EN 447:2007
(Main)Grout for prestressing tendons - Basic requirements
Grout for prestressing tendons - Basic requirements
This European Standard covers the materials that may be used in the manufacture of cement grouts and the required properties and composition of the grout. It is applicable to grouting of tendons in all types of structures including bridges and buildings.
Einpressmörtel für Spannglieder - Allgemeine Anforderungen
Die vorliegende Europäische Norm beschreibt die Ausgangsstoffe, die für die Herstellung von Einpressmörteln verwendet werden dürfen, sowie die erforderlichen Eigenschaften und Zusammensetzung des Einpressmörtels. Sie gilt für das Verpressen von Spanngliedern in allen Arten von Bauwerken einschließlich Brücken und Gebäuden.
Coulis pour câble de précontrainte - Prescriptions pour les coulis courants
La présente Norme européenne s'applique aux matériaux qui peuvent être utilisés dans la fabrication des coulis de ciment ainsi qu'aux propriétés et composition requises du coulis. Elle s'applique à l'injection de coulis dans les câbles dans tous les types de structures, y compris les ponts et les bâtiments.
Injekcijska masa za prednapete kable - Osnovne zahteve
General Information
- Status
- Published
- Publication Date
- 02-Oct-2007
- Technical Committee
- CEN/TC 104 - Concrete ( performance, production, placing and compliance criteria )
- Drafting Committee
- CEN/TC 104/SC 2 - Execution of concrete structures
- Current Stage
- 9093 - Decision to confirm - Review Enquiry
- Start Date
- 24-Jun-2025
- Completion Date
- 23-Sep-2025
Relations
- Effective Date
- 22-Dec-2008
Overview
EN 447:2007 - Grout for prestressing tendons: Basic requirements is a CEN European Standard that sets out the essential materials, composition and performance requirements for cement grouts used to grout prestressing tendons in all types of structures (bridges, buildings, post‑tensioned elements). Its aim is to ensure long‑term protection of prestressing steel, bond where required, and void filling to avoid corrosion and frost damage.
Key topics and technical requirements
- Materials
- Cement: comply with EN 197‑1 (CEM I or other permitted types); cement type must be declared.
- Water: comply with EN 1008.
- Admixtures: permitted in accordance with EN 934‑2 / EN 934‑4; follow manufacturer instructions.
- Additions: silica fume allowed if EN 13263 compliant; other concrete additions as permitted per EN 206‑1 and declared.
- Batching and mixing
- Materials batched by mass (water and liquid admixtures may be by mass or volume).
- Batching accuracy: ±2% for cement/dry admixtures/additions; ±1% for water/liquid admixtures.
- Mixing: mechanical mixing to produce homogeneous, stable grout; w/c ratio normally below 0.4 and must be declared.
- Performance and properties (testing per EN 445)
- Sieve test: no lumps retained.
- Fluidity: measured by cone or spread methods; limits apply immediately after mixing and 30 min later (fluidity must not change >20% over that period).
- Bleeding: ≤ 0.3% of initial volume after 3 h (wick‑induced or inclined tube test).
- Volume change: between −1% and +5% after 24 h at rest.
- Strength: ≥ 30 N/mm² at 28 days (or ≥ 27 N/mm² at 7 days if estimating 28‑day strength).
- Setting time: initial set ≥ 3 h, final set ≤ 24 h (EN 196‑3).
- Chemical limits: chloride ≤ 0.10% (by weight of cement), sulfates ≤ 4.5%, sulfide ions ≤ 0.01% (sum from constituent materials).
- Conformity & quality
- Manufacturer production control, initial type testing (new mixes or material changes), and periodic audit testing to confirm ongoing compliance.
Applications
- Grouting of prestressing tendons in:
- Bridges and civil infrastructure
- Commercial and residential buildings with post‑tensioning
- Precast prestressed elements
- Primary functions: protect prestressing steel from corrosion, provide bond where required, transfer transverse stresses and fill voids to prevent frost damage.
Who should use this standard
- Grout manufacturers and suppliers
- Structural and bridge engineers (specification and design)
- Contractors and specialist grouting crews (execution and mixing)
- Quality control/assurance inspectors and testing laboratories
- Procurement and standards teams writing specifications
Related standards
- EN 445 - Grout for prestressing tendons: Test methods
- EN 446 - Grout for prestressing tendons: Grouting procedures
- EN 196‑3, EN 197‑1, EN 206‑1, EN 934‑2 / EN 934‑4, EN 13263
EN 447:2007 is essential when specifying or testing cement grout for prestressing tendons, ensuring consistent performance, durability and safety of prestressed concrete works.
Frequently Asked Questions
EN 447:2007 is a standard published by the European Committee for Standardization (CEN). Its full title is "Grout for prestressing tendons - Basic requirements". This standard covers: This European Standard covers the materials that may be used in the manufacture of cement grouts and the required properties and composition of the grout. It is applicable to grouting of tendons in all types of structures including bridges and buildings.
This European Standard covers the materials that may be used in the manufacture of cement grouts and the required properties and composition of the grout. It is applicable to grouting of tendons in all types of structures including bridges and buildings.
EN 447:2007 is classified under the following ICS (International Classification for Standards) categories: 91.100.30 - Concrete and concrete products. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 447:2007 has the following relationships with other standards: It is inter standard links to EN 447:1996. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 447:2007 is associated with the following European legislation: Standardization Mandates: M/BC/CEN/87/11. 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.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Grout for prestressing tendons - Basic requirementsInjekcijska masa za prednapete kable - Osnovne zahteveCoulis pour câble de précontrainte - Prescriptions pour les coulis courantsEinpressmörtel für Spannglieder - Allgemeine AnforderungenTa slovenski standard je istoveten z:EN 447:2007SIST EN 447:2008en,fr,de91.100.30ICS:SIST EN 447:19981DGRPHãþDSLOVENSKI
STANDARDSIST EN 447:200801-marec-2008
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 447October 2007ICS 91.100.30Supersedes EN 447:1996
English VersionGrout for prestressing tendons - Basic requirementsCoulis pour câble de précontrainte - Prescriptions pour lescoulis courantsEinpressmörtel für Spannglieder - AllgemeineAnforderungenThis European Standard was approved by CEN on 21 June 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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 STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 447:2007: E
• Provide protection to the prestressing steel against corrosion; • Provide a bond between the prestressing steel and the ducts where required for the design of the structure; • Allow transfer of compressive stresses in the structure in a direction transverse to internal tendons; • Fill all voids where water may accumulate and cause frost damage. The testing regimes anticipated by this European Standard include three levels: (1) Initial type and audit testing in accordance with this European standard; (2) Suitability testing for confirmation of the selected grout for a specific project in accordance with EN 446; (3) Inspection during grouting works on a specific project in accordance with EN 446. The test methods for each of the regimes are given in EN 445.
System of CEN and EOTA documents as basis for design, execution and materials selection for protective measures of prestressing systems (only main modules). EN 1992 Eurocode 2:Design of concrete structures prEN 13670 Execution of concrete structures ETAG 013 Post-tensioning kits for prestressing
of structuresEN 446 Grout for prestressing tendons Grouting proceduresEN 447 Grout for prestressing tendonsBasic requirementsEN 445 Grout for prestressing tendonsTest methods CEN Workshop Agreement CWA 14646 Requirements for the installation of post-tensioning kits for prestressing of structures and qualification of specialist company and its personnel.
1 Scope This European Standard covers the materials that may be used in the manufacture of cement grouts and the required properties and composition of the grout. It is applicable to grouting of tendons in all types of structures including bridges and buildings. 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 196-3, Methods of testing cement – Part 3: Determination of setting times and soundness EN 197-1, Cement – Part 1: Composition, specifications and conformity criteria for common cements EN 206-1:2000, Concrete – Part 1: Specification, performance, production and conformity EN 445, Grout for prestressing tendons – Test methods EN 446, Grout for prestressing tendons – Grouting procedures EN 934-2, Admixtures for concrete, mortar and grout – Part 2: Concrete admixtures - Definitions, requirements, conformity, marking and labelling
EN 934-4, Admixtures for concrete, mortar and grout – Part 4: Admixtures for grout for prestressing tendons – Definitions, requirements, conformity, marking and labelling EN 1008, Mixing water for concrete – Specification for sampling, testing and assessing the suitability of water, including water recovered from processes in the concrete industry, as mixing water for concr
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The EN 447:2007 standard outlines the essential requirements for grout used in prestressing tendons, making it a crucial document for professionals in the construction and engineering sectors. This European Standard defines the scope of materials permissible for the production of cement grouts, emphasizing the importance of properties such as strength, fluidity, and shrinkage control. One of the key strengths of the EN 447:2007 standard is its comprehensive approach to the composition of grouts. It specifies clear parameters that ensure the durability and reliability of prestressing systems in diverse structural applications, including bridges and buildings. By addressing various types of structures, the standard caters to a wide audience, enabling consistent quality and performance across different construction projects. The relevance of SIST EN 447:2008 cannot be overstated, particularly in the context of enhancing safety and structural integrity. As prestressing is a critical technique in modern engineering, adherence to this standard helps mitigate potential failures that can arise from suboptimal grouting practices. Furthermore, the standard promotes a uniform understanding of quality assurance among manufacturers and contractors, which is essential in an industry where precision and compliance are paramount. In summary, EN 447:2007 serves as a vital reference point for the manufacturing and application of grouts for prestressing tendons, providing essential guidelines that support both safety and performance in various structural contexts.
SIST EN 447:2008은 프리스트레싱 텐돈을 위한 그라우트의 기본 요구 사항을 규정하는 유럽 표준으로, 이 문서는 시멘트 그라우트의 제조에 사용될 수 있는 재료와 그라우트의 필수 속성 및 조성을 다룹니다. 이 표준의 범위는 교량 및 건물과 같은 모든 유형의 구조물에서 텐돈의 그라우팅에 적용될 수 있습니다. 이 표준의 강점은 다양한 구조물에 대한 그라우팅 요구 사항을 포괄적으로 다루고 있다는 점입니다. 이는 구조물의 안전성과 내구성을 높이는 데 중요한 역할을 합니다. 또한, SIST EN 447:2008은 그라우트 제조에 필요한 재료의 품질 기준을 명확히 하여, 시공 과정에서의 문제를 예방하고 품질을 보장할 수 있도록 도와줍니다. SIST EN 447:2008의 관련성은 현대 건설 산업에서 매우 뚜렷합니다. 프리스트레싱 기술이 널리 사용되는 상황에서, 이 표준은 그라우트의 성능 및 안정성을 최적화하기 위한 기초 자료로서 필수적입니다. 특히 교량과 같은 대규모 구조물의 안전 확보에 기여함으로써, 이 표준은 공학적 신뢰성을 높이는 데 중요한 역할을 합니다. 종합적으로, SIST EN 447:2008은 프리스트레싱 텐돈 그라우트에 대한 요구 사항을 체계적으로 정리한 문서로, 이 분야에 종사하는 모든 전문가들에게 중요한 참고자료가 될 것입니다.
Die Norm EN 447:2007, mit dem Titel „Grout for prestressing tendons - Basic requirements“, bietet eine umfassende Grundlage für die Verwendung von Zementmörteln in der modernen Bauindustrie. Der Fokus dieser europäischen Norm liegt auf den Materialien, die für die Herstellung von Zementmörteln verwendet werden können, sowie auf den geforderten Eigenschaften und der Zusammensetzung des Mörtels. Die Norm ist besonders relevant für das Instandsetzen und die Verstärkung von Bauwerken wie Brücken und anderen Gebäuden. Ein herausragendes Merkmal dieser Norm ist ihre Anwendung in einer Vielzahl von Strukturen, was ihre Flexibilität und Vielseitigkeit unter Beweis stellt. Sie gewährleistet, dass die verwendeten Materialien die für die Beanspruchung der vorgespannter Seile erforderlichen Eigenschaften aufweisen, was für die Langlebigkeit und Sicherheit der Konstruktionen entscheidend ist. Durch die Festlegung klarer Anforderungen an die Zusammensetzung und die Eigenschaften des Mörtels hilft die Norm, ein hohes Qualitätsniveau im Bauwesen zu gewährleisten. Zudem fördert die Norm EN 447:2007 die Einhaltung von Sicherheitsstandards, indem sie spezifische Eigenschaften definiert, die die Grout-Materialien erfüllen müssen. Dies sorgt nicht nur für eine optimierte Leistung der Mörtel, sondern auch für eine erhöhte Zuverlässigkeit bei der Verwendung in tragenden Konstruktionen. Die Standardisierung der Anforderungen trägt somit maßgeblich zur Qualitätssicherung im Bauwesen bei. Insgesamt bietet die SIST EN 447:2008 eine wertvolle Richtlinie für Architekten, Ingenieure und Bauunternehmen, die die Verwendung von Zementmörteln in ihren Projekten planen. Ihre Stärken liegen in der gründlichen Definition der Anforderungen und der breiten Anwendbarkeit auf verschiedene Baukonstruktionen, was sie zu einem unverzichtbaren Dokument für die Branche macht.
La norme EN 447:2007, intitulée "Grout for prestressing tendons - Basic requirements", est un document essentiel dans le domaine du génie civil et de la construction. Elle établit des exigences fondamentales pour les matériaux utilisés dans la fabrication de mortiers à base de ciment, soulignant ainsi l'importance de la qualité des matériaux de scellement pour les éléments de précontrainte dans les structures. Le champ d'application de cette norme est vaste, puisqu'elle s'applique à la réalisation de joints de scellement dans tous types de structures, y compris les ponts et les bâtiments. Ce domaine d'application souligne la pertinence de la norme, qui garantit la sécurité et la durabilité des infrastructures en assurant des caractéristiques de performance élevées pour les mortiers. Parmi les points forts de la norme EN 447:2007, on trouve la clarté des exigences de composition et de propriétés des mortiers. Cela inclut des spécifications précises sur la résistance, la durabilité et l'adhérence, qui sont essentielles pour le bon fonctionnement des éléments en précontrainte. En fixant des normes élevées pour les matériaux, cette norme contribue à réduire les risques d'échec des structures et à prolonger leur durée de vie. En outre, cette norme est d'une grande importance pour les professionnels du bâtiment et du génie civil, car elle fournit un cadre uniformisé qui facilite le dialogue entre les différents acteurs de la construction. L'adhésion à la norme EN 447:2007 permet de garantir que les mortiers utilisés répondent à des critères de performance rigoureux, ce qui est crucial pour des réalisations d'ingénierie de qualité. En résumé, la norme SIST EN 447:2008 joue un rôle fondamental dans l'assurance de la qualité des mortiers de scellement pour les éléments de précontrainte. Sa portée, ses forces en matière de spécifications et sa pertinence dans divers types de constructions en font un document indispensable pour les professionnels engagés dans ce domaine.
SIST EN 447:2008は、プレストレス鋼材用のグラウトに関するヨーロッパ標準であり、その基本要件を詳述しています。この標準は、セメントグラウトの製造に使用される材料、およびグラウトの必要な特性と組成に関して規定しています。標準の適用範囲は非常に広く、橋や建物を含むあらゆる種類の構造物のテンドンのグラウトに対応しています。 この標準の強みは、明確な材料要件と性能基準を提供する点であり、施工時の一貫性を確保します。プレストレス構造物の耐久性や安全性を高めるために、適切な品質のセメントグラウトを使用することが求められるため、業界全体における標準化が進むことに寄与しています。具体的には、強度、密度、流動性に関する詳細な基準が設定されており、これにより施工者は信頼性の高いグラウトを確保できます。 また、SIST EN 447:2008は、グラウトの長期的な性能と耐環境性に焦点を当てており、特にヒューム煙やその他の添加物に関する要求事項も含まれています。この点は、構造物の耐久性を向上させる上で重要であり、特に厳しい気候条件や腐食性環境における使用においてその重要性が増します。 さらに、この標準は、EU加盟国全体での受け入れ可能な品質基準を提供し、国際的な建設基準との整合性を持たせています。これにより、国際的なプロジェクトでの取り扱いや施工においても一貫性が保たれ、国境を越えたビジネスチャンスを広げる役割を果たします。 以上の理由から、SIST EN 447:2008はプレストレスト鋼材用グラウトの確実な執行と高品質な施工を支えるための非常に関連性の高い標準であり、業界における重要なガイドラインとして機能しています。
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