【正文】 ? where the chloride content is in excess of 0,10 %, the maximum chloride content (as a value that will not be exceeded). NOTE For CE marking and labelling, ZA applies. EN 151671:2020 (E) 9 Licensed Copy: London South Bank University, London South Bank University, Wed Jan 10 19:37:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 7 Sampling Spot samples, equally distributed over the manufacturing period, shall be taken at the point of release into packages or a system for bulkdelivery transportation or, alternatively, directly from bulkdelivery transportation systems or packages, using the equipment and principles described in EN 1967. For the purpose of carrying out all the analyses and tests needed to show conformity or non conformity to the requirements set out in 5, a representative laboratory sample of ground granulated blastfurnace slag of at least 1 kg is required. This sample shall be obtained by subdividing, such as quartering, a spot sample of at least 5 kg. 8 Evaluation of conformity General requirements The conformity of ground granulated blastfurnace slag to the requirements of this European Standard and to the stated values shall be demonstrated by: ? initial type testing。 ? the name or identification mark of the factory where the ground granulated blastfurnace slag was manufactured。 i) the method(s) of rapid cooling used to produce the granulated blastfurnace slag(s) used in the manufacture of the ground granulated blastfurnace slag (see note to ). The format and the basis on which the information on the properties is declared, shall be as agreed between the manufacturer and user. 6 Packaging and labelling Ground granulated blastfurnace slag may be delivered in suitable packages or by means of suitable bulkdelivery transportation systems. The following information shall be marked on the packages or in the case of bulk delivery, on the documents: ? the number of this European Standard, . EN 151671。 g) relative density determined in accordance with EN 1966。 e) total content of alkalis determined in accordance with EN 1962, or other method agreed between manufacturer and user, and expressed as equivalent sodium oxide。 c) initial setting time and 7 and 28day strength of the test cement。 ? the alkali (Na2O equivalent) content shall be between 0,5 % and 1,2 %. Initial setting time When determined in accordance with EN 1963, the initial setting time of a bination (by mass) of 50 % of ground granulated blastfurnace slag with 50 % of test cement, shall not be more than twice as long as that of the test cement on its own. Activity index The activity index shall be expressed as the ratio (in percent) of the pressive strength of the bination (by mass) of 50 % of ground granulated blastfurnace slag with 50 % of test cement, to the pressive strength of the test cement on its own. The pressive strengths shall be determined in accordance with EN 1961 and the water:bination ratio and the water:cement ratio shall both be 0,50. The activity index at 7 days and at 28 days shall be not less than 45 % and 70 % respectively. NOTE The activity index gives no direct information on the strength contribution of ground granulated blastfurnace slag in concrete, nor is the use of the ground granulated blastfurnace slag limited to the mixing ratio used in the activity index test. Other requirements Durability requirements The position and the performance of the ground granulated blastfurnace slag shall be such that durable concrete may be produced when using it. GGBS conforming to this European Standard is deemed to satisfy the durability requirements, provided that other requirements for durability of concrete in relevant standards and/or regulations valid in the place of use are fulfilled. Release of dangerous substances and emission of radioactivity NOTE In the absence of specific requirement with respect to substances, dangerous to health, hygiene and environment in this European Standard, Annex , Note 1 applies. EN 151671:2020 (E) 8 Licensed Copy: London South Bank University, London South Bank University, Wed Jan 10 19:37:14 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Information to be supplied upon request Information on the properties listed below shall be declared to the user upon request: a) 7 and 28day activity index of a 50 % bination of the ground granulated blastfurnace slag with 50 % of test cement, determined in accordance with 。 ? the Blaine fineness shall be at least 300 m2/kg。 5 ) 176。 R NOR M UNG Management Centre: rue de Stassart, 36 B1050 Brussels 169。EN DE NOR M A L I S A T I O N EUR O P 196。tskriterien This European Standard was approved by CEN on 26 June 2020. CEN members are bound to ply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up todate lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France