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This project aimed to develop a leaching test capable of determining the long-term leaching behaviour of concrete. The protocol developed should enable the assessment of the impact of concrete to the environment. The basic mechanism in which concrete may influence the environment is leaching. From the results in this project, it may be concluded that a certified reference material (CRM) is not feasible, because of two problems. The first problem is that from the point of view of preparing a CRM, the concentration levels obtained in leaches from concrete are too low to serve as a reference material. Secondly, the stability of concrete with respect to leaching is a problem. During the first year, the hydration of the concrete changes in time, and as a result, so does the mobility of the ions in the concrete matrix. Due to this hardening process, the emissions tend to decrease in time. A possible solution could be to use concrete of a few year age, that may prove to be sufficiently stable towards leaching.

Additional information

Authors: DE GROOT G J, Energieonderzoek Centrum Nederland (NL);HOHBERG I, Institut für Bauforschung der RWTH, Aachen (DE);LAMERS F J M, NV KEMA (NL);VAN DER VEEN A M H, Nmi-Van Swindon Laboratorium BV (NL);WASSING W, Forschungsinstitut der Zementindustrie (DE);QUEVAUVILLER P, CEC Bruxelles (BE)
Bibliographic Reference: EUR 17869 EN (1997) 173pp., FS, free of charge
Availability: Available from the DG XII Documentation Centre, European Commission, 200 rue de la Loi, B-1049 Bruxelles (BE), Fax: +32-2-2969823
ISBN: ISBN 92-828-1327-4
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