SIST EN 772-18:2011

Methods of test for masonry units - Part 18: Determination of freeze-thaw resistance of calcium silicate masonry units

This European Standard specifies a method of determining the freeze-thaw resistance of calcium silicate masonry units.

Prüfverfahren für Mauersteine - Teil 18: Bestimmung des Frostwiderstandes von Kalksandsteinen

Diese Europäische Norm legt ein Prüfverfahren zur Bestimmung des Frostwiderstandes von Kalksandsteinen fest.

Méthodes d'essai des éléments de maçonnerie - Partie 18: Détermination de la résistance au gel/dégel des éléments de maçonnerie en silico-calcaire

La présente Norme européenne spécifie une méthode de détermination de la résistance au gel/dégel des
éléments de maçonnerie en silico-calcaire.

Metode preskušanja zidakov - 18. del: Ugotavljanje zmrzlinske odpornosti apneno peščenih zidakov

Ta evropski standard določa metodo za ugotavljanje zmrzlinske odpornosti apneno peščenih zidakov.

General Information

• Status: Published
• Public Enquiry End Date: 14-Oct-2010
• Publication Date: 16-Jun-2011
• ICS: 91.100.15 - Mineral materials and products
• Technical Committee: CAA - Mineral binders and masonry
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 30-May-2011
• Due Date: 04-Aug-2011
• Completion Date: 17-Jun-2011
• Ref Project: EN 772-18:2011 - Methods of test for masonry units - Part 18: Determination of freeze-thaw resistance of calcium silicate masonry units

Relations

• Replaces: SIST EN 772-18:2000 - Methods of test for masonry units - Part 18: Determination of freeze-thaw resistance of calcium silicate masonry units
• Effective Date: 01-Jul-2011

Overview

SIST EN 772-18:2011, developed by the European Committee for Standardization (CEN), defines the standardized method for determining the freeze-thaw resistance of calcium silicate masonry units. This method is essential for assessing the durability and quality of calcium silicate masonry units exposed to cyclic freezing and thawing conditions. The standard ensures reliable performance data to support construction practices in environments subject to frost effects.

Freeze-thaw resistance testing under this standard involves subjecting masonry samples to controlled cycles of water immersion, freezing at -15 °C, and thawing, followed by a detailed evaluation of physical damage and compressive strength changes. This test method supports manufacturers, testing laboratories, and regulatory authorities in verifying masonry unit resilience and compliance with durability requirements.

Key Topics

• Scope: Specifies the test method for freeze-thaw resistance of calcium silicate masonry units.
• Test Principle: Specimens are conditioned by immersion in water, then exposed to repeated freeze-thaw cycles, simulating real environmental conditions. Damage is evaluated visually and by measuring compressive strength reduction.
• Sampling Requirements: Differentiates sampling procedures based on masonry unit dimensions-either by whole units or cut specimens to ensure representativeness.
• Test Procedure:
  • Gradual immersion of specimens in water at 20 °C ± 5 °C.
  • Freezing in a cabinet reducing temperature to -15 °C within 3-5 hours.
  • Thawing by full water immersion at 20 °C ± 5 °C for at least 1 hour.
  • Number of freeze-thaw cycles matches manufacturer's declared freeze-thaw category specified in EN 771-2.
• Damage Evaluation: Visual assessment focusing on loss of flatness, cavities >5 mm, and surface cracking; compressive strength measurement if damage is detected.
• Calculation of Strength Reduction (R): Quantifies the compressive strength loss as a percentage, providing objective data on freeze-thaw effects.
• Reporting Requirements: Comprehensive test report including identification, test conditions, number of cycles, damage description, compressive strength results, and remarks.

Applications

• Masonry Unit Quality Control: Enables manufacturers to certify calcium silicate masonry units meet durability standards associated with freeze-thaw resistance.
• Building Material Specification: Architects and engineers can specify units that comply with EN 772-18 for structures in cold climates to ensure long-term performance.
• Regulatory Compliance and Certification: Laboratories and certification bodies use this test to validate product claims and support building code requirements.
• Product Development and Improvement: Material developers leverage test outcomes to enhance freeze-thaw durability in calcium silicate masonry units.
• Structural Longevity Assurance: Building owners and contractors benefit from using masonry units with proven frost resistance, reducing maintenance costs and increasing safety.

Related Standards

• EN 771-2:2003 - Specification for Calcium Silicate Masonry Units: Defines the product requirements and freeze-thaw categories declared by manufacturers.
• EN 772-1 - Methods of Test for Masonry Units - Determination of Compressive Strength: Specifies how to measure compressive strength, used for evaluating strength loss after freeze-thaw cycling.
• General EN 772 Series - Methods for Testing Masonry Units: Covers various test methods to characterize masonry units’ physical and mechanical properties supporting comprehensive material evaluation.

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Keywords: EN 772-18 standard, calcium silicate masonry units, freeze-thaw resistance test, masonry durability, compressive strength reduction, masonry unit testing, CEN masonry standards, frost resistance masonry, European masonry testing, masonry quality control.

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2011
1DGRPHãþD
SIST EN 772-18:2000
0HWRGHSUHVNXãDQMD]LGDNRYGHO8JRWDYOMDQMH]PU]OLQVNHRGSRUQRVWLDSQHQR
SHãþHQLK]LGDNRY
Methods of test for masonry units - Part 18: Determination of freeze-thaw resistance of
calcium silicate masonry units
Prüfverfahren für Mauersteine - Teil 18: Bestimmung des Frostwiderstandes von
Kalksandsteinen
Méthodes d'essai des éléments de maçonnerie - Partie 18: Détermination de la
résistance au gel/dégel des éléments de maçonnerie en silico-calcaire
Ta slovenski standard je istoveten z: EN 772-18:2011
ICS:
91.100.15 Mineralni materiali in izdelki Mineral materials and
products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 772-18
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2011
ICS 91.100.25 Supersedes EN 772-18:2000
English Version
Methods of test for masonry units - Part 18: Determination of
freeze-thaw resistance of calcium silicate masonry units
Méthodes d'essai des éléments de maçonnerie - Partie 18: Prüfverfahren für Mauersteine - Teil 18: Bestimmung des
Détermination de la résistance au gel/dégel des éléments Frostwiderstandes von Kalksandsteinen
de maçonnerie en silico-calcaire
This European Standard was approved by CEN on 25 December 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-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, 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
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 772-18:2011: 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 .4
6 Sampling .4
6.1 Sampling .4
6.2 Specimens for freeze-thaw testing .4
6.3 Specimens for compressive strength testing.5
7 Procedure .5
8 Evaluation of results .5
9 Test report .6
Annex A (informative) Significant technical changes between this European standard and the
previous edition .7

Foreword
This document (EN 772-18:2011) 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 November 2011, and conflicting national standards shall be withdrawn
at the latest by November 2011.
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 772-18:2000.
Annex A provides details of significant technical changes between this European Standard and the previous
edition.
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 772-18:
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