CEN/TC 303/WG 1 - General

This European Standard specifies requirements for caustic magnesia and magnesium chloride, which will be used for magnesite screed material and magnesite screeds as specified in EN 13813.

It defines for fresh screed material the performance related to working time, consistency, pH value and for hardened screed material, compressive strength, flexural strength, wear resistance, surface hardness, resistance to uindentation, resistance to rolling wheel, shrinkage and swelling, modulus of elasticity and bond strength. It provides for the evaluation of conformity of the product to this draft European standard. The marking requirements for products covered by this draft European standard are included. This standard covers screed materials as defined in prEN 13318.

This European Standard defines terms, which are used in the production and application of screed material and floor screeds. The terms are valid for all standards prepared by TC 303.

This document specifies requirements for the following types of screed material as defined in EN 13318:
-   cementitious;
-   calcium sulfate;
-   magnesite;
-   mastic asphalt;
-   synthetic resin.
All types of screed material can be used for internal applications. However, cementitious screed materials can also be used for internal and external applications.
This document specifies the properties for fresh and hardened screed materials.
The floor screed materials could be installed as monolayer or multilayer products.
This document specifies designation of the screed materials as well as designation and classification of their characteristics. Furthermore, it also specifies the assessment and verification of constancy of performance, marking and labelling of the screed materials.
This document does not provide criteria or recommendations for the design and installation of screed materials.