EN 12269-2:2010

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bestimmung des Verbundverhaltens zwischen Bewehrungsstahl und dampfgehärtetem Porenbeton mit Hilfe der Balkenprüfung - Teil 2: LangzeitprüfverfahrenDétermination du comportement d'adhérence entre les barres d'armature et le béton cellulaire autoclavé selon la méthode d'essai de poutre - Partie 2 : Essai de longue duréeDetermination of the bond behaviour between reinforcing steel and autoclaved aerated concrete by the beam test - Part 2: Long term test91.100.30Beton in betonski izdelkiConcrete and concrete productsICS:Ta slovenski standard je istoveten z:EN 12269-2:2010SIST EN 12269-2:2010en,fr,de01-julij-2010SIST EN 12269-2:2010SLOVENSKI
STANDARDSIST EN 12269-2:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12269-2
March 2010 ICS 91.080.40; 91.100.30 Supersedes EN 12269-2:2003English Version
Determination of the bond behaviour between reinforcing steel and autoclaved aerated concrete by the beam test - Part 2: Long term test
Détermination du comportement d'adhérence entre les barres d'armature et le béton cellulaire autoclavé selon la méthode d'essai de poutre - Partie 2 : Essai de longue durée
Bestimmung des Verbundverhaltens zwischen Bewehrungsstahl und dampfgehärtetem Porenbeton mit Hilfe der Balkenprüfung - Teil 2: Langzeitprüfverfahren This European Standard was approved by CEN on 23 January 2010.
CEN members are bound to comply 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 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 Management Centre has the 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, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12269-2:2010: ESIST EN 12269-2:2010

The main changes with respect to EN 12269-2:2003 are listed below: a) the clause "Terms and definitions" has been added; b) the normative references have been updated; c) provisions on the conditioning of test specimens have been added; d) the clause on "Apparatus" has been adapted to take account of the latest findings; e) "long term loading" has been replaced by "cyclic loading" in the clause on "Testing procedure"; f) the requirements for the test report have been expanded. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 12269-2:2010

Core drill with a diameter of the cutting edge of (200 to 300) mm, depending on the specimen height (see 6.4), for removing the AAC in the tensile zone of the cross-section in the midspan area of the beam. 5.3
Straight-edge and 0,1 mm feeler gauges for checking the planeness of surface areas where loads and support reactions are transmitted. 5.4
Room capable of maintaining a temperature of (20 ±±±± 5) °C or (50 ±±±± 5) °C, for conditioning of test beams prior to the test and during the execution of the cyclic loading and the final short term test. 5.5
For the cyclic loading: cyclic loading machine with a capacity of at least 20 kN, allowing the application of an alternating transverse four point load (see Figure 1) on a test specimen with a span of 600 mm to 1 200 mm for a specified number of sinusoidal cycles at a constant frequency up to 5 Hz and alternating between load levels Fmin and Fmax.
The beam shall rest on two supporting rollers through steel distribution plates having a width of
(50 ± 2) mm and a thickness of ≥ 10 mm, extending over the full width of the beam. At least one of the rollers shall be capable of being inclined in a plane perpendicular to the longitudinal axis of the beam. The supporting rollers shall be placed at a distance of 50 mm from the end surfaces of the beam. The load shall be applied equally to both beam parts, using a bridge profile resting on two rollers positioned perpendicularly to the longitudinal axis of the beam with a distance of (200 ± 2) mm. Between the rollers and the upper surface of the beam steel distribution plates with a width of (50 ± 2) mm and a thickness of ≥ 10 mm, extending over the full width of the beam, shall be inserted. Both the supporting rollers and the load-applying rollers shall be manufactured from steel and shall have a circular cross-section with a diameter between 15 mm and 40 mm. Their length shall be at least equal to the width of the beam. The axes of all rollers shall be parallel to each other. Each roller, except one of the supporting ones, shall be capable of rotating around its longitudinal axis and of being inclined in a plane normal to the longitudinal axis of the beam. After correct centring in the testing machine, the axes of inclination of the three inclinable rollers shall be situated on a vertical plane which shall not deviate by more than ± 1 mm from the axis of the compression force of the testing machine. The middle axis between the loading rollers or the supporting rollers, respectively, shall not deviate from the vertical axis of the testing machine (axis of the vertical compression force) by more than ± 1 mm. 5.6
For the final short term test: same or a similar loading system as for 5.5, but with a capacity of approximately 30 kN.
Deflections shall be determined at midspan by means of a transducer and shall be used for control of rate of movement of the platen of the testing machine or of the loading device. 5.7
Measuring system, capable of simultaneous measuring and registration of the following data:  longitudinal strain in the bar at midspan (accuracy 2 % of the final measured value);  slip of the bar at both ends relative to the end surface of the beam (accuracy 0,01 mm). 6 Test specimens 6.1 Sample The sample for the preparation of the test specimens shall be taken in such a manner that it is representative of the product to be investigated. SIST EN 12269-2:2010

h = (200 ± 2) mm;  width:
b = (20 φ ± 2) mm, where φ is the nominal diameter of the steel bar (without corrosion protective coating), in millimetres;  AAC cover:
10 mm ≤ c ≤ 30 mm. The total length of the beam shall be chosen such that lb = (40φ ± 50) mm on each side, where lb is the bond length over which the bar is in contact with the AAC. Dimensions in millimetres
Key 1 Transducer for vertical displacement 2 Free bar end 3 Strain measuring base lb Bond length = (40 φ ± 50) mm c AAC cover a (200 to 250) mm for AAC cover c = (10 to 30) mm or 300
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