EN 12390-18:2021/FprA1

Overview

EN 12390-18:2021/FprA1 is a European standard developed by CEN for the testing of hardened concrete, specifically focusing on the determination of the chloride migration coefficient. This document outlines a consistent procedure to measure how effectively concrete resists chloride ion penetration, which is a critical factor in assessing the durability and longevity of concrete structures. The standard is particularly relevant for concrete used in environments where exposure to deicing salts, seawater, or other sources of chlorides is likely, as chloride ingress can lead to reinforcement corrosion and structural deterioration.

Key Topics

• Chloride Migration Coefficient: Defines the non-steady-state coefficient as a key indicator of concrete’s resistance to chloride penetration.
• Testing Procedure: Details the preparation and testing of concrete specimens at a specified age, ensuring reliable and comparable results.
• Scope Limitations: Excludes specimens with surface treatments (e.g., silanes) or with electrically conductive aggregates or embedded components, as these can distort test outcomes.
• Standardized Equipment and Calculation: Specifies required apparatus and calculation methods for the chloride migration coefficient, including temperature, voltage, specimen dimensions, and timing.
• Modifications in Amendment: Clarifies symbols, figures, and calculation updates to improve accuracy and applicability.

Applications

The methods described in EN 12390-18:2021/FprA1 are widely applicable across the construction industry, research institutions, and quality control environments, with practical uses including:

• Durability Assessment: Quantifying concrete’s resistance to chloride ingress for critical structures such as bridges, parking decks, marine infrastructure, and tunnels.
• Material Comparison and Selection: Providing a standardized measurement for comparing the chloride resistance performance of different concrete mixes or reinforcement strategies.
• Quality Control: Ensuring concrete supplied to construction meets required durability specifications.
• Research and Development: Supporting innovation in concrete materials, mix designs, and admixtures by providing a reliable indicator of chloride transport properties.
• Regulatory Compliance: Assisting in meeting performance-based standards and requirements related to chloride ingress and long-term durability.

Industries and Stakeholders

• Civil and structural engineers
• Concrete manufacturers and suppliers
• Construction companies
• Testing laboratories
• Asset owners and facility managers
• Regulatory and certification bodies

Related Standards

To provide comprehensive testing and performance evaluation for concrete structures, EN 12390-18:2021/FprA1 aligns with and complements the following related standards:

• EN 12390 Series: Covers various testing methods for hardened concrete, including compressive strength, density, and specimen preparation.
• EN 206: Specifies requirements for concrete production and compliance.
• EN 14629: Relates to the determination of chloride content of hardened concrete.
• ISO 1920 Series: Addresses broader concrete testing methods at the international level.

Practical Value

Implementing EN 12390-18:2021/FprA1 ensures a robust, industry-accepted method for measuring one of the most significant durability parameters of reinforced concrete. By following this standard, organizations can:

• Improve long-term structural integrity and sustainability
• Reduce maintenance costs related to chloride-induced corrosion
• Demonstrate compliance with European and international best practices
• Make informed decisions for materials specification and service life prediction

Adherence to this standard is a key element in advancing high-performance, durable construction and infrastructure projects throughout Europe and beyond.