scope:

This Prestandard specifies properties of the constituents of common cements and the proportions in which they are to be combined to produce a range of types and classes of cement. It then specifies the mechanical, physical and chemical requirements for these types and classes and states the rules for assessing their conformity to these requirements. It is recognized that different cements have different properties and performance. Where performance tests are available (i.e. setting time, strength and soundness), they have already been taken into account in this Prestandard. In addition, work is being carried out by CEN/TC 51 to identify any additional tests which are needed to specify further performance of cement. In the meantime, and during the life of this prestandard, it is necessary that the choice of cement, especially the type and/or strength class in relation to the exposure class and type of construction in which it is incorporated, should follow the national standard and other regulations valid in the place where the cement is used.