EN 772-5:2016
(Main)Methods of test for masonry units - Part 5: Determination of the active soluble salts content of clay masonry units
Methods of test for masonry units - Part 5: Determination of the active soluble salts content of clay masonry units
This European Standard specifies a method for determining the active soluble salts content of clay masonry units.
Prüfverfahren für Mauersteine - Teil 5: Bestimmung des Gehalts an aktiven löslichen Salzen von Mauerziegeln
Diese Europäische Norm legt ein Verfahren zur Bestimmung des Gehalts an aktiven löslichen Salzen von Mauerziegeln fest.
Méthodes d'essai des éléments de maçonnerie - Partie 5: Détermination de la teneur en sels solubles actifs des éléments de maçonnerie en terre cuite
La présente Norme européenne spécifie une méthode de détermination de la teneur en sels solubles actifs des éléments de maçonnerie en terre cuite.
Metode preskušanja zidakov - 5. del: Določevanje vodotopnih soli v opečnih zidakih
Ta evropski standard določa metodo za določevanje vodotopnih soli v opečnih zidakih.
General Information
- Status
- Published
- Publication Date
- 01-Mar-2016
- Technical Committee
- CEN/TC 125 - Masonry
- Drafting Committee
- CEN/TC 125/WG 4 - Test methods
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 03-Sep-2021
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 09-Jul-2014
- Effective Date
- 28-Dec-2016
Overview
EN 772-5:2016 - Methods of test for masonry units, Part 5 - specifies a standardized laboratory procedure to determine the active soluble salts content of clay masonry units. Published by CEN in March 2016 (superseding EN 772-5:2001), this European Standard defines sampling, sample preparation, water extraction and analytical determination of the soluble magnesium (Mg), sodium (Na) and potassium (K) ions released from fired clay (terracotta) units under test conditions. These ions are classed as “active” salts in EN 771‑1 and can be correlated with potential deleterious effects on cementitious mortars or the units themselves.
Key topics and requirements
- Scope and purpose: Quantify active soluble salts in clay masonry units to assess potential salt-related damage.
- Sampling: Minimum of six whole units (or more if product spec requires) with care to avoid prior leaching.
- Sample preparation:
- Produce representative subsample (50–250 g) ground to pass a 150 µm test sieve.
- Crushing stages: lumps ≤10 mm, then ≤1 mm, drying to constant mass at (105 ± 5) °C, final grinding to 95% passing 150 µm.
- Extraction procedure:
- Weigh 20.00 g ± 0.05 g of prepared sample and add 200 ml distilled/deionized water.
- Shake for 60 min (horizontal shaker or rotary shaker as specified).
- Filter (or centrifuge) within 15 min; filtrate must be clear.
- Analytical methods:
- Instrumental: Atomic Absorption Spectroscopy (AAS), Flame Photometry, or Inductively Coupled Plasma (ICP) spectrometry (sample prep and calibration procedures provided).
- Alternative: EDTA titration for magnesium, with procedures for Na/K determination also included.
- Calculation and reporting: Calibration-based quantification, expression of results as percentage of original mass, and required test-report content.
Practical applications
- Quality control and factory production testing of clay masonry units (bricks, terracotta).
- Pre-specification testing to limit salt-related durability issues in masonry construction.
- Forensic and failure analysis where efflorescence, mortar-adhesion loss, or salt crystallization is suspected.
- Regulatory or certification testing where compliance with EN product standards is required.
Who uses this standard
- Product manufacturers and QC laboratories
- Construction materials testing labs
- Architects, structural and materials engineers specifying masonry
- Standards bodies, certification agencies and procurement teams
Related standards
- EN 771-1 (Specification for clay masonry units) - defines “active soluble salts”
- ISO 3310-1 / ISO 3310-2 (Test sieves) - sieve requirements used in sample preparation
Keywords: EN 772-5:2016, active soluble salts, clay masonry units, test method, AAS, ICP, EDTA titration, extraction, masonry testing, standards.
Frequently Asked Questions
EN 772-5:2016 is a standard published by the European Committee for Standardization (CEN). Its full title is "Methods of test for masonry units - Part 5: Determination of the active soluble salts content of clay masonry units". This standard covers: This European Standard specifies a method for determining the active soluble salts content of clay masonry units.
This European Standard specifies a method for determining the active soluble salts content of clay masonry units.
EN 772-5:2016 is classified under the following ICS (International Classification for Standards) categories: 91.100.25 - Terracotta building products. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 772-5:2016 has the following relationships with other standards: It is inter standard links to EN 772-5:2001, EN 772-5:2016/AC:2017. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 772-5:2016 is associated with the following European legislation: EU Directives/Regulations: 305/2011; Standardization Mandates: M/116. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase EN 772-5:2016 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2016
1DGRPHãþD
SIST EN 772-5:2002
0HWRGHSUHVNXãDQMD]LGDNRYGHO 'RORþHYDQMHYRGRWRSQLKVROLYRSHþQLK
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Methods of test for masonry units - Part 5: Determination of the active soluble salts
content of clay masonry units
Prüfverfahren für Mauersteine - Teil 5: Bestimmung des Gehalts an aktiven löslichen
Salzen von Mauerziegeln
Méthodes d'essai des éléments de maçonnerie - Partie 5: Détermination de la teneur en
sels solubles actifs des éléments de maçonnerie en terre cuite
Ta slovenski standard je istoveten z: EN 772-5:2016
ICS:
91.100.25 Gradbeni izdelki iz terakote Terracotta building products
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 772-5
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2016
EUROPÄISCHE NORM
ICS 91.100.25 Supersedes EN 772-5:2001
English Version
Methods of test for masonry units - Part 5: Determination
of the active soluble salts content of clay masonry units
Méthodes d'essai des éléments de maçonnerie - Partie Prüfverfahren für Mauersteine - Teil 5: Bestimmung
5: Détermination de la teneur en sels solubles actifs des des Gehalts an aktiven löslichen Salzen von
éléments de maçonnerie en terre cuite Mauerziegeln
This European Standard was approved by CEN on 3 January 2016.
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
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 772-5:2016 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Principle . 4
4 Symbols . 4
5 Materials . 4
5.1 For all methods . 4
5.2 Instrumental method Atomic Absorption Spectroscopy (AAS) and flame photometry . 5
5.3 Instrumental method Atomic Absorption Spectroscopy (AAS) and flame photometry
or inductively coupled plasma spectrometry (ICP) . 5
5.4 EDTA method (alternative) . 5
6 Apparatus . 5
7 Preparation of sample . 6
7.1 Sampling . 6
7.2 Crushing . 6
8 Extraction procedure . 6
9 Determinations of cations by instrumental techniques . 6
9.1 General . 6
9.2 Atomic absorption spectroscopy method (AAS) and flame photometry . 6
9.2.1 Sample preparation . 6
9.2.2 Calibration: preparation of the reference series . 7
9.2.3 Spectroscopic lines and parameters for AAS and flame photometry analysis . 7
9.3 Inductively coupled plasma spectrometry method (ICP) . 8
9.3.1 General . 8
9.3.2 Spectroscopic lines for ICP analysis . 8
9.4 Calculation of the results . 8
10 Alternative method of determination of the content of active soluble salts . 9
10.1 Preparations of reagents for magnesium determination . 9
10.1.1 Magnesium test solution (1,0 mg Mg/ml) . 9
10.1.2 Preparation of EDTA test solution (0,5 %) . 9
10.2 First titration (calcium plus magnesium) . 9
10.3 Second titration (calcium) . 9
10.4 Magnesium content . 9
10.5 Determination of sodium and potassium . 9
11 Expression of results . 10
12 Test report . 10
European foreword
This document (EN 772-5:2016) 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 September 2016, and conflicting national standards
shall be withdrawn at the latest by December 2017.
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 772-5:2001.
The crushing procedure in 7.2 has been amended so that the sample, after reducing to particles of not
greater than approximately 1 mm in size, is dried in a ventilated oven to constant mass prior to further
grinding and sieving.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association.
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, 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 the United Kingdom.
1 Scope
This European Standard specifies a method for determining the active soluble salts content of clay
masonry units.
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 771-1, Specification for masonry units — Part 1: Clay masonry units
ISO 3310-1, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth
ISO 3310-2, Test sieves — Technical requirements and testing — Part 2: Test sieves of perforated metal
plate
3 Principle
The method adopted is based on water extraction from a crushed representative sample of the clay
masonry units, and determines the amounts of soluble magnesium, sodium and potassium ions,
released under the test conditions, which may be correlated with the potentially damaging effect of
salts of those ions on cementitious mortars in certain circumstances, or even on the units themselves.
These salts are known as «active» soluble salts in EN 771-1.
4 Symbols
M is the number of milligrams of Mg equivalent to 1 ml of EDTA
Mg
x,y is the volume of EDTA titrated, en millilitres (ml)
C is the lower reference sample concentration, in percentage (%)
C is the higher reference sample, concentration, in percentage (%)
C is the sample concentration, in percentage (%)
x
E is the measured signal for the lower reference sample concentration C
1 1
E is the measured signal for the higher reference sample, concentration C
2 2
E is the measured signal for sample
x
d is the dilution factor
5 Materials
5.1 For all methods
Distilled or deionized water for extraction of active soluble salts from the sample, and for preparation of
analytical test solutions.
Hydrochloric acid (relative density 1,18).
All chemicals shall be of analytical reagent grade.
5.2 Instrumental method Atomic Absorption Spectroscopy (AAS) and flame photometry
Hydrated Lanthanum chloride LaCL ∙ 7H O, 210 g/l Solution
3 2
Caesium Chloride C
...
SIST EN 772-5:2016 문서는 점토 조적 유닛의 활성 용해 염분 함량을 측정하는 방법을 규정한 유럽 표준입니다. 이 표준은 조적 기술 및 건축 분야에서 중요한 역할을 하는데, 점토 조적 유닛의 품질과 내구성을 평가하는 데 필요한 필수 정보를 제공합니다. 이 표준의 강점은 명확하고 구체적인 절차를 통해 점토 조적 유닛 내의 활성 용해 염분 함량을 정확하게 측정할 수 있다는 것입니다. 이를 통해 건축물의 신뢰성과 내구성을 높이고, 염분으로 인한 문제를 예방할 수 있습니다. 표준은 다양한 테스트 조건에 대한 명확한 지침을 제공하여, 일관된 결과를 도출할 수 있도록 지원합니다. SIST EN 772-5:2016의 적용 가능성은 매우 넓습니다. 건축 자재의 품질 보증 및 규제 준수를 위해 건축 업계에서 요구하는 기준으로, 특히 점토 기반의 조적 제품을 사용하는 프로젝트에 매우 적합합니다. 이 표준은 신뢰할 수 있는 테스트 결과를 제공함으로써, 건축물의 구조적 안정성을 보장하고, 장기적인 성능을 담보합니다. 결론적으로, SIST EN 772-5:2016은 조적 유닛의 활성 용해 염분 함량 측정에 필수적인 표준이며, 현대 건축 환경에서 그 중요성이 더욱 부각되고 있습니다.
The standard EN 772-5:2016 provides a comprehensive framework for assessing the active soluble salts content in clay masonry units, which is crucial for ensuring the longevity and performance of masonry structures. This document is essential for construction professionals, as excessive soluble salts can lead to efflorescence and deterioration of masonry materials, adversely affecting both aesthetic and structural aspects. One of the significant strengths of the EN 772-5:2016 standard is its clarity in methodology, which allows for consistent testing across various laboratories and projects. By providing a standardized approach, it enhances the reliability of results, thereby facilitating better comparison and analysis of materials. The inclusion of detailed procedures ensures that practitioners can accurately assess the soluble salts content, which is particularly relevant in areas where clay masonry units are prevalent. Furthermore, the standard’s emphasis on the determination of the active soluble salts content underscores its importance in the industry. The inclusion of guidelines that relate directly to building performance aids architects, engineers, and contractors in making informed material selections, potentially preventing costly repairs in the future. EN 772-5:2016 is also timely and relevant in the context of increasing environmental regulations and sustainability considerations in construction practices. Understanding the chemical properties of clay masonry units helps in promoting best practices that align with environmental standards and contribute to more sustainable building processes. In conclusion, EN 772-5:2016 serves as a vital tool for the construction industry, ensuring that the quality of clay masonry units meets both functional and aesthetic requirements while addressing the challenges posed by soluble salts. Its comprehensive and standardized approach makes it an invaluable resource for professionals seeking to enhance the durability and performance of masonry works.
SIST EN 772-5:2016 は、粘土製の組積造ユニットにおける活性可溶塩分の含有量を測定する方法を規定しているヨーロッパ規格です。この標準は、組積造の品質を保証するために重要な役割を果たしており、特に建材としての粘土ユニットの特性を明確に理解するのに必要です。 この標準の強みは、試験方法が明確であり、再現性が高い点にあります。これにより、異なる製造ロット間で結果の一貫性が保たれ、メーカーは安定した品質を提供できるようになります。また、活性可溶塩が建材に与える影響を適切に評価できるため、長期的な耐久性や使用時の安全性を考慮する上でも極めて重要です。 さらに、SIST EN 772-5:2016 は、建材業界における国際的な基準と整合性を持たせることができるため、特に輸出入を行う企業にとってもメリットがあります。このように、標準の適用は、業界全体の信頼性を高め、消費者に対する透明性の向上にも寄与します。 全体として、SIST EN 772-5:2016は、粘土製組積造ユニットの製造業者にとって必須の規範であり、その規定する試験方法は、品質管理の一環として多くの場面で活用されることが期待されます。
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