SIST EN 772-6:2002

Methods of test for masonry units - Part 6: Determination of bending tensile strength of aggregate concrete masonry units

This European Standard specifies a method of determining the bending tensile strength of aggregate concrete masonry units having a width less than 100 mm and a ratio of length to width greater than 10, in accordance with prEN 771-3.

Prüfverfahren für Mauersteine - Teil 6: Bestimmung der Biegezugfestigkeit von Mauersteinen aus Beton

Diese Europäische Norm legt ein Verfahren zur Bestimmung der Biegezugfestigkeit von Mauersteinen aus Beton nach prEN 771-3 mit einer Breite <100 mm und einem Länge-Breite-Verhältnis >10 fest.

Méthodes d'essai des éléments de maçonnerie - Partie 6: Détermination de la résistance a la traction par flexion des éléments de maçonnerie en béton de granulats

La présente Norme européenne décrit une méthode de détermination de la résistance à la  traction par flexion des éléments de maçonnerie en béton de granulats d'une largeur inférieure à 100 mm et ayant un rapport longueur/largeur supérieur à 10, conformément au prEN 771-3.

Metode preskušanja zidakov - 6. del: Določevanje upogibne natezne trdnosti betonskih zidakov

General Information

• Status: Published
• Publication Date: 31-Mar-2002
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: CAA - Mineral binders and masonry
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Apr-2002
• Due Date: 01-Apr-2002
• Completion Date: 01-Apr-2002
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Mandate: M/BC/CEN/87/12 - Standardization request in the field of Construction products - masonry
• Ref Project: EN 772-6:2001 - Methods of test for masonry units - Part 6: Determination of bending tensile strength of aggregate concrete masonry units

Overview

EN 772-6:2001 specifies a standardized test method for determining the bending tensile strength (flexural strength) of thin aggregate concrete masonry units. It applies to units with a width < 100 mm and a length-to-width ratio > 10, and is intended to be used in conjunction with product requirements in prEN 771-3. The method uses a flexural test with roller supports and records the failure load and position of fracture to calculate bending tensile strength in N/mm².

Key topics and requirements

• Scope and applicability: Aggregate concrete masonry units (dense and lightweight aggregates) meeting the geometric limits in the scope.
• Specimen conditioning: Whole-unit specimens are air-dried before testing (conditioning environment and duration specified in the standard) and judged air-dry when mass loss between consecutive weighings (≥ 24 h apart) is < 1%.
• Test apparatus:
  • Test machine per EN 1015-11.
  • Two support rollers and two upper loading rollers (roller diameters typically between 15 and 40 mm). Span between supports is related to specimen height.
  • Most rollers should be able to oscillate slightly to ensure uniform force distribution.
  • Weighing instrument accurate to at least 0.1% of specimen mass.
• Test procedure:
  • Apply load at the two upper rollers positioned at third points of the span.
  • Load at a rate producing failure within 30–90 seconds.
  • Record maximum (failure) load and fracture position; measure cross‑section dimensions at fracture to 0.1 mm.
• Calculation and reporting:
  • Bending tensile strength is calculated from the failure load and specimen dimensions and expressed to the nearest 0.1 N/mm². Results outside the middle third of the span are discarded.
  • Test report must include sample details, specimen orientation, individual and mean strengths, any discarded results, and references to relevant standards.

Applications and users

• Who uses EN 772-6:
  • Test laboratories performing product conformity and quality control testing.
  • Masonry unit manufacturers validating product performance and compliance with prEN 771-3.
  • Certification bodies and regulatory authorities assessing masonry product durability and safety.
  • Designers and structural engineers needing validated flexural strength data for thin masonry elements.
• Practical use:
  • Quality control during production of thin aggregate concrete blocks and tiles.
  • Characterising flexural behavior for structural or non-structural design decisions.
  • Supporting product declarations and conformity assessment for European markets.

Related standards

• prEN 771-3 - Specification for aggregate concrete masonry units (product requirements)
• EN 772-16 - Determination of dimensions of masonry units
• EN 1015-11 - Test machine and related flexural/compressive test method references

Keywords: EN 772-6, bending tensile strength, flexural test, aggregate concrete masonry units, masonry testing, prEN 771-3, EN 772-16.

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2002
0HWRGHSUHVNXãDQMD]LGDNRYGHO'RORþHYDQMHXSRJLEQHQDWH]QHWUGQRVWL
EHWRQVNLK]LGDNRY
Methods of test for masonry units - Part 6: Determination of bending tensile strength of
aggregate concrete masonry units
Prüfverfahren für Mauersteine - Teil 6: Bestimmung der Biegezugfestigkeit von
Mauersteinen aus Beton
Méthodes d'essai des éléments de maçonnerie - Partie 6: Détermination de la résistance
a la traction par flexion des éléments de maçonnerie en béton de granulats
Ta slovenski standard je istoveten z: EN 772-6:2001
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 772-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2001
ICS 91.100.30
English version
Methods of test for masonry units - Part 6: Determination of
bending tensile strength of aggregate concrete masonry units
Méthodes d'essai des éléments de maçonnerie - Partie 6: Prüfverfahren für Mauersteine - Teil 6: Bestimmung der
Détermination de la résistance à la traction par flexion des Biegezugfestigkeit von Mauersteinen aus Beton
éléments de maçonnerie en béton de granulats
This European Standard was approved by CEN on 18 August 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 772-6:2001 E
worldwide for CEN national Members.

Content
page
Foreword.3
1 Scope .4
2 Normative references.4
3 Principle.4
4 Symbols .4
5 Apparatus.4
6 Preparation of specimens.5
7 Test procedure .5
8 Calculation of results.5
9 Test report.6
Foreword
This European Standard has been prepared by Technical Committee CEN/TC 125 ’Masonry’, the
secretariat of which is held by BSI.
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 March 2002, and conflicting national standards shall
be withdrawn at the latest by June 2003.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
Netherlands, Norway, Portugal, Spain, Sweden, S
...