Effect of Binder Composition on the Structure of Cement Paste and on Physical Properties and Freeze-Thaw Resistance of Concrete

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• 作者：Jerzy Wawrzeńczyk ; Tomasz Juszczak ; Agnieszka Molendowska ; ^{agam@tu.kielce.pl" class="auth_mail" title="E-mail the corresponding author}
• 关键词：structure ; porosity ; paste ; concrete ; permeability ; freeze-thaw resistance
• 刊名：Procedia Engineering
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：161
• 期：Complete
• 页码：73-78
• 全文大小：213 K

文摘

The primary objective of this study was to determine how differences in the composition of the binder made with Portland cement, slag and/or fly ash affect the modification of the cement paste structure and the properties of concrete with respect to its freeze/thaw resistance. The test results show that the use of mineral additions (fly ash or a mixture of fly ash and slag) does not guarantee the impermeability and the frost resistant structure of concrete. The concrete behaves as expected up to the slag level of 20% by mass of the cement. The results from the tests conducted on non-air entrained concretes with W/B ratio of 0.45 (limiting value for concrete exposure class XF4) show that the concrete mix in any case should be air entrained when mineral additions are to be used.