Concrete received his Eurostandard
European Committee for Standardization CEN was established to develop European standards. His stock are various technical committees, including on concrete and reinforced concrete: TC 51 - Cement, TC 104 - Concrete and its component materials, TS 154 - "Fillers for Concrete", TC 229 - prefabricated concrete products and design, TS 250 - Calculation and design. Now on the agenda - the creation of a unified system of European standards, mandatory for use in all countries - EU member states. Some are already achieving. For example, the standard E 206-1 "Concrete. General specifications, production and quality control ", approved May 12, 2000, adopted in Finland, France, Germany, Italy, UK. The process of adoption of this standard, the latest countries to be completed by the end of 2004. Eurostandard EN 206 "concrete" contains requirements for the concrete, the made at construction sites, factories and ready-mixed concrete plants and precast concrete and intended for the manufacture of monolithic and precast concrete and concrete structures, including prestressed reinforcement. Standard EN 206-1 should be used in conjunction with the standards of the source materials and methods of testing. Eurostandard contains requirements for the following sections: components of concrete mixture and hardened concrete, restrictions on the composition, specification of concrete, concrete delivery, manufacturing control and others. This standard is not suitable for concrete with additives and artificial pinotvornymy vozduhovovlecheniyem, velykoporystomu (without fine aggregate), such that a density of less than 800 kg/m3 resistant. Terms of use of the associated products manufacturing, retsyklirovannyh materials and so on are regulated by national standards and Eurostandard not included. In European standards the term "heavy concrete" refers to concrete with a density of 2600 kg/m3, the normal density concrete should be from 2100 to 2600 kg/m3, lay concrete cue - 800-2100 kg/m3. In high-strength concrete are concrete class above S60. Maximum class of concrete specified in the standard, heavy - S115, to the lungs - S88. The standard is widely used two terms: "given the quality of concrete (concrete, which define the necessary characteristics of the consumer, with the concrete manufacturer is responsible for ensuring these characteristics) and the set of concrete - concrete, the composition of which is appointed by the consumer, while the manufacturer is responsibility adherence to this structure, but is not responsible for other software, including the performance of such concrete. In European standards there is no indication of any legal responsibility, full responsibility - Tech.
Standard EN 206-1 provides guidance for the designer, manufacturer and a contractor (customer) of concrete. Designer is responsible for the proper designation requirements for concrete manufacturer - to meet these requirements at the stage of production but also control contractor - for the proper performance of concrete work on the construction site. Great attention is paid to the requirements of European standards for quality concrete. Detailed rules prescribed sampling in preparation for concrete proof of strength. There are instructions for control of all materials, operations and equipment used in the preparation of concrete. Caused and the measures to be taken in case of violation of these or other requirements. At the end of European standards and certification procedures described in the audit of the production of concrete. The standard commands that the requirements of concrete shall be appointed for the term reliable operation of structures or structures in the flow of not less than 50 years, thus stipulates that the building is maintained in the same environment for which were selected properties of concrete. Eurostandard provides guidance on accounting for concrete actions to six different operating environments, and only one environment is not considered invasive. Osta one event five have three or four pidhradatsiyi as increased aggressiveness. As recommended under the strength of concrete for these environments are in the range of S25 (a danger that, carbonization) and S45 (sea water, chemical attack). In action under freezing-thawing minimum rating for the strength of compression recommended for C30 (in the standard class concrete marked by W, from the word concrete - concrete). The standard is 10 offers recommendations for primary-heeled warehouses, to ensure the durability of concrete at the stage of preparation depending on the environment of operation and certification of industrial control systems, requirements for accuracy of dosing equipment and others. In Russian NIYIZHB executed translation standard EN 206-1 on the Russian language. By Vyacheslav HYLOVICH