EN 12390-18:2021/FprA1

Testing hardened concrete - Part 18: Determination of the chloride migration coefficient

This document specifies the procedure for obtaining the non-steady-state chloride migration coefficient of specimens of hardened concrete at a specified age (see Annex A). The test procedure does not take into account any interaction of concrete with the saline solution over time. The test result is a durability indicator with respect to the resistance of the concrete investigated against chloride penetration.
The test procedure does not apply to concrete specimens with surface treatments such as silanes.
If the aggregate or any other embedded elements (such as metallic fibres or conducting particles) are electrically conductive, this will influence the magnitude of chloride migration. This fact is taken into account when establishing threshold values. It prevents comparison of chloride migration values between concretes if the aggregates induce a difference of half an order of magnitude (higher or lower) of chloride migration.

Prüfung von Festbeton - Teil 18: Bestimmung des Chloridmigrationskoeffizienten

Essais pour béton durci - Partie 18 : Détermination du coefficient de migration des chlorures

Preskušanje strjenega betona - 18. del: Določanje koeficienta migracije klorida - Dopolnilo A1

General Information

• Status: Not Published
• Publication Date: 18-Sep-2024
• ICS: 91.100.30 - Concrete and concrete products
• Technical Committee: CEN/TC 104 - Concrete ( performance, production, placing and compliance criteria )
• Drafting Committee: CEN/TC 104/SC 1 - Revision of ENV 206
• Current Stage: 5060 - Closure of Vote - Formal Approval
• Start Date: 25-Jul-2024
• Due Date: 26-Aug-2024
• Completion Date: 25-Jul-2024
• Ref Project: SIST EN 12390-18:2021/kFprA1:2024 - Testing hardened concrete - Part 18: Determination of the chloride migration coefficient

Relations

• Merged Into: EN 12390-18:2021+A1:2024 - Testing hardened concrete - Part 18: Determination of the chloride migration coefficient
• Effective Date: 31-Jul-2024
• Amends: EN 12390-18:2021 - Testing hardened concrete - Part 18: Determination of the chloride migration coefficient
• Effective Date: 10-Aug-2022

Overview

The EN 12390-18:2021/FprA1 standard, developed by CEN (European Committee for Standardization), governs the testing of hardened concrete to determine the chloride migration coefficient. This procedure measures the non-steady-state chloride migration coefficient of concrete specimens at a specified age, providing a key durability indicator related to the concrete's resistance against chloride penetration - a major factor affecting long-term concrete performance and corrosion risk of embedded reinforcement.

By specifying the appropriate test methods, EN 12390-18:2021/FprA1 enables practitioners to assess concrete durability and quality control with respect to chloride ingress, a critical consideration in infrastructure exposed to marine environments, de-icing salts, or other chloride sources.

---

Key Topics

• Chloride Migration Coefficient (non-steady-state): This coefficient quantifies the rate at which chloride ions move through hardened concrete under an applied electrical potential, reflecting resistance to chloride penetration.
• Test Procedure: The method does not consider long-term interactions between concrete and saline solutions but offers a standardized rapid test for durability assessment.
• Specimen Requirements: Only untreated concrete surfaces can be tested; specimens with surface treatments such as silanes are excluded.
• Influence of Electrically Conductive Components: Aggregates or embedded elements like metallic fibers or conducting particles can impact chloride migration results. The standard accounts for these influences in setting threshold values.
• Measurement and Calculation: Updated provisions specify how to determine penetration depths and calculate the chloride migration coefficient using corrected formulas incorporating specimen dimensions, test temperature, voltage, and time.
• Modifications in Amendment A1: Clarification of symbols, apparatus details (e.g., swapping catholyte and anolyte labels), and correction of key calculation formulae enhance test accuracy.

---

Applications

This standard is vital for engineers, laboratories, and quality assurance professionals involved in:

• Concrete Durability Assessment: Evaluating concrete’s resistance to chloride ion ingress helps predict service life and corrosion risk of reinforced concrete structures.
• Infrastructure Projects: Particularly important for marine constructions, bridges, tunnels, and pavements exposed to chloride-containing environments such as seawater or de-icing salts.
• Quality Control: Monitoring chloride ingress during production and curing phases to ensure compliance with durability specifications.
• Research and Development: Supporting innovation in concrete mix designs with enhanced chloride resistance by providing a standardized testing benchmark.
• Regulatory Compliance and Certification: Assisting in meeting environmental and safety standards requiring chloride resistance evaluations.

---

Related Standards

• EN 12390 Series: Complementary parts of the EN 12390 series covering other hardened concrete testing methods such as compressive strength and water permeability.
• EN 206: Specification and conformity of concrete, including durability classes related to chloride exposure.
• ISO 22738: Test methods for chloride penetration in concrete.
• ASTM C1202: Rapid chloride permeability test providing an alternative method to EN 12390-18.

---

By employing EN 12390-18:2021/FprA1, stakeholders can reliably quantify chloride migration coefficients, facilitating durability-based specifications and enhancing the longevity of concrete structures subjected to chlorides. This standard remains a cornerstone in assessing concrete quality against one of the most detrimental durability threats in modern construction.

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 12390-18:2021/oprA1:2023
01-julij-2023
Preskušanje strjenega betona - 18. del: Določanje koeficienta migracije klorida -
Dopolnilo A1
Testing hardened concrete - Part 18: Determination of the chloride migration coefficient
Prüfung von Festbeton - Teil 18: Bestimmung des Chloridmigrationskoeffizienten
Essais pour béton durci - Partie 18 : Détermination du coefficient de migration des
chlorures
Ta slovenski standard je istoveten z: EN 12390-18:2021/prA1
ICS:
91.100.30 Beton in betonski izdelki Concrete and concrete
products
SIST EN 12390-18:2021/oprA1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 12390-18:2021/oprA1:2023

SIST EN 12390-18:2021/oprA1:2023

DRAFT
EUROPEAN STANDARD
EN 12390-18:2021
NORME EUROPÉENNE
EUROPÄISCHE NORM
prA1
May 2023
ICS 91.100.30
English Version
Testing hardened concrete - Part 18: Determination of the
chloride migration coefficient
Essais pour béton durci - Partie 18 : Détermination du Prüfung von Festbeton - Teil 18: Bestimmung des
coefficient de migration des chlorures Chloridmigrationskoeffizienten
This draft amendment is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 104.

This draft amendment A1, if approved, will modify the European Standard EN 12390-18:2021. If this draft becomes an
amendment, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
inclusion of this amendment into the relevant national standard without any alteration.

This draft amendment was established by CEN 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, Türkiye and
United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and
...