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INVESTIGATION METHODS OF THE RESISTANCE OF UHPC TO CHEMICAL ATTACK AND ITS CLASSIFICATION IN THE EXPOSURE CLASSES OF THE EUROPEAN STANDARD



Author(s): Schmidt, H., Schmidt-Döhl, F., Franke, L. and Deckelmann, G.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 991-998
Total Pages: 8
Language: English


Abstract: The meaning of the behaviour of ordinary concrete and UHPC with respect to chemical attack is characterized and discussed in this work. Hereby of special interest is the discussion of the possibility of using UHPC without additional external protection, e.g. coatings, in settings of higher acid and salt concentrations than exposure class XA3 of the European standard EN 206. In this context the difference in durability of an ordinary reference mortar and various UHPC mixtures will be examined. The experimental results show a higher resistance of the considered UHPC mixtures against acid and salt solutions as an ordinary concrete or high performance concrete. To predict the damage depth for acid attacks a new method was developed with the possibility to determine effective equivalent pH values of the UHPC mixtures in comparison with an ordinary mortar, which attends completely the requirements of exposure class XA3. The final results of investigations show the recommendation of a new exposure class for chemical attacks (XA4) in attendance of the European standard EN 206. Furthermore the ultra high performance concrete could be used in the exposure class XA3 without any additional protection system.


Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00