EN 772-1:2011+A1:2015

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prüfverfahren für Mauersteine - Teil 1: Bestimmung der DruckfestigkeitMéthodes d'essai des éléments de maçonnerie - Partie 1: Détermination de la résistance à la compressionMethods of test for masonry units - Part 1: Determination of compressive strength91.100.15Mineralni materiali in izdelkiMineral materials and productsICS:Ta slovenski standard je istoveten z:EN 772-1:2011+A1:2015SIST EN 772-1:2011+A1:2015en,fr,de01-oktober-2015SIST EN 772-1:2011+A1:2015SLOVENSKI
STANDARDSIST EN 772-1:20111DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 772-1:2011+A1
June 2015 ICS 91.100.25 Supersedes EN 772-1:2011English Version
Methods of test for masonry units - Part 1: Determination of compressive strength
Méthodes d'essai des éléments de maçonnerie - Partie 1: Détermination de la résistance à la compression
Prüfverfahren für Mauersteine - Teil 1: Bestimmung der Druckfestigkeit This European Standard was approved by CEN on 25 December 2010 and includes Amendment 1 approved by CEN on 14 May 2015.
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-CENELEC 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 same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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Conversion of the compressive strength of masonry units to the normalised compressive strength . 12 Annex B (normative)
Surface preparation and conditioning of units . 13
normalised compressive strength of masonry unit (N/mm2); d shape factor multiplier used to convert the air-dry compressive strength of the masonry specimens to the normalised compressive strength. SIST EN 772-1:2011+A1:2015

% Maximum permissible mean error of forces as percentage of indicated force
% Maximum permissible error of zero force as percentage of maximum force of range
% 2,0 ± 2,0 ± 0,4 The testing machine shall have adequate capacity to crush all the test specimens, but the scale used shall be such that the failure load on the specimen exceeds one-fifth of the full scale reading. The machine shall be provided with a load-pacer or equivalent means to enable the load to be applied at the rate given in 8.2. The testing machine shall be equipped with two steel-bearing platens. The stiffness of the platens and the manner of load transfer shall be such that the deflection of the platen surfaces at failure load shall be less than 0,1 mm measured over 250 mm. The platens shall either be through hardened or the faces case hardened. The testing faces shall have a Vickers hardness of at least 600 HV when tested in accordance with EN ISO 6507-1. One platen of the machine shall be able to align freely with the specimens as contact is made, but shall be restrained by friction or other means from tilting during loading. The other platen shall be a plane non-tilting block. The bearing faces of both platens shall be larger than the size of the largest specimen to be tested. Where auxiliary platens are used, they shall be properly located and of the same hardness, stiffness and planeness as the main platens. The bearing surfaces of the platens shall not depart from a plane by more than 0,05 mm. 6.2 Weighing instrument capable of weighing specimens to an accuracy of 0,1 % of their mass. 6.3 Sufficient stiff steel strips for use on shell bedded or strip bedded ground units (See 8.1). 7 Preparation of specimens 7.1 Sampling The method of sampling shall be in accordance with the relevant part of EN 771. The minimum number of specimens shall be six, but a larger minimum number may be specified in the product specification, in which case that larger number shall be used. In the case of large masonry units representative portions, e.g. cubes, may be cut from the masonry unit in different positions as stated in the relevant part of EN 771 (see also Note to 7.2.4). SIST EN 772-1:2011+A1:2015
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