ABSTRACT

The European Standards Organisation Technical Committee responsible for cement standards, TC 51, has decided that in view of the large number of cements involved the cement standard, EN 197, will be divided into several parts. The first part, EN 197-1 (currently approved as a pre-standard [1]), has been restricted to those cements whose hardening mainly depends on the hydration of calcium silicates and which are provided for common uses. Other parts of the EN 197 series will be drafted for cements having different mechanisms of hardening or additional special properties. As the number EN 197-2 has now been assigned to the evaluation of conformity presumably special cements will be numbered from EN 197-3 onwards. Some special cements may be given numbers in other series e.g. EN 413-Masonry cements. As the European Standards develop the UK will consider these, amending any relevant British Standards to align them with the new ENs or introducing new British Standards to incorporate any not previously standardized in the UK.