Non-steady State Chloride Migration and Binding in Cracked Self-compacting Concrete

来源 :Journal of Wuhan University of Technology(Materials Science | 被引量 : 0次 | 上传用户:c126202
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We adopted a notch method to study the influence of crack width(macro level) on chloride transport and binding of cracked concrete under a non-steady state migration test.The results show that migration coefficient of cracked concrete increases with increasing crack width up to a critical value(0.43 mm),for the whole concrete or the area close to crack;the increase of migration coefficient could be independent from crack parameter when a critical crack width is reached.For chloride binding,Langmuir isotherms of cracked concrete samples exhibit the similar decreasing trend as crack width increases from 0.27 to 1.96 mm.The increased current value could be responsible for the trend based on the hypothesis of electric force. We adopted a notch method to study the influence of crack width (macro level) on chloride transport and binding of cracked concrete under a non-steady state migration test. Results show that migration coefficient of cracked concrete increases with increasing crack width up to a critical value (0.43 mm), for the whole concrete or the area close to crack; the increase of migration coefficient could be independent from crack parameter when a critical crack width is reached. Forchlorum isotherms of cracked concrete samples exhibit similar decreasing trend as crack width increases from 0.27 to 1.96 mm. The increased current value could be responsible for the trend based on the hypothesis of electric force.
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