This European Standard describes the test methods for binders for floor screeds based on calcium sulphate specified in prEN 13454-1. This European Standard describes the test methods for factory made mixtures for floor screeds based on calcium sulphate specified in EN 13813. This European Standard describes reference test methods. If other than these methods and conditions are used, it is necessary to show that they give results equivalent to those given by the reference methods. In the event of a dispute, only the reference test method is used.