SIST EN 14630:2007

Products and systems for the protection and repair of concrete structures - Test methods - Determination of carbonation depth in hardened concrete by the phenolphthalein method

The phenolphthalein test method is intended to measure the depth of the carbonated layer near the surface of hardened concrete. It is not suitable for concrete made with calcium aluminate cement. It may be used on site or in the laboratory, on test specimens or on cores or fragments removed from hardened concrete structures.

Produkte und Systeme für den Schutz und die Instandsetzung von Betontragwerken - Prüfverfahren - Bestimmung der Karbonatisierungstiefe im Festbeton mit der Phenolphthalein-Prüfung

Die Phenolphthalein Prüfung ist für die Bestimmung der Karbonatisierungstiefe nahe der Oberfläche des Festbetons vorgesehen. Sie ist nicht geeignet für Beton, der aus Tonerdezement hergestellt wurde. Sie kann am Einsatzort oder im Labor an Probekörpern oder an aus dem Festbeton entnommenen Bohrkernproben oder Bruchstücken angewendet werden.

Produits et systemes pour la protection et la réparation des structures en béton - Méthodes d'essai - Mesurage de la profondeur de carbonatation d'un béton armé par la méthode phénolphtaléine

La méthode d’essai à la phénolphtaléine sert à mesurer la profondeur de la couche carbonatée située près de la surface du béton durci. Cette méthode ne convient pas lorsque le béton est formé à base de ciment alumineux. Elle peut être utilisée sur site ou en laboratoire, sur des éprouvettes, des carottes ou des fragments prélevés sur des structures en béton durci.

Proizvodi in sistemi za zaščito in popravilo betonskih konstrukcij - Preskusne metode - Ugotavljanje globine karbonatizacije v strjenem betonu z fenolftaleinsko metodo

General Information

• Status: Published
• Publication Date: 28-Feb-2007
• ICS: 91.080.40 - Concrete structures
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: BBB - Concrete, reinforced concrete and prestressed concrete
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Mar-2007
• Due Date: 01-Mar-2007
• Completion Date: 01-Mar-2007
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Ref Project: EN 14630:2006 - Products and systems for the protection and repair of concrete structures - Test methods - Determination of carbonation depth in hardened concrete by the phenolphthalein method

SIST EN 14630:2007 Overview

SIST EN 14630:2007 is a European Standard developed by CEN that specifies a test method for determining the carbonation depth in hardened concrete using the phenolphthalein indicator. This standard is part of a broader series focusing on products and systems for the protection and repair of concrete structures. The phenolphthalein test provides a practical and widely accepted approach to measuring how deeply carbonation has penetrated a concrete surface-a critical factor affecting the durability and corrosion resistance of reinforced concrete.

Carbonation reduces the alkalinity of concrete, thereby compromising the protective environment around embedded steel reinforcement. Measuring carbonation depth helps assess the concrete's capacity to protect steel and informs decisions regarding maintenance and repair.

Key Topics

• Scope: SIST EN 14630:2007 applies to hardened concrete surfaces except those made with calcium aluminate cement. Testing can be conducted on-site or in laboratories, using test specimens or extracted cores/fragments.

• Phenolphthalein Test Principle: Phenolphthalein indicator turns red-purple in concrete with a pH above approximately 9, indicating uncarbonated concrete. Carbonated concrete with lowered pH remains colorless or neutral when sprayed.

• Materials & Apparatus:

  • Phenolphthalein solution prepared with phenolphthalein dissolved in ethyl or isopropyl alcohol diluted with distilled water.
  • Suitable spray container.
  • Measurement tools like calipers or rulers for depth measurement to the nearest millimeter.

• Sampling Procedure:

  • Samples must be representative and follow a pre-defined sampling plan.
  • In-situ testing involves chiseling or drilling to expose fresh concrete surfaces.
  • Core samples must be properly oriented and stored to prevent moisture loss and ensure accuracy.
  • Surfaces must be freshly broken and free from water or abrasion before testing.

• Test Procedure:

  • Freshly broken surfaces are sprayed with phenolphthalein solution.
  • The carbonation front is identified by the visible boundary between colored (alkaline) and colorless (carbonated) concrete.
  • Measurements of the average and maximum carbonation depth are taken to understand the extent and variability of carbonation.

• Results Interpretation:

  • Average carbonation depth (dk mean) helps assess general carbonation penetration.
  • Maximum depth (dk max) captures isolated deeper pockets but is excluded from average calculations if significantly different.
  • Special considerations include the impact of hydrophobic treatments and additives that may affect color development.

• Reporting:

  • Detailed test reports include date/time, tester identity, weather conditions, sample descriptions, indicator solution composition, carbonation depths, and observations.
  • Locations of samples should be clearly documented for traceability.
  • Reports should note any unusual observations such as delayed coloration or boundary diffuseness.

Applications

• Concrete Durability Assessment: Carbonation depth testing per SIST EN 14630:2007 is essential for evaluating the protective capacity of concrete cover over steel reinforcement, crucial for maintaining structural durability.

• Maintenance and Repair Planning: Results inform the selection of appropriate repair products and protection systems, as outlined in related standards like ENV 1504-9.

• Quality Control: Used on new constructions or repaired structures to verify that carbonation levels remain within acceptable limits.

• Research and Forensic Analysis: Provides data for studies on concrete degradation and for post-failure investigation of corrosion-related damage.

Related Standards

• ENV 1504-9: Defines general principles and criteria for protection and repair systems of concrete structures, underpinning the broader context of carbonation measurement and repair strategy.

• Other Test Methods: While EN 14630 focuses on the phenolphthalein method, alternative approaches like petrographic examination may complement or confirm results where boundaries are diffuse or slow color changes occur.

• National Standards: SIST EN 14630:2007 is adopted as a national standard by CEN member countries, ensuring harmonized methodology and reporting across Europe.

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By adhering to SIST EN 14630:2007, engineers and inspectors can accurately measure carbonation depth, contributing to informed decision-making for concrete structure maintenance, improved longevity, and cost-effective repair solutions. This standard remains fundamental in concrete durability management across the construction and civil engineering sectors.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Products and systems for the protection and repair of concrete structures - Test methods - Determination of carbonation depth in hardened concrete by the phenolphthalein methodPHWRGRProduits et systemes pour la protection et la réparation des structures en béton - Méthodes d'essai - Mesurage de la profondeur de carbonatation d'un béton armé par la méthode phénolphtaléineProdukte und Systeme für den Schutz und die Instandsetzung von Betontragwerken - Prüfverfahren - Bestimmung der Karbonatisierungstiefe im Festbeton mit der Phenolphthalein-PrüfungTa slovenski standard je istoveten z:EN 14630:2006SIST EN 14630:2007en91.100.30Beton in betonski izdelkiConcrete and concrete products91.080.40Betonske konstrukcijeConcrete structuresICS:SLOVENSKI
STANDARDSIST EN 14630:200701-marec-2007

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14630October 2006ICS 91.100.30 English VersionProducts and systems for the protection and repair of concretestructures - Test methods - Determination of carbonation depthin hardened concrete by the phenolphthalein methodProduits et systèmes pour la protection et la réparation desstructures en béton - Méthodes d'essais - Mesurage de laprofondeur de carbonatation d'un béton armé par laméthode phénolphtaleineProdukte und Systeme für den Schutz und dieInstandsetzung von Betontragwerken - Prüfverfahren -Bestimmung der Karbonatisierungstiefe im Festbeton mitder Phenolphthalein-PrüfungThis European Standard was approved by CEN on 7 September 2006.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, 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© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14630:2006: E
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