bsen934-4-2001admixturesforconcretemortarandgrout—admixturesforgroutforprestressingtendons—pa

bsen934-4-2001admixturesforconcretemortarandgrout—admixturesforgroutforprestressingtendons—pa内容摘要：

ing ............................................................................................................................ 1 3 Table 1 General requirements............................................................................................................................... 6 Table 2 Requirements for test mix ........................................................................................................................ Table 3 Minimum frequency of test for factory production control for admixtures for grout for prestressing tendons............................................................................................................................ 7 7 Table Scope and relevant clauses of this standard ................................................................................... 1 0 Table System of attestation of conformity .................................................................................................. 1 1 Table Assignation of evaluation of conformity tasks .................................................................................. 1 2 EN 9344:2020 (E) 3 Foreword This European Standard has been prepared by Technical Committee CEN/TC 104 Concrete, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2020, and conflicting national standards shall be withdrawn at the latest by April 2020. This European Standard supersedes EN 9344:2020. This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this standard. This standard is a part of the series EN 934 Admixtures for concrete, mortar and grout which additionally prises the following parts – Part 2: Concrete admixtures Definitions, requirements, conformity, marking and labelling – Part 3: Admixtures for masonry mortar Definitions, requirements, conformity, marking and labelling – Part 5: Admixtures for sprayed concrete Definitions, requirements, conformity, marking and labelling – Part 6: Sampling, conformity control and evaluation of conformity This European Standard is used with the standards of the series EN 480 which prises test methods for admixtures. The annexes A and ZA are informative. According to the CEN/CENELEC Internal Regulations, the national standards anizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A1 This document (EN 9344:2020/A1:2020) has been prepared by Technical Committee CEN/TC 104 ―Concrete and related products‖, the secretariat of which is held by DIN. This Amendment to the European Standard EN 9344:2020 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by April 2020, and conflicting national standards shall be withdrawn at the latest by April 2020. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). According to the CEN/CENELEC Internal Regulations, the national standards anizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 9344:2020 (E) 4 1 Scope This European Standard defines and specifies requirements and conformity criteria for admixtures for the use in grouts for prestressing tendons according to EN 447. It covers admixtures for use in site1) mixed grout only. Provisions for the use of grout admixtures are not part of this standard but are covered by EN 447. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 1962, Methods of testing cement – Part 2: Chemical analysis of cement. EN 1966, Methods of testing cement – Determination of fineness. EN 1971, Cement – Part 1: Composition, specifications and conformity criteria for mon cements. EN 445, Grout for prestressing tendons – Test methods. EN 446, Grout for prestressing tendons – Grouting procedures. EN 447, Grout for prestressing tendons – Specification for mon grout. EN 4806, Admixtures for concrete, mortar and grout – Test methods – Part 6: Infrared analysis. EN 4808, Admixtures for concrete, mortar and grout – Test methods – Part 8: Determination of conventional dry material content. EN 48010, Admixtures for concrete, mortar and grout – Test methods – Part 10: Determination of water soluble chloride。