SIST EN 12269-2:2010
(Main)Determination of the bond behaviour between reinforcing steel and autoclaved aerated concrete by the beam test - Part 2: Long term test
Determination of the bond behaviour between reinforcing steel and autoclaved aerated concrete by the beam test - Part 2: Long term test
This document specifies a method of determining the long term bond behaviour between reinforcing bars and autoclaved aerated concrete (AAC) in prefabricated reinforced components according to EN 12602. The test method is conceived to obtain values for the long term bond strength fb,l which are obtained in a final short term test. The test is performed for different combinations of AAC type, bar shape, and corrosion protection systems.
Bestimmung des Verbundverhaltens zwischen Bewehrungsstahl und dampfgehärtetem Porenbeton mit Hilfe der Balkenprüfung - Teil 2: Langzeitprüfverfahren
Diese Europäische Norm legt ein Verfahren zur Bestimmung des Langzeit-Verbundverhaltens zwischen Bewehrungsstäben und dampfgehärtetem Porenbeton in vorgefertigten bewehrten Bauteilen nach prEN 12602 fest. Das Prüfverfahren ist dafür gedacht, Werte der Langzeit-Verbundfestigkeit fb,l zu gewinnen, die in einer abschließenden Kurzzeitprüfung bestimmt werden. Die Prüfung wird für verschiedene Kombinationen von Porenbetonart, Stabform und Korrosionsschutzsystem durchgeführt.
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
La présente Norme européenne spécifie une méthode de détermination du comportement d’adhérence à long terme entre les barres d’armature et le béton cellulaire autoclavé (BCA) dans les éléments préfabriqués armés conformes au prEN 12602. La méthode d’essai est conçue pour obtenir les valeurs de la résistance d’adhérence à long terme fb,l qui sont obtenues lors d’un essai final de courte durée. L’essai est réalisé pour différentes combinaisons de types de béton cellulaire autoclavé (BCA), de forme de barres et de systèmes de protection contre la corrosion.
Določevanje sprijemnosti med armaturnim železom in avtoklaviranim celičastim betonom s preskusom nosilca - 2. del: Dolgotrajni preskus
Ta dokument opredeljuje metodo določevanja dolgotrajne sprijemnosti med armaturnimi palicami in avtoklaviranim celičastim betonom (AAC) v gotovih armiranih elementih v skladu z EN 12602. Preskusna metoda je zasnovana za pridobivanje vrednosti dolgotrajne sprijemne moči v FB, ki so pridobljene v končnem kratkoročnem preskusu. Preskus se izvaja za različne kombinacije tipa AAC, oblike palice in sistemov za zaščito proti koroziji.
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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
SIST EN 12269-2:2010
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
EN 12269-2:2010 (E) 2 Contents Page Foreword . 31Scope . 42Normative references . 43Terms and definitions . 44Principle . 45Apparatus . 46Test specimens . 56.1Sample . 56.2Shape and size of test specimens . 66.3Number of test specimens . 76.4Preparation of test specimens . 77Testing procedure. 87.1Cyclic loading . 87.2Final short term test . 87.3Dry density, moisture content and compressive strength of AAC . 88Test results . 99Test report . 9Bibliography . 11 Figures Figure 1 — Test specimen and loading arrangement . 6Figure 2 — Sampling scheme for test specimens . 7 SIST EN 12269-2:2010
EN 12269-2:2010 (E) 3 Foreword This document (EN 12269-2:2010) has been prepared by Technical Committee CEN/TC 177 “Prefabricated reinforced components of autoclaved aerated concrete or lightweight aggregate concrete with open structure”, 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 September 2010, and conflicting national standards shall be withdrawn at the latest by September 2010. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12269-2:2003. The European Standard EN 12269 consists of the following parts: Part 1: Short term test; Part 2: Long term test. In order to meet the performance requirements as laid down in the product standard for prefabricated components of autoclaved aerated concrete, a number of standardized test methods are necessary.
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
EN 12269-2:2010 (E) 4 1 Scope This document specifies a method of determining the long term bond behaviour between reinforcing bars and autoclaved aerated concrete (AAC) in prefabricated reinforced components according to EN 12602. The test method is conceived to obtain values for the long term bond strength fb,l which are obtained in a final short term test. The test is performed for different combinations of AAC type, bar shape, and corrosion protection systems. 2 Normative references The following referenced documents are indispensable for the application of this document. 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 autoclaved aerated concrete EN 1353, Determination of moisture content of autoclaved aerated concrete EN 12269-1:2000, Determination of the bond behaviour between reinforcing steel and autoclaved aerated concrete by the “beam test” Part 1: Short term test 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 long term bond strength fb,l bond stress (residual bond strength) achieved at the final short term test 4 Principle The long term bond behaviour of reinforcing bars embedded in AAC is investigated in two steps as follows: 1) Cyclic loading of a prismatic test specimen by a transverse four point load alternating between Fmin and Fmax at a constant frequency for a specified number of cycles at a temperature of (20 ± 5) °C or at a temperature of (50 ± 5) °C. The test specimen contains in longitudinal direction one single reinforcing bar situated on the longitudinal median plane near the bottom surface (see EN 12269-1). 2) Final short term test (in the same condition as in step 1) according to EN 12269-1 on this test specimen in order to determine the long term bond strength fb,l obtained from final short term test. 3) Prior to the test, the test specimens shall be stored with enough free space around them enabling sufficient air circulation for a period of (48 ± 2) h in a room with a constant temperature of (20 ± 5) °C or (50 ± 5) °C. 5 Apparatus 5.1 Saw for cutting test specimens from reinforced components. SIST EN 12269-2:2010
EN 12269-2:2010 (E) 5 5.2
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 app
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