materials TI - Aggressive water attack on carbonated cement materials UR - http://hdl.handle.net/11427/18239 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18239
dc.identifier.vancouvercitationMackintosh GS. Aggressive water attack on carbonated cement materials. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Water Research Group, 1991 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18239en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentWater Research Groupen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherCivil Engineeringen_ZA
dc.subject.otherhydrodynamic forcesen_ZA
dc.titleAggressive water attack on carbonated cement materialsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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