EN 772-14:2001

SLOVENSKI STANDARD
01-april-2002
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Methods of test for masonry units - Part 14: Determination of moisture movement of
aggregate concrete and manufactured stone masonry units
Prüfverfahren für Mauersteine - Teil 14: Bestimmung der feuchtebedingten
Formänderung von Mauersteinen aus Beton und Betonwerksteinen
Méthode d'essai pour des éléments de maçonnerie - Partie 14: Détermination de la
variation dimensionelle due a l'humidité des éléments de maçonnerie en béton de
granulats et en pierre reconstituée
Ta slovenski standard je istoveten z: EN 772-14:2001
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 772-14
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2001
ICS 91.100.30
English version
Methods of test for masonry units - Part 14: Determination of
moisture movement of aggregate concrete and manufactured
stone masonry units
Méthode d'essai pour des éléments de maçonnerie - Partie: Prüfverfahren für Mauersteine - Teil 14: Bestimmung der
14 détermination de la variation due à l'humidité des feuchtebedingten Formänderung von Mauersteinen aus
éléments de maçonnerie en béton de granulats et en pierre Beton und Betonwerksteinen
reconstituée
This European Standard was approved by CEN on 13 October 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.
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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 772-14:2001 E
worldwide for CEN national Members.

Contents
page
Foreword 3
1 Scope 4
2 Normative references 4
3 Principle 4
4 Symbols 4
5 Apparatus 5
6 Preparation of specimens 5
7 Procedure 7
8 Expression of results 9
9 Evaluation of results 9
10 Test report 10
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 May 2002, and conflicting national standards shall
be withdrawn at the latest by March 2004.
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, Switzerland and the United Kingdom.
1 Scope
This European Standard specifies a method of measuring the moisture movement of aggregate
concrete and manufactured stone masonry units between two specified extreme moisture conditions.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text, and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
prEN 771-3, Specification for masonry units - Part 3: Aggregate concrete masonry units (dense and
lightweight aggregates).
prEN 771-5, Specification for masonry units - Part 5: Manufactured stone masonry units.
3 Principle
This test measures, on masonry units of the same concrete compositions and the same sampling:
a) the expansion between the initial condition and after soaking in water for 4 days;
b) the shrinkage between the initial condition and after drying for 21 days in a ventilated
oven at 33 °C.
4 Symbols
l is the initial distance between gauge location pads, (mm)
i
l is the distance between gauge location pads after soaking, (mm)
i
l is the distance between gauge location pads after drying, (mm)
2i

l /l is the mean moisture expansion coefficient, (mm/m)
g

l /l is the mean drying shrinkage coefficient, (mm/m)
r

l /l is the total movement coefficient, (mm/m)
c

l /l is the individual moisture expansion coefficient, (mm/m)
gi

l /l is the individual drying shrinkage coefficient, (mm/m)
ri
m is the mass of specimen before drying, (g)
o,s
m is the mass of specimen after drying, (g)
dry,s
w is the moisture content, (%) by mass
s
5 Apparatus
5.1 Gauge location pads.
5.2 Adhesive appropriate for use under the conditions given in 5.4 and 5.5.
5.3 Measuring device suitable for measuring changes in length with an accuracy of at least
0,002 mm.
5.4 Ventilated oven with a volume of at least 9 times the volume of the specimens to be dried at one
time, capable of being maintained at a temperature of 33 °C ± 3°C. The oven is ventilated top and
bottom for free convection or by a forced system that ensures at least 3 air changes per hour.
5.5 Tank of water, maintained at a temperature of 20 °C ± 2 °C and of sufficient volume to hold all
the specimens to be soaked at one time and to ensure free access of the water to all faces.
5.6 Weighing instrument capable of weighing the specimens with an accuracy of 0,1 %.
5.7 Calibration rods of Invar steel.
maximum cross-section
...