Durability Index Performance of High Strength Concretes Made Based on Different Standard Portland Cements
A consortium of three durability index test methods consisting of oxygen permeability, sorptivity and chloride conductivity were used to evaluate the potential influence of four (4) common SANS 10197 cements on strength and durability of concrete. Twenty four (24) concrete mixtures of water-cement r...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2012/410909 |
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| author | Stephen O. Ekolu Sheena Murugan |
| author_facet | Stephen O. Ekolu Sheena Murugan |
| author_sort | Stephen O. Ekolu |
| collection | DOAJ |
| description | A consortium of three durability index test methods consisting of oxygen permeability, sorptivity and chloride conductivity were used to evaluate the potential influence of four (4) common SANS 10197 cements on strength and durability of concrete. Twenty four (24) concrete mixtures of water-cement ratios (w/c's) = 0.4, 0.5, 0.65 were cast using the cement types CEM I 42.5N, CEM II/A-M (V-L) 42.5N, CEM IV/B 32.5R and CEM II/A-V 52.5N. The concretes investigated fall in the range of normal strength, medium strength and high strength concretes. It was found that the marked differences in oxygen permeability and sorptivity results observed at normal and medium strengths tended to vanish at high concrete strengths. Also, the durability effects attributed to use of different cement types appear to diminish at high strengths. Cements of low strength and/or that contained no extenders (CEM 32.5R, CEM I 42.5N) showed greater sensitivity to sorptivity, relative to other cement types. Results also show that while concrete resistance to chlorides generally improves with increase in strength, adequately high chloride resistance may not be achieved based on high strength alone, and appropriate incorporation of extenders may be necessary. |
| format | Article |
| id | doaj-art-fa700f8aa88d4da396ded011c53d6986 |
| institution | OA Journals |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-fa700f8aa88d4da396ded011c53d69862025-08-20T02:22:37ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422012-01-01201210.1155/2012/410909410909Durability Index Performance of High Strength Concretes Made Based on Different Standard Portland CementsStephen O. Ekolu0Sheena Murugan1School of Civil and Environmental Engineering, University of the Witwatersrand, 1 Jan Smuts Ave, Private Bag 3, WITS 2050, Johannesburg, South AfricaReady-Mix, Lafarge Industries SA (pty) Ltd., 35 Westfield Road, Longmeadow Business Estate Ext. 11,1609, Private Bag X2, Gallo Manor 2052, Johannesburg, South AfricaA consortium of three durability index test methods consisting of oxygen permeability, sorptivity and chloride conductivity were used to evaluate the potential influence of four (4) common SANS 10197 cements on strength and durability of concrete. Twenty four (24) concrete mixtures of water-cement ratios (w/c's) = 0.4, 0.5, 0.65 were cast using the cement types CEM I 42.5N, CEM II/A-M (V-L) 42.5N, CEM IV/B 32.5R and CEM II/A-V 52.5N. The concretes investigated fall in the range of normal strength, medium strength and high strength concretes. It was found that the marked differences in oxygen permeability and sorptivity results observed at normal and medium strengths tended to vanish at high concrete strengths. Also, the durability effects attributed to use of different cement types appear to diminish at high strengths. Cements of low strength and/or that contained no extenders (CEM 32.5R, CEM I 42.5N) showed greater sensitivity to sorptivity, relative to other cement types. Results also show that while concrete resistance to chlorides generally improves with increase in strength, adequately high chloride resistance may not be achieved based on high strength alone, and appropriate incorporation of extenders may be necessary.http://dx.doi.org/10.1155/2012/410909 |
| spellingShingle | Stephen O. Ekolu Sheena Murugan Durability Index Performance of High Strength Concretes Made Based on Different Standard Portland Cements Advances in Materials Science and Engineering |
| title | Durability Index Performance of High Strength Concretes Made Based on Different Standard Portland Cements |
| title_full | Durability Index Performance of High Strength Concretes Made Based on Different Standard Portland Cements |
| title_fullStr | Durability Index Performance of High Strength Concretes Made Based on Different Standard Portland Cements |
| title_full_unstemmed | Durability Index Performance of High Strength Concretes Made Based on Different Standard Portland Cements |
| title_short | Durability Index Performance of High Strength Concretes Made Based on Different Standard Portland Cements |
| title_sort | durability index performance of high strength concretes made based on different standard portland cements |
| url | http://dx.doi.org/10.1155/2012/410909 |
| work_keys_str_mv | AT stephenoekolu durabilityindexperformanceofhighstrengthconcretesmadebasedondifferentstandardportlandcements AT sheenamurugan durabilityindexperformanceofhighstrengthconcretesmadebasedondifferentstandardportlandcements |