Developing and Evaluating Rapid Test Methods for Measuring the Sulphate Penetration Resistance of Concrete in Relation to Chloride Penetration Resistance
External sulphate attack on concrete can lead to cracking, expansion and sometimes loss of cohesiveness of hardened cement paste. Therefore, aside from using sulphate resistant cementitious binders, it is important to design concrete which can resist sulphate penetration. In this research, both ASTM...
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ndltd-TORONTO-oai-tspace.library.utoronto.ca-1807-312712013-11-01T04:11:38ZDeveloping and Evaluating Rapid Test Methods for Measuring the Sulphate Penetration Resistance of Concrete in Relation to Chloride Penetration ResistanceKarkar, EsterConcreteSulphate penetration resistanceChloride penetration resistanceRapid test methodsSulphate penetration depth0543External sulphate attack on concrete can lead to cracking, expansion and sometimes loss of cohesiveness of hardened cement paste. Therefore, aside from using sulphate resistant cementitious binders, it is important to design concrete which can resist sulphate penetration. In this research, both ASTM C1202 and NT Build 492 electrical migration tests were modified such that sulphate rather than chloride penetration resistances were measured. Modifications included exposing concrete specimens to Na2SO4 rather than NaCl solutions and measuring the depth of sulphate penetration visually using BaCl2+KMnO4 rather than AgNO3 solution. Nine concrete mixtures of varying w/cm, slag replacement and cement types were tested in both original standard tests and modified tests to evaluate the influence of these material variables on test results and compare chloride to sulphate results. It was found that while migration coefficients and total charge passing were lower for sulphate, the influence of material variables were relatively similar.Hooton, Robert Douglas2011-112011-12-12T15:13:17ZNO_RESTRICTION2011-12-12T15:13:17Z2011-12-12Thesishttp://hdl.handle.net/1807/31271en_ca |
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en_ca |
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Concrete Sulphate penetration resistance Chloride penetration resistance Rapid test methods Sulphate penetration depth 0543 |
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Concrete Sulphate penetration resistance Chloride penetration resistance Rapid test methods Sulphate penetration depth 0543 Karkar, Ester Developing and Evaluating Rapid Test Methods for Measuring the Sulphate Penetration Resistance of Concrete in Relation to Chloride Penetration Resistance |
description |
External sulphate attack on concrete can lead to cracking, expansion and sometimes loss of cohesiveness of hardened cement paste. Therefore, aside from using sulphate resistant cementitious binders, it is important to design concrete which can resist sulphate penetration. In this research, both ASTM C1202 and NT Build 492 electrical migration tests were modified such that sulphate rather than chloride penetration resistances were measured. Modifications included exposing concrete specimens to Na2SO4 rather than NaCl solutions and measuring the depth of sulphate penetration visually using BaCl2+KMnO4 rather than AgNO3 solution. Nine concrete mixtures of varying w/cm, slag replacement and cement types were tested in both original standard tests and modified tests to evaluate the influence of these material variables on test results and compare chloride to sulphate results. It was found that while migration coefficients and total charge passing were lower for sulphate, the influence of material variables were relatively similar. |
author2 |
Hooton, Robert Douglas |
author_facet |
Hooton, Robert Douglas Karkar, Ester |
author |
Karkar, Ester |
author_sort |
Karkar, Ester |
title |
Developing and Evaluating Rapid Test Methods for Measuring the Sulphate Penetration Resistance of Concrete in Relation to Chloride Penetration Resistance |
title_short |
Developing and Evaluating Rapid Test Methods for Measuring the Sulphate Penetration Resistance of Concrete in Relation to Chloride Penetration Resistance |
title_full |
Developing and Evaluating Rapid Test Methods for Measuring the Sulphate Penetration Resistance of Concrete in Relation to Chloride Penetration Resistance |
title_fullStr |
Developing and Evaluating Rapid Test Methods for Measuring the Sulphate Penetration Resistance of Concrete in Relation to Chloride Penetration Resistance |
title_full_unstemmed |
Developing and Evaluating Rapid Test Methods for Measuring the Sulphate Penetration Resistance of Concrete in Relation to Chloride Penetration Resistance |
title_sort |
developing and evaluating rapid test methods for measuring the sulphate penetration resistance of concrete in relation to chloride penetration resistance |
publishDate |
2011 |
url |
http://hdl.handle.net/1807/31271 |
work_keys_str_mv |
AT karkarester developingandevaluatingrapidtestmethodsformeasuringthesulphatepenetrationresistanceofconcreteinrelationtochloridepenetrationresistance |
_version_ |
1716612010584571904 |