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The issue of a European Community directive aimed at removing trade barriers to a variety of products, among them cement, led to the setting up of CEN/TC 51 as well as the preparation of a series of standards (EN 196) concerning test methods. These were adopted by CEN and later by ISO and are compared to ASTM standards. The release in 1988 of a further European directive dealing specifically with construction products required a new approach from CEN/TC 51's work towards cement definition, composition, specifications, and conformity criteria. The contents of the prestandard ENV 197-1 for common cements is described. At the same time, a tentative comparison is made of this prestandard and ASTM standards. Information is also given about future work planned with regard to common cements (possible additional performance criteria) and special cements.
Chairman of Technical Committee (TC) 51, Cement and Building Limes of CEN (European Committee for Standardization),
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