EN 12370:2020
(Main)Natural stone test methods - Determination of resistance to salt crystallisation
Natural stone test methods - Determination of resistance to salt crystallisation
This document specifies a test method to assess the relative resistance of natural stones with an open porosity of greater than 5 %, measured in accordance with EN 1936, to damage caused by the crystallization of salts. The test is not necessary for low porosity stones.
Prüfverfahren für Naturstein - Bestimmung des Widerstandes gegen Kristallisation von Salzen
Dieses Dokument legt ein Prüfverfahren fest, um die relative Beständigkeit von Natursteinen, deren offene Porosität > 5 % ist, gemessen nach EN 1936 gegen Schäden durch die Kristallisation von Salzen zu bewerten. Das Prüfverfahren ist nicht erforderlich für Naturstein mit einer geringen Porosität.
Méthodes d'essai pour pierres naturelles - Détermination de la résistance à la cristallisation des sels
Le présent document spécifie une méthode d'essai pour évaluer la résistance relative aux altérations causées par la cristallisation des sels des pierres naturelles dont la porosité ouverte, mesurée conformément à l'EN 1936, est supérieure à 5 %. Cet essai n'est pas nécessaire pour les pierres à faible porosité.
Preskušanje naravnega kamna - Ugotavljanje odpornosti proti kristalizaciji soli
General Information
Relations
Overview
EN 12370:2020 - Natural stone test methods: Determination of resistance to salt crystallisation is a CEN standard that specifies a laboratory test to assess the relative resistance of natural stone (with open porosity > 5 %) to damage caused by salt crystallisation. The method uses repeated cycles of immersion in a 14 % sodium sulphate decahydrate solution followed by controlled drying to measure mass change and/or the number of cycles to disintegration. The test is intended for durability assessment of stones exposed to salt weathering and is not required for low-porosity materials.
Key Topics and Requirements
- Scope and applicability: Applies to natural stones whose open porosity is greater than 5 % (open porosity measured per EN 1936). Not intended for low-porosity stones.
- Specimen preparation:
- Minimum six representative specimens (sampling usually by the client).
- Cubes of (40 ± 1) mm sides, wet diamond sawn and ground.
- Wash loose material and dry to constant mass at (105 ± 5) °C.
- Test solution and cycles:
- Use a fresh 14 % sodium sulphate decahydrate solution (density ~1 055 kg/m3 at 20 °C) for each cycle.
- Soak specimens 2 h at (20 ± 0.5) °C, then dry in a ventilated oven with controlled humidity and heat-up to (105 ± 5) °C.
- Repeat the soak/dry cycle 15 times (or until specimen failure).
- Apparatus and controls:
- Ventilated oven capable of (105 ± 5) °C and initial high relative humidity.
- Precision balance (± 0.001 g) and controlled temperature bath/room for soaking.
- Results and reporting:
- Express results as relative mass difference (ΔM) (% mass loss or gain) or number of cycles to failure.
- Record photographic evidence and report specimen details, test conditions, deviations and mean results.
Applications and Users
- Practical uses:
- Durability assessment of natural stone for façades, paving, coastal or de-icing salt exposure, and heritage conservation.
- Material selection for architects, specifiers and engineers when salt weathering is a risk.
- Quality control by quarry operators and stone suppliers.
- Condition evaluation and material selection in building conservation and restoration.
- Typical users:
- Accredited test laboratories, stone producers, architects, civil and structural engineers, conservators, and procurement teams specifying stone products.
Related Standards
- EN 1936 - determination of density and porosity (used to verify applicability)
- EN 12371 - determination of frost resistance (complementary durability test)
- EN 12407 - petrographic examination
- EN 12440 - denomination and commercial naming criteria
EN 12370:2020 should be used as part of a suite of natural stone test methods for a comprehensive assessment of stone durability under environmental and salt exposure conditions.
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN 12370:2000
Preskušanje naravnega kamna - Ugotavljanje odpornosti proti kristalizaciji soli
Natural stone test methods - Determination of resistance to salt crystallisation
Prüfverfahren für Naturstein - Bestimmung des Widerstandes gegen Kristallisation von
Salzen
Méthodes d'essai pour pierres naturelles - Détermination de la résistance à la
cristallisation des sels
Ta slovenski standard je istoveten z: EN 12370:2020
ICS:
73.020 Rudarstvo in kamnolomsko Mining and quarrying
izkopavanje
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.
EN 12370
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2020
EUROPÄISCHE NORM
ICS 73.020; 91.100.15 Supersedes EN 12370:1999
English Version
Natural stone test methods - Determination of resistance
to salt crystallisation
Méthodes d'essai pour pierres naturelles - Prüfverfahren für Naturstein - Bestimmung des
Détermination de la résistance à la cristallisation des Widerstandes gegen Kristallisation von Salzen
sels
This European Standard was approved by CEN on 1 December 2019.
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, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12370:2020 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols . 5
5 Principle . 5
6 Apparatus . 5
7 Preparation of specimens . 6
7.1 Sampling . 6
7.2 Dimensions of test specimens . 6
7.3 Washing . 6
7.4 Drying . 6
8 Procedure. 6
9 Expression of results . 7
10 Test report . 7
Bibliography . 9
European foreword
This document (EN 12370:2020) has been prepared by Technical Committee CEN/TC 246 “Natural
stones”, the secretariat of which is held by UNI.
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 2020, and conflicting national standards shall
be withdrawn at the latest by September 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12370:1999.
The significant changes between this document and the previous edition are listed herewith:
— updating of Clause 8.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
Introduction
This document describes a test designed to assess the salt crystallization resistance of natural stones
where it is relevant. The test cannot be used in isolation and results will be considered with other physical
tests to indicate durability; these include EN 12371 “Determination of frost resistance”.
1 Scope
This document specifies a test method to assess the relative resistance of natural stones with an open
porosity of greater than 5 %, measured in accordance with EN 1936, to damage caused by the
crystal
...
Frequently Asked Questions
EN 12370:2020 is a standard published by the European Committee for Standardization (CEN). Its full title is "Natural stone test methods - Determination of resistance to salt crystallisation". This standard covers: This document specifies a test method to assess the relative resistance of natural stones with an open porosity of greater than 5 %, measured in accordance with EN 1936, to damage caused by the crystallization of salts. The test is not necessary for low porosity stones.
This document specifies a test method to assess the relative resistance of natural stones with an open porosity of greater than 5 %, measured in accordance with EN 1936, to damage caused by the crystallization of salts. The test is not necessary for low porosity stones.
EN 12370:2020 is classified under the following ICS (International Classification for Standards) categories: 73.020 - Mining and quarrying; 91.100.15 - Mineral materials and products. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 12370:2020 has the following relationships with other standards: It is inter standard links to EN 12370:1999. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase EN 12370:2020 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.
The standard EN 12370:2020, titled "Natural stone test methods - Determination of resistance to salt crystallisation," provides a comprehensive framework for assessing the durability of natural stones in contexts where salt crystallization may pose a risk. The primary scope of this standard is to define a specific test method aimed at evaluating the relative resistance of natural stones that exhibit an open porosity greater than 5%. By focusing on stones with higher porosity, the standard identifies a critical subset of materials that are particularly vulnerable to salt-related damage, thus ensuring that relevant and appropriate testing is conducted. One of the strengths of EN 12370:2020 is its precise guidelines on measuring porosity in accordance with EN 1936, which ensures reliable and consistent results across different testing scenarios. This integration of porosity measurement supports the standard's main goal of protecting natural stones from crystallization-induced damage, a concern for construction and restoration projects involving architectural heritage or any outdoor applications. Furthermore, the standard's relevance is amplified by its application in various environmental conditions where salt crystallization is prevalent, such as coastal regions or areas with de-icing salts. By standardizing this testing method, EN 12370:2020 not only aids manufacturers and suppliers in assessing their products but also provides architects, engineers, and conservationists with essential data for making informed decisions about material selection. The document establishes a necessary protocol to bridge the gap between natural stone properties and the challenges posed by environmental factors, thereby emphasizing the importance of durability in stone materials. Overall, EN 12370:2020 stands as a vital resource in the field of natural stone testing, promoting best practices that enhance the longevity and performance of this aesthetically and culturally significant material.
La norme SIST EN 12370:2020 établit des méthodes d'évaluation de la résistance des pierres naturelles à la cristallisation des sels, représentant un outil essentiel pour les acteurs du secteur. Elle s'applique spécifiquement aux pierres naturelles ayant une porosité ouverte supérieure à 5 %, mesurée conformément à la norme EN 1936. L'un des points forts de cette norme est sa capacité à fournir une méthode d'essai standardisée, garantissant une approche cohérente pour évaluer la durabilité des pierres naturelles dans des environnements exposés aux sels. Cela est particulièrement pertinent pour les applications extérieures, où les conditions climatiques peuvent entraîner des dommages significatifs dus à la cristallisation des sels. De plus, cette norme joue un rôle crucial dans la préservation de la qualité des matériaux utilisés dans la construction et la restauration. En écartant les pierres à faible porosité de ce test, la norme souligne une approche pragmatique, centrée sur les matériaux susceptibles de rencontrer des problèmes de cristallisation. Cela permet d'optimiser les ressources en se concentrant sur les pierres à risque tout en garantissant la pérennité des structures en pierre. Dans un contexte de durabilité et de respect des matériaux naturels, la norme SIST EN 12370:2020 se révèle d'une grande pertinence, offrant des solutions pratiques et des directives claires pour les professionnels du secteur de la pierre. Sa mise en œuvre peut donc contribuer à la certification de la résistance des pierres naturelles, assurant une meilleure confiance dans les matériaux utilisés.
SIST EN 12370:2020は、塩の結晶化による自然石の耐久性を評価するための試験方法を規定した重要な標準文書です。この標準の範囲は、開放多孔性が5％を超える自然石に対するものであり、EN 1936に従って測定された値を基にしています。この定義により、低多孔性石材には試験が不要であることが明確にされています。 この標準の強みは、自然石の塩結晶化に対する耐性を科学的に評価する手法を提供している点にあります。石材業界では、耐久性が求められるため、特に塩分の影響を受けやすい地域で使用される石材の選定において、EN 12370:2020の指針は非常に重要です。また、規格に記載された試験方法も詳細に説明されており、実施モードが明確になっています。これにより、業界の専門家は同じ基準に基づいて評価を行うことができ、一貫性を保った品質管理が可能となります。 さらに、この文書は天然石の保存や利用に対する信頼性を高める役割も果たします。自然石を使用する建築やインフラプロジェクトにおいて、その耐塩性に関する客観的な指標を提供することで、施主や設計者にとって価値のある情報をもたらします。したがって、SIST EN 12370:2020は、石材の耐久性に関心のあるすべての関係者にとって、非常に関連性の高い標準であると言えます。
SIST EN 12370:2020 표준은 자연석의 염분 결정화에 대한 저항성을 평가하는 시험 방법을 명시하고 있습니다. 이 문서는 공극률이 5% 이상인 자연석의 상대 저항성을 측정하는 데 중점을 두고 있으며, EN 1936에 따라 공정하게 평가됩니다. 이러한 표준은 저공극 자연석에 대한 시험이 불필요하다는 점에서 특정 적용 범위를 정의하고 있습니다. 이 표준의 강점은 자연석의 내구성을 과학적으로 평가할 수 있는 체계적인 방법론을 제공한다는 것입니다. 염분 결정화는 자연석의 손상을 일으킬 수 있는 주요 요인 중 하나로, 이 표준을 통해 검사된 stone의 내구성은 건축 및 조경 영역에서 중요한 데이터로 활용될 수 있습니다. 결과적으로, EN 12370:2020 표준은 자연석의 물리적 특성과 내환경 내에서의 성능을 이해하는 데 매우 중요한 역할을 하며, 관련 업계에서 이 문서의 필요성과 중요성이 점차 증가하고 있습니다. 표준의 적용은 고품질 자연석 사용을 지향하는 모든 프로젝트에서 필수적으로 고려되어야 하며, 이는 장기적인 내구성 확보와 직결됩니다. SIST EN 12370:2020은 자연석 테스트 방법에 관한 최신 지침을 제공하므로, 관련 전문가들은 이를 통해 품질 관리 및 성능 평가를 강화하고, 궁극적으로 산업 전반의 신뢰도를 높일 수 있을 것입니다.
Die Norm EN 12370:2020, tituliert „Prüfmethoden für Natursteine - Bestimmung der Widerstandsfähigkeit gegen Salzkrystallisation“, bietet eine fundierte Vorgehensweise zur Bewertung der Widerstandsfähigkeit von Natursteinen mit einer offenen Porosität von mehr als 5 %. Durch die in der Norm festgelegte Prüfmethodik wird eine detaillierte Analyse der Auswirkungen der Salzkrystallisation auf die strukturelle Integrität dieser Materialien ermöglicht. Ein wesentlicher Stärke dieser Norm liegt in der klaren Definition und Vorgehensweise zur Testsituation, die sicherstellt, dass die Ergebnisse konsistent und reproduzierbar sind. Die Anforderung, die offene Porosität gemäß EN 1936 zu messen, trägt zur Genauigkeit der Beurteilung bei und erlaubt eine differenzierte Analyse zwischen Materialien mit hohem und niedrigem Porositätsgrad. Die Norm ist besonders relevant für die Bau- und Architekturbranche, wo die Auswahl von Natursteinen für Fassaden und andere sichtbare Elemente eine dauerhafte Ästhetik und strukturelle Belastbarkeit erfordert. Darüber hinaus fördert die EN 12370:2020 ein besseres Verständnis der physikalischen Eigenschaften von Natursteinen und deren Verhalten unter Umwelteinflüssen. Diese Erkenntnisse können unmittelbar in die Planung und Auswahl von Materialien einfließen, was zu einer nachhaltigeren und effektiveren Nutzung von Natursteinen führt. Somit ist die Norm nicht nur eine technische Spezifikation, sondern auch ein wichtiges Werkzeug für Architekten, Ingenieure und Bauherren, die sich mit den Herausforderungen der Materialbeständigkeit in verschiedenen Klimazonen auseinandersetzen müssen.
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