1、raising standards worldwide NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BSI Standards Publication BS EN 1520:2011 Prefabricated reinforced components of lightweight aggregate concrete with open structure with structural or non-structural reinforcementBS EN 1520:2011 BRITIS
2、H STANDARD National foreword This British Standard is the UK implementation of EN 1520:2011. It supersedes BS EN 1520:2002 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee B/523, Prefabricated components of reinforced autoclaved aerated concrete and li
3、ghtweight aggregate concrete with open structure. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 IS
4、BN 978 0 580 59023 8 ICS 91.100.30 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2011. Amendments issued since publication Date Text affectedBS EN 15
5、20:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1520 March 2011 ICS 91.100.30 Supersedes EN 1520:2002 English Version Prefabricated reinforced components of lightweight aggregate concrete with open structure with structural or non-structural reinforcement Composants prfabriqus en bton de
6、 granulats lgers structure ouverte avec des armatures structurales et non- structurales Vorgefertigte Bauteile aus haufwerksporigem Leichtbeton und mit statisch anrechenbarer oder nicht anrechenbarer Bewehrung This European Standard was approved by CEN on 5 February 2011. CEN members are bound to co
7、mply 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-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENEL
8、EC Management Centre 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 CEN-CENELEC Management Centre has the
9、same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
10、 Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any
11、means reserved worldwide for CEN national Members. Ref. No. EN 1520:2011: EBS EN 1520:2011 EN 1520:2011 (E) 2 Contents Page Foreword 7 1 Scope 10 2 Normative references 10 3 Terms, definitions, symbols and abbreviations . 13 3.1 Terms and definitions . 13 3.2 Symbols 13 3.2.1 General symbols 13 3.2.
12、2 Subscripts 14 3.2.3 Symbols used in this European Standard 14 3.3 Abbreviations . 19 3.4 Units 19 4 Properties and requirements of materials 20 4.1 Constituents . 20 4.1.1 General 20 4.1.2 Release of dangerous substances . 20 4.2 Lightweight aggregate concrete parameters . . 20 4.2.1 Dry density .
13、 20 4.2.2 Characteristic strength values . 21 4.2.3 Compressive strength . 21 4.2.4 Flexural strength and uniaxial tensile strength 23 4.2.5 Stress-strain diagram . . 23 4.2.6 Modulus of elasticity . 24 4.2.7 Poissons ratio . 24 4.2.8 Coefficient of thermal expansion . 24 4.2.9 Drying shrinkage. . 2
14、4 4.2.10 Creep . 25 4.2.11 Thermal conductivity . 25 4.2.12 Water vapour permeability . . 27 4.2.13 Water tightness . . 27 4.3 Reinforcement steel . . 27 5 Properties and requirements of components . 28 5.1 General 28 5.1.1 Mechanical resistance . 28 5.1.2 Deflections 28 5.1.3 Acoustic properties .
15、28 5.1.4 Reaction to fire and resistance to fire . 29 5.1.5 Design thermal resistance and design thermal conductivity . 29 5.2 Types of components . . 30 5.2.1 General 30 5.2.2 Roof and floor components . . 31 5.2.3 Wall components . 31 5.2.4 Beams and piers . . 31 5.2.5 Other prefabricated componen
16、ts . 31 5.3 Detailing, technical requirements, and declared properties . 31 5.3.1 Detailing 31 5.3.2 Dimensions and tolerances . . 31 5.3.3 Mass of the components . 32 5.3.4 Deflections 32 5.3.5 Strength of joints . 32 5.3.6 Minimum requirements . 32 5.3.7 Reinforcement detailing . . 32 5.4 Addition
17、al requirements for roof and floor components and beams . 33 5.4.1 Minimum dimensions 33 BS EN 1520:2011 EN 1520:2011 (E) 3 5.4.2 Minimum requirements for structural reinforcement 33 5.4.3 Support length . 34 5.5 Additional requirements for wall components . 35 5.5.1 General 35 5.5.2 Walls with non-
18、structural reinforcement. 35 5.5.3 Walls with structural reinforcement 35 5.6 Durability 36 5.6.1 General 36 5.6.2 Minimum cover with regard to bond 37 5.6.3 Exposure classes related to environmental conditions 37 5.6.4 Corrosion protection of reinforcement . 38 5.6.5 Freeze-thaw resistance . 40 6 E
19、valuation of conformity. 40 6.1 Introduction 40 6.2 Initial type-testing of the component . 41 6.2.1 General 41 6.2.2 Sharing of results from ITT . 41 6.3 Factory production control . 42 6.3.1 General 42 6.3.2 Process control 42 6.3.3 Finished products 42 6.4 Initial inspection of the factory and th
20、e factory production control 43 6.4.1 Information to be supplied. . 43 6.4.2 Inspection . 43 6.4.3 Reports . 43 6.5 Surveillance, assessment and approval of the factory production control 43 6.5.1 Inspection tasks . 43 6.5.2 Frequency of inspections . 43 6.5.3 Reports . 44 6.6 Actions to be taken in
21、 the event of non-conformity 44 7 Basis for design . 50 7.1 Design methods . 50 7.2 Limit states . 50 7.3 Actions 50 8 Marking, labelling and designation 51 8.1 Standard designation 51 8.2 Additional information on accompanying documents 52 Annex A (normative) Design of components by calculation 53
22、Annex B (informative) Design of components by testing 81 Annex C (informative) Recommended values for partial safety factor 87 Annex ZA (informative) Provisions for the CE marking of prefabricated components of lightweight aggregate concrete with open structure with structural or non-structural rein
23、forcement under the EU Construction Product Directive . 88 Bibliography 109 BS EN 1520:2011 EN 1520:2011 (E) 4 Figures Figure 1 Determination of dry thermal conductivity 10dry.26 Figure 2 Examples of multilayer slab, hollow core slab and solid slab (With respect to transverse reinforcement, see 5.4.
24、2.1) 34 Figure 3 Support length a 0 35 Figure 4 Basic design of hollow core wall components .36 Figure A.1 Bi-linear stress-strain diagram for LAC in compression for cross-sectional design .55 Figure A.2 Design stress-strain diagram for reinforcement steel .56 Figure A.3 Possible strain diagrams in
25、the ultimate limit state 56 Figure A.4 Limits of slenderness ratio S of loadbearing walls and piers 62 Figure A.5 Design loads for cellar walls .67 Figure A.6 Additional horizontal force H fddue to inclination of the components and effects of second order theory.72 Figure A.7 Tensile splitting force
26、s in wall components with oversail s .73 Figure A.8 Tensile splitting forces at the top of a hollow core wall component. 74 Figure A.9 Tensile splitting force T due to centric loading 75 Figure A.10 Anchorage of smooth reinforcing bars .79 Figure A.11 Anchorage of ribbed reinforcing bars .79 Figure
27、B.1 Definition of shear span l s.83 Figure B.2 Simplified / interaction diagram of the cross-section, representing results of three test series .86 Figure ZA 1 Example of CE marking with Method 1 101 Figure ZA 2 Example of CE marking with Method 2 103 Figure ZA.3 Example of CE marking with Method 3a
28、 105 Figure ZA.4 Example of CE marking with Method 3b 107 Figure ZA.5 Example of simplified label .108 Tables Table 1 Tolerances on declared mean dry density of LAC 20 Table 2 Density classes of LAC .21 Table 3 Determination of the characteristic strength f kand required minimum strength f min.21 Ta
29、ble 4 Statistical coefficient K n for determination of characteristic strength .22 Table 5 Reduction factors for compressive strength of cores with indicated diameter and equal length of cubes.22 BS EN 1520:2011 EN 1520:2011 (E) 5 Table 6 Conversion factors for conversion of test results of cast tes
30、t specimens to the strength of reference test specimens (drilled cores of 100 mm diameter and length or 100 mm cubes) 22 Table 7 Strength classes and strength requirements for LAC . 23 Table 8 Dry thermal conductivity 10dryof LAC for 50 % and 90 % of production, with a confidence level = 90 % (compi
31、led according to EN 1745) 27 Table 9 Basic values for moisture content and moisture conversion coefficient of LAC (compiled according to EN ISO 10456) 29 Table 10 Types of components 30 Table 11 Maximum permissible deviation from squareness in the plane of components . 32 Table 12 Minimum percentage
32、 of reinforcement R 33 Table 13 Description of permissible exposure classes with respect to risk of reinforcement corrosion 37 Table 14 Embedding in a zone of normal concrete or LC-concrete with closed structure - Minimum concrete cover in mm . 38 Table 15 Minimum concrete cover in mm for hot dip ga
33、lvanized reinforcement steel . 39 Table 16 Minimum concrete cover in mm with regard to durability and test method to pass by initial type-test and FPC for bars with a corrosion protective coating 40 Table 17 Initial type-testing of the LAC components . 45 Table 18 Factory production control, testing
34、 of the finished product LAC components for structural uses . 46 Table 19 Factory production control, testing of the finished product, LAC components for non-loadbearing uses. 48 Table A.1 Minimum percentages of shear reinforcement w,minfor reinforcement steel with f yk = 500 MPa . 60 Table A.2 Coef
35、ficient for the determination of the buckling length l 0 at different boundary conditions (used in Equation (A. 25), l 0= l w ) . 64 Table A.3 Required dimensions of beams without verification of loadbearing capacity 71 Table A.3 Limits of reinforcement in roof and floor components for design by cal
36、culation (plain steel, with characteristic yield strength f yk 220 MPa) . 78 Table C.1 Partial safety factors Mfor material properties . 87 Table C.2 Partial safety factors compfor components 87 Table ZA.1a Harmonised clauses for loadbearing wall components . 89 Table ZA.1b Harmonised clauses for re
37、taining wall components 90 Table ZA.1c Harmonised clauses for roof components . 91 Table ZA.1d Harmonised clauses for floor components 92 Table ZA.1e Harmonised clauses for linear components 93 Table ZA.1f Harmonised clauses for non-loadbearing wall components 94 Table ZA.1g Harmonised clauses for cladding components . 95
