EN 12697-2:2015/prA1

Overview

EN 12697-2:2015/prA1 is a European Standard developed by CEN that specifies the test method for determining the particle size distribution of aggregates within bituminous mixtures. This standard applies to aggregates recovered after binder extraction following the procedures outlined in EN 12697-1 or EN 12697-39. Accurate assessment of particle size distribution is essential for evaluating the quality and performance of bituminous mixtures used in road construction and related civil engineering applications.

This amendment (prA1) modifies certain clauses in the original 2015 standard, ensuring up-to-date consistency in aggregate testing methods. It is a key reference for laboratories and industry professionals seeking standardized procedures for asphalt mixture analysis.

Key Topics

• Particle Size Distribution Testing
  The core focus of EN 12697-2:2015/prA1 is the sieving process to determine the particle size distribution of aggregates in bituminous mixtures. This quantifies the proportion of aggregate particles across different size ranges which directly influences mixture performance.

• Applicability
  The test method is applicable specifically to aggregates extracted from bituminous mixtures, ensuring compatibility with binder extraction methods defined in EN 12697-1 and EN 12697-39.

• Effect of Additives
  The presence of fibres, solid non-soluble additives, and some binder modifiers can influence particle size measurement results, highlighting the need for professional judgment when interpreting test outcomes.

• Updated Clauses
  Amendments in prA1 include deletion of certain reporting requirements related to visually different aggregate types and particle descriptions in test portions, simplifying the test protocol.

Applications

This standard is extensively applied in the following areas:

• Road Construction Materials Testing
  Ensuring the aggregate grading in asphalt mixtures meets design specifications for durability, workability, and safety.

• Quality Control in Asphalt Production
  Routine particle size analysis helps manufacturers maintain consistent mixture properties for optimal pavement performance.

• Research and Development
  Evaluating new bituminous mixture formulations or additives requires precise aggregate characterization as per EN 12697-2 procedures.

• Compliance with Product Standards
  The standard's applicability is referenced in broader product standards for bituminous mixtures, making it integral to regulatory and contractual quality assurance.

Related Standards

To fully implement EN 12697-2:2015/prA1 in aggregate and bituminous mixture testing, consider the following associated standards:

• EN 12697-1: Bituminous mixtures - Test methods - Part 1: Sampling
  Defines sampling principles necessary before particle size distribution testing.

• EN 12697-39: Bituminous mixtures - Test methods - Part 39: Binder content - Recovery method by extraction
  Specifies methods to extract aggregates for subsequent particle sizing.

• EN 12697 Series
  A comprehensive suite of standards covering various test methods for bituminous mixtures includes compaction, binder content, and performance testing.

• Relevant Product Standards for Bituminous Mixtures
  These product-specific standards reference EN 12697-2 for aggregate grading criteria.

Keywords: EN 12697-2, particle size distribution, bituminous mixtures test, aggregate grading, asphalt testing standards, binder extraction, road construction materials, CEN standards, bituminous mixture quality control, aggregate testing method.