CEE Oct-Dec 2002

EEC in 1969 was tra nsfcrerred to Europ c:1n commun it y fo r standard isat ion (CEN in 1973 ). Tcclmical comm ittee - TC 51 vvas entrusted by CLN lor preparing a ceml.! nt s tanda rd for 'vVe ste rn L::uropet~n countr ies compri sing CEC and EFT!\ members. 5). Types of European .\tondards CEN I TC 51 in mid seventies had identified nearly 20 different types of cement and in 2000, EN 197 -1 iclen tiri cd 27 types ot· cemen ts. Different types o f European Standards were in existence prior to year 2000, namely; I) Vol untary E.uropcan Standa rd (EN V) has s tatus similar to £3S I ( [3 riti sh Stnnclard In s titute) 'draft for deve lopment" and exists along side national standards. F.NVs exist for a maximum three yea rs be!'ore e it he r being upgr:Jded to a full European s tandard or vv ithdrawn or C.\! ended J'or fu rther I \VO years. 2) European Standard (EN) - When pub Iished. al l con1l icting national standnrds sta nd withdrawn within 6 months. ! ~ very CCN member publi shes European standard w: th a nat ional lorcword but cannot change the content of the standard- for e.g £3S - EN 196- I is the same as DIN– I:::N 196 - 1 and every 5 years European standard s a rc reviewed. 3) llarmoni sed European standard (li EN) - it contains onl y c lauses that relate to the esscmia l requ irements. 6) (] uidl!liues j (Jr EN slumlord ./(m11ul at io11 Since 1985 European Commi ssion is l'o rm ulat ing procedures to harmonise directives for a variety o l' products to en:1ble difkrenL coui1tries to be compared un iform Iy. The const ru ction prod uct directive (C PD) is a national legi slation ofsatis(ying the !allowing requirements; I) Mechanical res ista nce and stability 2) Safety in case of fi re 3) Hygien e, hea lth and environment 4) Safety in use 5) Protection against noise 6) E111.:rgy and heat retention The ge neral requ irement s of CPD are translated into variable s pecil'ication for cons truction purpose. Fo r thi s, CEN ha s formulated and harmoni sed European standard ; I) De l'i nes the relevant characteristics or the product 2) Develops the relevant methods to measure these characteristics 3) Defines level or classes 4) In dicates the procedure for attestation or conl'ormity No single standard e.\ists as an International Standard. ASTM. BS. DIN are well known worldwide stan dard s. The EN standard is gaining ground to have a common stand ard lor Europe. Standards like ASTM and RS specify requirements or cement, physical and chemical for type and class or ceme nt as well as testin g methodology. but in EN sta ndards, th is is divided into three segments; I) EN 196 - Methods of testing cement consist or: 44 Part I - Determination ol' strength Part 2- Chem ical an(ll) si~ oi' cement P(lrt 3 - Determination or~eiting time and sound ness Part 4 Quantitative determinat ion of constituents Part 5 - Pozzo lan icity test !'or pozzolan ic cements Part 6 - Dete rmin (l tio n of fineness Part 7 - Method or taking and preparing samples of cement Pa rt 21 - Determi na tion of ch loride, carbon di oxide and alkali conten t of cement 2) EN 197 - I -Cement - Part I; composition . spcc if ic(lti ons and conformity cr iteria for common cements. 3) EN 197 - 2 - Con fo rmit) evalua tion for usc by manufac turers and certificat ion bodies involved in the certi tication of cements fo r [C cert ificate of con formity. 8) Acceptability ofENstandunl.v: According to the CEN/ CI:::N ELEC regulations. the J'ollow ing nati on<~ l standard organis(lti ons me bo und to imp lement e uro pe an standards: Austr ia, Be lgium. Czech Repu bli c, Denmark. !' inlan d. France, Germany, Greece, Iceland. Ire land. It a ly. Lu.\embourg, Ne therlands. Norway . Po rtugal. Spa in , Sweden , Switzerland and UK US ma rke t is governed by /\STM specifi cati ons. In Eastern Europe (countries other than the above) and some Asian count ries are gove rned local spec ilicat ions for man utac turing cement for the ir ,. _ • '