kSIST FprEN 1428:2026

• Abstract:

  This document specifies a method for the determination of the water content in bituminous emulsions by means of azeotropic distillation.; WARNING — The use of this document can involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.

• Status: Not Published
• Public Enquiry End Date: 26-Mar-2026
• ICS: 75.140 - Waxes, bituminous materials and other petroleum products
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: VLA - Water proofing
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 28-Jul-2026
• Due Date: 15-Sep-2026
• Ref Project: FprEN 1428 - Bitumens and bituminous binders - Determination of water content in bituminous emulsions - Azeotropic distillation method

• Revises: SIST EN 1428:2012 - Bitumen and bituminous binders - Determination of water content in bituminous emulsions - Azeotropic distillation method
• Effective Date: 13-Dec-2023

Overview

kSIST FprEN 1428:2026 - Bitumens and bituminous binders - Determination of water content in bituminous emulsions - Azeotropic distillation method - specifies an analytical procedure for accurately determining the water content in bituminous emulsions using the azeotropic distillation method. This standard, prepared under the authority of SIST and CEN/TC 336, is intended for laboratories and professionals in the construction and materials industry, supporting quality assurance, product specification, and regulatory compliance for bituminous binders and emulsions.

The azeotropic distillation method is widely recognized for its reliability and precision in measuring water content, which is a critical parameter in evaluating the performance and durability of bituminous products. This standard supersedes EN 1428:2012, introducing refined requirements for solvents, apparatus settings, and procedural verification to enhance repeatability and reproducibility.

Keywords: bitumens, bituminous binders, bituminous emulsions, water content determination, azeotropic distillation, laboratory testing, SIST standard, European Norms, quality control.

Key Topics

• Purpose: Provides a standardized method for determining the water content in bituminous emulsions via azeotropic distillation.
• Method Principle: Water is separated from the emulsion by distillation with a water-immiscible solvent (such as toluene or xylene). The condensed distillate is collected and measured in a calibrated receiver.
• Safety: The procedure involves hazardous materials and operations. Users must implement proper safety and health measures, adhering to relevant regulatory requirements.
• Required Equipment and Materials:
  • Laboratory glassware (flask, condenser, receiver)
  • Solvent-carrier liquids (toluene as reference, xylene for routine use)
  • Balance with high accuracy (maximum permissible error of 0.05 g)
  • Distillation regulator (e.g., anti-bumping granules)
  • Clean, dry laboratory conditions
• Sample Preparation and Procedure:
  • Samples must be collected and prepared in accordance with related standards like EN 58 and EN 12594.
  • The sample mass is calculated to ensure optimal distillation performance.
  • The apparatus must be routinely verified for accuracy, especially when new or if results are questionable.
• Results and Reporting:
  • Water content is expressed as a mass percentage.
  • Testing includes repeatability and reproducibility criteria to ensure data integrity.
  • Test reports must reference the standard, detailing sample identification, procedure specifics, results, and any deviations.

Applications

• Quality Assurance and Control: Ensures the correct water content in bituminous emulsions, essential for consistent product performance in road construction and waterproofing applications.
• Specification Compliance: Provides a reliable basis for compliance with technical specifications and procurement requirements in the construction industry.
• Material Testing Laboratories: Facilitates standardized laboratory procedures to deliver repeatable and reproducible results across different facilities.
• Research and Development: Supports product development, process optimization, and investigative studies involving bituminous materials.
• Regulatory and Certification Bodies: Underpins conformity assessment and certification processes for bituminous emulsions.

Related Standards

• EN 58: Bitumen and bituminous binders - Sampling bituminous binders
• EN 12594: Bitumens and bituminous binders - Preparation of test samples
• EN 12597: Bitumens and bituminous binders - Terminology
• EN ISO 12937: Petroleum products - Determination of water - Coulometric Karl Fischer titration method
• EN ISO 3696: Water for analytical laboratory use - Specification and test methods

By implementing kSIST FprEN 1428:2026, stakeholders ensure reliable, reproducible, and industry-aligned results for water determination in bituminous emulsions, supporting both quality management and regulatory requirements in infrastructure projects.

SLOVENSKI STANDARD
oSIST prEN 1428:2026
01-marec-2026
Bitumen in bitumenska veziva - Določanje vode v bitumenskih emulzijah - Metoda
azeotropske destilacije
Bitumens and bituminous binders - Determination of water content in bituminous
emulsions - Azeotropic distillation method
Bitumen und bitumenhaltige Bindemittel - Bestimmung des Wassergehaltes von
Bitumenemulsionen - Azeotropisches Destillationsverfahren
Bitumes et liants bitumineux - Détermination de la teneur en eau dans les émulsions
bitumineuses - Méthode de distillation azéotropique
Ta slovenski standard je istoveten z: prEN 1428
ICS:
75.140 Voski, bitumni in drugi naftni Waxes, bituminous materials
proizvodi and other petroleum products
91.100.50 Veziva. Tesnilni materiali Binders. Sealing materials
oSIST prEN 1428:2026 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 1428:2026
oSIST prEN 1428:2026
DRAFT
EUROPEAN STANDARD
prEN 1428
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2026
ICS 91.100.50 Will supersede EN 1428:2012
English Version
Bitumens and bituminous binders - Determination of
water content in bituminous emulsions - Azeotropic
distillation method
Bitumes et liants bitumineux - Détermination de la Bitumen und bitumenhaltige Bindemittel -
teneur en eau dans les émulsions bitumineuses - Bestimmung des Wassergehaltes von
Méthode de distillation azéotropique Bitumenemulsionen - Azeotropisches
Destillationsverfahren
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 336.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard 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
© 2026 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 1428:2026 E
worldwide for CEN national Members.

oSIST prEN 1428:2026
prEN 1428:2026 (E)
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 4
5 Reagents and materials . 5
6 Apparatus . 5
7 Sampling . 7
8 Procedure. 7
8.1 Verification of apparatus . 7
8.2 Test . 7
9 Calculation . 8
10 Expression of results . 8
11 Precision . 8
11.1 Repeatability, r . 8
11.2 Reproducibility, R . 8
12 Test report . 9
Annex A (normative) Verification of apparatus .10
Bibliography .11

oSIST prEN 1428:2026
prEN 1428:2026 (E)
European foreword
This document (prEN 1428:2026) has been prepared by Technical Committee CEN/TC 336 “Bitumens
and Bituminous binders”, the secretariat of which is held by AFNOR.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1428:2012.
prEN 1428:2026 includes the following significant changes with respect to EN 1428:2012:
a) in 5.1, the definition of suitable solvent carrier liquid has been reviewed;
b) in 6.3, the description of the balance has been completed;
c) in 8.1, the requirement for the apparatus verification has been limited to any new apparatus and in
case of doubts;
d) in 8.2.4, the precision of the emulsion weighting has been defined.
oSIST prEN 1428:2026
prEN 1428:2026 (E)
1 Scope
This document specifies a method for the determination of the water content in bituminous emulsions
by means of azeotropic distillation.
WARNING — The use of this document can involve hazardous materials, operations and equipment. This
document does not purport to address all of the safety problems associated with its use. It is the
responsibility of the user of this document to establish appropriate safety and health practices and to
determine the applicability of regulatory limitations prior to use.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 58, Bitumen and bituminous binders — Sampling bituminous binders
EN 12594, Bitumens and bituminous binders — Preparation of test samples
EN 12597, Bitumens and bituminous binders — Terminology
EN ISO 12937, Petroleum products — Determination of water — Coulometric Karl Fischer titration method
(ISO 12937)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 12597 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org
3.1
water content
W
mass percentage of water determined
...