EN 1427:2015
(Main)Bitumen and bituminous binders - Determination of the softening point - Ring and Ball method
Bitumen and bituminous binders - Determination of the softening point - Ring and Ball method
This European Standard specifies a method for the determination of the softening point of bitumen and bituminous binders in the range of 28 °C to 150 °C.
Technical warning - The change from mercury thermometers to electronic temperature devices has revealed that the temperature definition in the mercury thermometer has not been precise enough to make a correct, unbiased transfer to electronic devices. Care should be taken for softening points ring and ball above 100 °C as the condition may have changed from previous practise to present days testing equipment. Below approx. 100 °C the difference in temperature readings between electronic and mercury stem thermometer is acceptable compared to the repeatability of this test methods. [Reference: ASTM E20 Group]
NOTE The method described is also applicable to bituminous binders that have been recovered from bituminous mixes, e.g. by extraction.
WARNING — Use of this European Standard can involve hazardous materials, operations and equipment. This European Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this European Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Bitumen und bitumenhaltige Bindemittel - Bestimmung des Erweichungspunktes - Ring- und Kugel-Verfahren
Diese Europäische Norm legt ein Verfahren zur Bestimmung des Erweichungspunktes von Bitumen und bitumenhaltigen Bindemitteln im Bereich von 28 °C bis 150 °C fest.
TECHNISCHE WARNUNG - Der Wechsel von Quecksilberthermometern hin zu elektronischen Temperaturmessgeräten hat gezeigt, dass die Temperaturbeschreibung beim Quecksilberthermometer nicht präzise genug war, um einen korrekten, unvoreingenommenen Wechsel zu elektronischen Geräten vorzunehmen. Aufmerksamkeit ist bei Erweichungspunkten Ring und Kugel über 100 °C geboten, da sich die Bedingung früherer Praktiken gegenüber aktuellen Prüfvorrichtungen geändert haben kann. Unter ca. 100 °C ist der Unterschied der Temperaturanzeige zwischen elektronischen und Quecksilberthermometern im Vergleich zur Wiederholpräzision dieses Prüfverfahrens zulässig. [Verweis: ASTM E20 Gruppe]
ANMERKUNG Das beschriebene Verfahren ist auch auf bitumenhaltige Bindemittel anwendbar, die aus bitumenhaltigen Gemischen, z. B. durch Extraktion, zurückgewonnen wurden.
WARNUNG - Die Anwendung dieser Europäischen Norm kann den Umgang mit gefährlichen Substanzen und Ausrüstungsteilen und die Ausführung gefährlicher Arbeitsgänge einschließen. Diese Europäische Norm erhebt nicht den Anspruch, alle mit ihrer Anwendung verbundenen Sicherheitsprobleme anzusprechen. Es liegt in der Verantwortung des Anwenders dieser Europäischen Norm, geeignete Verhaltensregeln für den Arbeits- und Gesundheitsschutz festzulegen und vor der Anwendung zu klären, ob einschränkende Vorschriften zu berücksichtigen sind.
Bitumes et liants bitumineux - Détermination du point de ramollissement - Méthode Bille et Anneau
La présente Norme européenne définit une méthode de détermination du point de ramollissement des bitumes et des liants bitumineux, dans la plage des températures de 28 °C à 150 °C.
Avertissement technique – Le changement des thermomètres à mercure pour des dispositifs électroniques de mesure de la température a mis en évidence que la définition des thermomètres à mercure n’est pas suffisamment précise pour faire un transfert correct, sans biais vers ces dispositifs électroniques. Il est recommandé de veiller aux points de ramollissement bille et anneau supérieurs à 100 °C du fait de changement entre les pratiques précédentes et celles des équipements d’essai actuels. En dessous de 100 °C environ, la différence entre les températures lues avec les dispositifs électroniques et les thermomètres à mercure est acceptable au regard de la répétabilité de cette méthode d’essai [Reference: ASTM E20 Group].
NOTE Cette méthode peut également s’appliquer aux liants bitumineux récupérés, par exemple ceux extraits d’enrobés bitumineux.
AVERTISSEMENT — L’utilisation de la présente Norme européenne peut impliquer le recours à des produits, des opérations et des équipements à caractères dangereux. La présente Norme européenne n’est pas censée aborder tous les problèmes de sécurité concernés par son usage. Il est de la responsabilité de l’utilisateur de consulter et d’établir des règles de sécurité et d’hygiène appropriées et de déterminer l’applicabilité des restrictions réglementaires avant utilisation.
Bitumen in bitumenska veziva - Določanje zmehčišča - Metoda prstana in kroglice
Ta evropski standard določa metodo za določanje zmehčišča bitumnov in bitumenskih veziv pri temperaturi 28–150 °C.
OPOMBA: Opisana metoda se uporablja tudi za bitumenska veziva, ki so bila pridobljena iz bitumenskih zmesi, npr. z ekstrakcijo.
OPOZORILO: Pri uporabi tega evropskega standarda so lahko prisotni nevarni materiali, postopki in oprema. Ta evropski standard ne obravnava vseh varnostnih težav, ki se nanašajo na njegovo uporabo. Za vzpostavitev ustreznih varnostnih in zdravstvenih praks ter za določitev uporabnosti regulativnih omejitev pred uporabo je odgovoren uporabnik tega evropskega standarda.
General Information
- Status
- Published
- Publication Date
- 30-Jun-2015
- Withdrawal Date
- 30-Jan-2016
- Technical Committee
- CEN/TC 336 - Bituminous binders
- Drafting Committee
- CEN/TC 336/WG 1 - Bituminous binders for paving
- Current Stage
- 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
- Start Date
- 19-Nov-2020
- Completion Date
- 14-Apr-2025
Relations
- Effective Date
- 08-Jul-2015
Overview
EN 1427:2015 - published by CEN - defines the Ring and Ball method for determining the softening point of bitumen and bituminous binders in the range 28 °C to 150 °C. The softening point is the temperature at which a sample, under standardized conditions, attains a specified consistency. The method applies to virgin binders and binders recovered from mixes.
Key topics and technical requirements
- Principle: Two horizontal discs of binder are cast in brass rings; each supports a steel ball. The bath is heated at a controlled rate and the softening point is the mean temperature when each ball falls 25.0 ± 0.4 mm.
- Apparatus: square-shouldered brass rings, pouring plate, stainless-steel balls (diameter 9.50 ± 0.05 mm, mass 3.50 ± 0.05 g), ball guides, ring holder, beaker-type bath and stirrer; automatic/semi-automatic equipment is permitted if calibrated.
- Bath liquids:
- Water for softening points 28–80 °C (initial bath 5 ± 1 °C).
- Glycerol for >80 °C up to 150 °C (initial bath 30 ± 1 °C). Glycerol must meet density and purity requirements.
- Temperature measurement:
- For water tests: sensor range ~0–90 °C, readable to 0.2 °C, accuracy ≤0.3 °C.
- For glycerol tests: range ~30–155 °C, readable to 0.5 °C, accuracy ≤0.3 °C.
- Solid stem mercury thermometers are allowed only where national rules permit; attention is required when converting from mercury to electronic devices - especially above 100 °C (possible systematic differences).
- Sampling & preparation: follows EN 58 and EN 12594; samples must be cast, cooled and trimmed within specified times to avoid bias.
- Calibration & verification: equipment calibration/verification at least annually; thermal response of sensors should be comparable to historical references.
- Safety: standard warns of hazardous materials and operations (e.g., glycerol flash/splash risk above 100 °C) and requires appropriate lab safety practices.
Applications and users
Who uses EN 1427:2015:
- Asphalt and binder manufacturers for quality control and product specification.
- Construction and road authorities for acceptance testing of binders.
- Testing laboratories (commercial, contract, research) performing binder characterization.
- Material engineers and R&D teams assessing modified bitumens or binders recovered from mixes.
Practical uses:
- Routine QC to monitor binder consistency and temperature susceptibility.
- Comparative testing of formulations (e.g., polymer-modified binders).
- Contract compliance and specification verification for paving and roofing materials.
Related standards
- EN 58 - Sampling bituminous binders
- EN 12594 - Preparation of test samples
- EN 12597 - Terminology for bitumen and binders
- EN ISO 3696 - Water for laboratory use
EN 1427:2015 is essential for reliable, standardized softening point measurements (Ring and Ball method) and for ensuring test comparability across laboratories and projects.
Frequently Asked Questions
EN 1427:2015 is a standard published by the European Committee for Standardization (CEN). Its full title is "Bitumen and bituminous binders - Determination of the softening point - Ring and Ball method". This standard covers: This European Standard specifies a method for the determination of the softening point of bitumen and bituminous binders in the range of 28 °C to 150 °C. Technical warning - The change from mercury thermometers to electronic temperature devices has revealed that the temperature definition in the mercury thermometer has not been precise enough to make a correct, unbiased transfer to electronic devices. Care should be taken for softening points ring and ball above 100 °C as the condition may have changed from previous practise to present days testing equipment. Below approx. 100 °C the difference in temperature readings between electronic and mercury stem thermometer is acceptable compared to the repeatability of this test methods. [Reference: ASTM E20 Group] NOTE The method described is also applicable to bituminous binders that have been recovered from bituminous mixes, e.g. by extraction. WARNING — Use of this European Standard can involve hazardous materials, operations and equipment. This European Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this European Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This European Standard specifies a method for the determination of the softening point of bitumen and bituminous binders in the range of 28 °C to 150 °C. Technical warning - The change from mercury thermometers to electronic temperature devices has revealed that the temperature definition in the mercury thermometer has not been precise enough to make a correct, unbiased transfer to electronic devices. Care should be taken for softening points ring and ball above 100 °C as the condition may have changed from previous practise to present days testing equipment. Below approx. 100 °C the difference in temperature readings between electronic and mercury stem thermometer is acceptable compared to the repeatability of this test methods. [Reference: ASTM E20 Group] NOTE The method described is also applicable to bituminous binders that have been recovered from bituminous mixes, e.g. by extraction. WARNING — Use of this European Standard can involve hazardous materials, operations and equipment. This European Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this European Standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
EN 1427:2015 is classified under the following ICS (International Classification for Standards) categories: 75.140 - Waxes, bituminous materials and other petroleum products; 91.100.50 - Binders. Sealing materials. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 1427:2015 has the following relationships with other standards: It is inter standard links to EN 1427:2007. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bitumen und bitumenhaltige Bindemittel - Bestimmung des Erweichungspunktes - Ring- und Kugel-VerfahrenBitumes et liants bitumineux - Détermination du point de ramollissement - Méthode Bille et AnneauBitumen and bituminous binders - Determination of the softening point - Ring and Ball method91.100.50Veziva. Tesnilni materialiBinders. Sealing materials75.140Voski, bitumni in drugi naftni proizvodiWaxes, bituminous materials and other petroleum productsICS:Ta slovenski standard je istoveten z:EN 1427:2015SIST EN 1427:2015en,fr,de01-oktober-2015SIST EN 1427:2015SLOVENSKI
STANDARDSIST EN 1427:20071DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1427
July 2015 ICS 91.100.50; 75.140 Supersedes EN 1427:2007English Version
Bitumen and bituminous binders - Determination of the softening point - Ring and Ball method
Bitumes et liants bitumineux - Détermination du point de ramollissement - Méthode Bille et Anneau
Bitumen und bitumenhaltige Bindemittel - Bestimmung des Erweichungspunktes - Ring- und Kugel-Verfahren This European Standard was approved by CEN on 27 May 2015.
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 © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1427:2015 ESIST EN 1427:2015
Characteristics of thermometers . 14 Annex B (informative)
Examples of valid and invalid temperature gradients . 15 B.1 Examples . 15 B.1.1 General . 15 B.1.2 Example 1 Bath liquid: Water . 15 B.1.3 Example 2 Bath liquid: Glycerol . 16 Bibliography . 18
A temperature measuring device (combining sensor and reading unit) shall for determination in water: SIST EN 1427:2015
...
SIST EN 1427:2015 표준은 비트umen 및 비트uminous 바인더의 연화점을 측정하기 위한 리용과 볼(Ring and Ball) 방법을 지정합니다. 이 표준의 적용 범위에는 28 °C에서 150 °C 사이의 연화점 측정이 포함되며, 이는 비트uminous 바인더의 특성을 평가하는 데 중요한 기준을 제공합니다. 이 표준의 강점 중 하나는 명확한 테스트 방법을 제시함으로써 다양한 비트uminous 바인더의 연화점을 일관되게 비교하고 분석할 수 있도록 한다는 점입니다. 연화점 측정은 도로 포장, 건설 자재 등의 품질 관리를 위해 필수적이며, SIST EN 1427:2015 표준은 이를 위한 믿을 만한 기초를 제공합니다. 또한, 시험 기구와 장비에 대한 기술 경고도 포함되어 있어, 사용자는 수은 온도계에서 전자온도계로의 변경으로 인한 정확성 문제를 인식하게 됩니다. 특히, 100 °C 이상의 연화점 측정 시 주의가 필요하다는 점은, 새로운 시험 장비에 맞춰 안전한 테스트 환경을 조성하는 데 도움을 줍니다. 100 °C 이하에서는 온도 측정의 차이가 허용 가능한 수준이라는 점에서, 이 표준은 실무에서의 적용 가능성을 고려한 실용적인 지침을 제공합니다. 또한, 이 표준은 비트uminous 혼합물에서 회수된 바인더에도 적용 가능함을 시사하여, 테스트가 다양한 상황에서도 일관되게 수행될 수 있음을 나타냅니다. 그러나 사용자는 이 표준의 사용이 관련된 위험물질 및 작동과 장비에 대한 주의가 필요하다는 점을 명심해야 하며, 안전 및 건강 관행을 수립하는 것은 전적으로 사용자에게 맡겨져 있습니다. 결론적으로, SIST EN 1427:2015 표준은 비트uminous 바인더의 특성 파악을 위한 신뢰할 수 있는 측정 방법을 제공하고, 다양한 산업 환경에서의 적용 가능성을 확보하고 있어, 필수적인 기술 문서로 자리매김하고 있습니다.
The EN 1427:2015 standard provides a clear and structured methodology for determining the softening point of bitumen and bituminous binders using the Ring and Ball method, covering a temperature range from 28 °C to 150 °C. This scope is particularly relevant for industries involved in road construction and maintenance, as understanding the softening point is critical for assessing the performance characteristics of bituminous materials under different temperature conditions. One of the strengths of this standard is its comprehensive approach to the subject. It not only defines the testing procedure but also addresses the transition from traditional mercury thermometers to modern electronic temperature devices. This aspect is essential given the observed discrepancies in temperature readings, particularly above 100 °C. By providing this technical warning, the standard emphasizes the importance of accuracy and the potential implications of using outdated equipment, ensuring that users are aware of the necessary adjustments in their testing protocols to achieve reliable results. Moreover, the EN 1427:2015 standard is inclusive of bituminous binders recovered from bituminous mixes, enhancing its applicability and relevance in practical scenarios where materials may be recycled or reused. This extension fosters a broader understanding of material properties in the context of sustainability in construction practices. The standard also highlights the user’s responsibility regarding safety and health practices when working with hazardous materials and equipment, which is a crucial consideration in any laboratory or field setting. By noting that it does not cover all safety issues, it encourages practitioners to conduct thorough risk assessments, ultimately promoting safer working environments. In summary, the EN 1427:2015 standard is a robust document that provides essential guidance for the testing of bitumen and bituminous binders. Its strengths lie in the clarity of its methodology, the consideration of modern measurement techniques, the inclusion of recycled materials, and the focus on user safety, making it a vital reference for professionals in the industry.
EN 1427:2015は、ビチューメンとビチューメニウスバインダーの軟化点を測定するためのリングとボール法を規定した欧州規格です。このスタンダードは、28℃から150℃の範囲でビチューメンの特性を評価する方法を明確に定義しています。 この規格の強みは、その明確な範囲設定と、電子温度計を用いた最新の測定技術への対応にあります。特に、100℃以上の軟化点については、従来の水銀温度計からの移行に伴う精度の問題に配慮した警告があり、ユーザーに対して安全かつ正確な測定方法が求められています。また、ビチューメニウスバインダーの回収後にも適用可能であり、柔軟性のある測定手法を提供しています。 EN 1427:2015は、ビチューメン業界における品質管理に必須の基準であり、適切な評価を通じて製品の信頼性を向上させることができます。この標準の遵守は、ビチューメンとビチューメニウスバインダーの特性理解を深めるだけでなく、業界全体の安全性や効率性を促進するための重要なステップです。
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