This European Standard specifies a method for determining the effect of aggregates on the drying shrinkage of concrete. This standard is based on the testing of concretes of fixed mix portions and aggregates of 20 mm maximum size. NOTE 1: Guidance on the use of larger size is given in annex A. Precision data is not available for variations in size and for variations in the water content of the test concrete. NOTE 2: In those cases where the drying shringkage of a source of coarse aggregate only or a source of fine aggregate (sand) only are required, the other component to be used should be, respectively, a fine or coarse aggregate of known low shrinkage.