BS EN 15361-2007 Determination of the influence of the corrosion protection coating on the anchorage capacity of the transverse anchorage bars in prefabricated reinforced component.pdf

1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58coating on the anchorage capacity of the transverse anchorage bars in prefabricated reinforced comp

2、onents of autoclaved aerated concreteThe European Standard EN 15361:2007 has the status of a British StandardICS 91.100.30Determination of the influence of the corrosion protection BRITISH STANDARDBS EN 15361:2007BS EN 15361:2007This British Standard was published under the authority of the Standard

3、s Policy and Strategy Committee on 30 April 2007 BSI 2007ISBN 978 0 580 50637 6Amendments issued since publicationAmd. No. Date CommentsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British

4、 Standard cannot confer immunity from legal obligations.National forewordThis British Standard was published by BSI. It is the UK implementation of EN 15361:2007. The UK participation in its preparation was entrusted to Technical Committee B/523, Prefabricated components of reinforced autoclaved aer

5、ated concrete and lightweight aggregate concrete with open structure.A list of organizations represented on this committee can be obtained on request to its secretary.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 15361April 2007ICS 91.100.30English VersionDetermination of the influence of the co

6、rrosion protectioncoating on the anchorage capacity of the transverse anchoragebars in prefabricated reinforced components of autoclavedaerated concreteDtermination de linfluence de la protection contre lacorrosion sur la capacit dancrage des barres dancragetransversales dans les composants prfabriq

7、us en btoncellulaire autoclav armBestimmung des Einflusses des Korrosionsschutzberzugsauf die aufnehmbare Verankerungskraft der zurVerankerung benutzten Querstbe in vorgefertigtenbewehrten Bauteilen aus dampfgehrtetem PorenbetonThis European Standard was approved by CEN on 24 February 2007.CEN membe

8、rs are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application

9、to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the sa

10、me status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Roma

11、nia, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedwor

12、ldwide for CEN national Members.Ref. No. EN 15361:2007: EEN 15361:2007 (E) 2 Contents Page Foreword3 1 Scope 4 2 Normative references 4 3 Principle4 4 Apparatus .4 5 Test specimens5 5.1 General5 5.2 Measurement of the mean outer diameter of the transverse bar with the corrosion protection coating5 5

13、.3 Shape, size and preparation of test specimens .5 5.4 Conditioning of test specimens .10 6 Procedure .10 6.1 Pull out test 10 6.2 Determination of dry density and compressive strength of AAC.11 7 Evaluation of test results 11 7.1 Elimination of bond between longitudinal steel bar and AAC 11 7.2 Ca

14、lculation of bearing stress of the transverse bar.11 8 Test report 12 Bibliography 13 Figures Figure 1 Example for cutting scheme . 6 Figure 2 Test specimen type A (without transverse bar) and test arrangement 7 Figure 3 Test specimen type B and test arrangement 8 Figure 4 Test specimen type C and t

15、est arrangement 9 EN 15361:2007 (E) 3 Foreword This document (EN 15361:2007) has been prepared by Technical Committee CEN/TC 177 “Prefabricated reinforced components of autoclaved aerated concrete or light-weight aggregate concrete with open structure”, the secretariat of which is held by DIN. This

16、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 October 2007, and conflicting national standards shall be withdrawn at the latest by October 2007. According to the CEN/CENELEC Internal Regulations, the

17、 national standards organizations of the following countries are bound to implement this European Standard : Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, No

18、rway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 15361:2007 (E) 4 1 Scope This document specifies a pull-out test method for the verification of the applicability of the declared outer diameter of the transverse bars with corrosion protection coa

19、ting tot,gin the calculation of the anchorage capacity of transverse anchorage bars (see A.10.3 in prEN 12602:2006) in prefabricated reinforced components of autoclaved aerated concrete (AAC). 2 Normative references The following referenced documents are indispensable for the application of this doc

20、ument. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 678, Determination of the dry density of autoclaved aerated concrete EN 679, Determination of the compressive strength of autoclav

21、ed aerated concrete 3 Principle Pull-out tests on prismatic AAC test specimens including a longitudinal bar with a welded transverse anchorage bar with corrosion protection coating (see 5.3, type C) are made. The bearing stress in front of the welded transverse anchorage bar is calculated using the

22、measured mean outer diameter tot,m.of the welded transverse bar including the coating. For comparison, pull-out tests are made on otherwise alike test specimens, where the welded transverse bar is without corrosion protection coating, but has been treated with a thin layer of coating for elimination

23、 of bond (see 5.3 Type B). In this case the bearing stress in front of the transverse anchorage bar is calculated using the diameter of the transverse bar t(without coating). In both cases the bond between the longitudinal bar and the AAC is eliminated using a proper method. NOTE Comparison of the d

24、etermined bearing stresses will show if it is applicable to use the declared effective outer diameter of the transverse bar with corrosion protection coating, tot,g, in the calculation of the anchorage capacity of the transverse anchorage bars. 4 Apparatus a) saw for cutting test specimens from rein

25、forced AAC components without excessive heating, vibration or shock; b) testing machine or a loading device capable of applying a tension force at the required steady rate without shock and with an accuracy of 2 % of the ultimate pull-out force; c) rigid steel base plate with a central hole of 20 mm

26、 diameter to accommodate for the protruding longitudinal bar of the test specimen; d) intermediate layer of soft fibre board (thickness 10 mm to 20 mm, density 250 kg/m3to 300 kg/m3, with a central hole of 20 mm diameter, to be inserted between the test specimen and the rigid steel plate; e) device

27、for measuring the slip between the longitudinal reinforcing bar and the AAC to an accuracy of 1/100 mm and for recording the load-slip curve; EN 15361:2007 (E) 5 f) callipers capable of measuring the outer diameter of the transverse bar and the corrosion protection coating to an accuracy of 0,1 mm;

28、g) ventilated drying oven, capable of maintaining a temperature of (105 5) C; h) balance for weighing test specimens to an accuracy of 0,1 %. 5 Test specimens 5.1 General The test specimens are obtained by cutting them e.g. from specially reinforced AAC components with a saw so that the longitudinal

29、 bar is in the middle of a 200 mm 200 mm AAC cross-section. The transverse bars (short sections of 60 mm length welded in centre to the longitudinal bar) shall be located in a distance of approximately 200 mm from the supported surface of the test specimen. 5.2 Measurement of the mean outer diameter

30、 of the transverse bar with the corrosion protection coating The outer diameter of the coated transverse bar shall be measured before the reinforcement is embedded in AAC. The measurement shall be performed by means of callipers at least at 6 different places of the coated transverse bar in perpendi

31、cular direction to the longitudinal bar. The mean value of the individual measurements tot,mshall be determined. 5.3 Shape, size and preparation of test specimens Three types of AAC test specimens with the dimensions of 200 mm 200 mm 250 mm are prepared: Type A. Three test specimens including a (7 0

32、,5) mm longitudinal steel bar where bond between steel and AAC is eliminated using the same method as in type C test specimens, see Figure 2. They are for the verification that the bond has been adequately eliminated between the longitudinal bar and the AAC. NOTE Tests made with type A test specimen

33、s (i.e. verification of the elimination of bond) are not necessary if previous tests have shown that the method used for the elimination of bond in reliable. Type B. Three test specimens including a (7 0,5) mm longitudinal steel bar where bond between steel and AAC is eliminated using the same metho

34、d as in type C test specimens and a (7 0,5) mm transverse bar (length L = 60 mm) with thin layer coating for the elimination of bond, see Figure 3. Type C. Three test specimens including a (7 0,5) mm longitudinal steel bar where bond between steel and AAC is eliminated using proper method and a (7 0

35、,5) mm transverse bar (length L = 60 mm) with the coating under consideration, see Figure 4. Furthermore, 3 reference specimens shall be prepared with the same dimensions and the same reinforcement as the test specimens Type C. They shall be dried to constant mass at (105 5) C, and their oven-dry ma

36、ss md,refshall be determined. From each type one test specimen shall be prepared from the upper third of the component, one from the middle and one from the lower third, in the direction of rise of the mass during manufacture (see Figure 1). NOTE The value md,refis needed for the calculation of the

37、required humid mass of the test specimens after conditioning according to NOTE 2 in 5.4. EN 15361:2007 (E) 6 Key 1 direction of rise of mass during manufacture 2 specially reinforced prefabricated AAC-component 3 test specimens with central longitudinal bar (7 0,5) mm 4 welded transverse bar, (7 0,5

38、) mm, length L = 60 mm 5 test specimens Type A 6 test specimens Type B 7 test specimens Type C 8 reference specimens Figure 1 Example for cutting scheme EN 15361:2007 (E) 7 Dimensions in millimetres Key F pull-out force 1 measurement of displacement 2 bond is eliminated 3 longitudinal bar 7 mm in th

39、e middle Figure 2 Test specimen type A (without transverse bar) and test arrangement EN 15361:2007 (E) 8 Dimensions in millimetres Key F pull-out force 1 measurement of displacement 2 bond is eliminated 3 7 mm welded transverse bar, L = 60 mm and thin layer coating for the elimination of bond 4 7 mm

40、 longitudinal bar in the middle Figure 3 Test specimen type B and test arrangement EN 15361:2007 (E) 9 Dimensions in millimetres Key F pull-out force 1 measurement of displacement 2 bond is eliminated 3 7 mm welded transverse bar, L = 60 mm and corrosion protection under consideration 4 7 mm longitu

41、dinal bar in the middle Figure 4 Test specimen type C and test arrangement EN 15361:2007 (E) 10 5.4 Conditioning of test specimens The test specimens shall be stored in such a manner that, when tested, they have a temperature of (20 5) C (see NOTE 1) and a moisture content of (6 2) % by mass (see NO

42、TE 2). If necessary, the test specimens shall be dried or moistened until their mass lies within the calculated limits (see NOTE 2). Subsequently they shall be stored prior to testing for at least 3 d in plastic bags or similar sealing to achieve a sufficiently uniform moisture distribution within t

43、he AAC. The actual moisture content shall be verified by determining the mass of the test specimens in the humid state immediately before the test and after drying at (105 5) C until constant mass has been obtained. The error in determining the mass shall not exceed 0,1 % of the mass of the test spe

44、cimen. The mass of the test specimen is considered constant if after 24 h of further drying it has not changed by more than 0,2 %. The moisture content mis calculated as follows: m= 100 (mh md)/(md ms) (1) where mis the moisture content, in % by mass; mh is the mass of the test specimen in the humid

45、 state, in kg; mdis the mass of the dried test specimen immediately after removal from the drying oven, in kg; msis the mass of the steel reinforcement contained in the test specimen, in kg. NOTE 1 Other temperature may be chosen in special cases. This needs to be indicated in the test report. NOTE

46、2 In order to achieve the prescribed moisture content within the test specimens the following procedure is recommended: The required humid mass of the test specimen is calculated using the following equation: mh,r= md,ref (1 + m/100) (m“s ”m/100) (2) where mh,ris the required mass of the test specim

47、en in the humid state, in kg; md,ref is the dry mass of the reference specimen with the same dimensions and the same reinforcement taken from the same component, the dry mass, in kilograms, being determined according to the last paragraph of 5.2; m“sis the mass of the reinforcement, determined eithe

48、r by weighing or by calculation from the dimensions of the reinforcing bars and the density of steel (7 850 kg/m3), in kg; ”mis the prescribed moisture content, in % by mass (6 2) % by mass). 6 Procedure 6.1 Pull out test A suggested testing arrangement is shown in Figures 2, 3 and 4. The test speci

49、men is placed on the base steel plate so that the protruding longitudinal bar at the bottom of the test specimen goes through the hole in the base plate. The tension force shall be applied on the longitudinal bar. EN 15361:2007 (E) 11 During loading the displacement shall be measured continuously from the protruding longitudinal bar at the top of the test specimen. The load shall be applied at a uniform rate so that the displacement doe