prEN 12697-13

Bituminous mixtures - Test methods - Part 13: Temperature measurement

This document describes a test method for measuring the temperature of asphalt mixtures after mixing and during storage, transportation and laying. This document includes the contact temperature-measuring device and the non-contact temperature-measuring device (infrared-thermometer). In cases of dispute, the refence method shall be using the contact temperature measuring device.

Asphalt - Prüfverfahren - Teil 13: Temperaturmessung

Dieses Dokument legt ein Prüfverfahren zur Messung der Temperatur von Asphaltgemischen nach der Mischung und während Lagerung, Transport und Einbau fest. In diesem Dokument werden sowohl Kontakt-Temperaturmesseinrichtungen als auch berührungslose Temperaturmesseinrichtungen (Infrarot-Thermometer) erfasst. In Streitfällen muss das Referenzverfahren mit der Kontakt- Temperaturmesseinrichtung angewandt werden.

Mélanges Bitumineux - Méthodes ďessai - Partie 13: Mesure de la température

Ce document décrit une méthode d'essai permettant de mesurer la température des mélanges bitumineux après malaxage et pendant le stockage, le transport et la mise en oeuvre. Cette norme inclus l’utilisation de dispositif de mesure de la température par contact et de dispositif de mesure de la température sans contact (thermomètre à infrarouge). En cas de litige, la méthode de référence devra être l'appareil de mesure de la température par contact.

Bitumenske zmesi - Preskusne metode - 13. del: Merjenje temperature

General Information

• Status: Not Published
• Publication Date: 01-Jun-2026
• ICS: 93.080.20 - Road construction materials
• Technical Committee: CEN/TC 227 - Road materials
• Drafting Committee: CEN/TC 227/WG 1 - Bituminous mixtures
• Current Stage: 4060 - Closure of enquiry - Enquiry
• Start Date: 03-Apr-2025
• Due Date: 07-Apr-2025
• Completion Date: 03-Apr-2025
• Ref Project: oSIST prEN 12697-13:2025 - Bituminous mixtures - Test methods - Part 13: Temperature measurement

Relations

• Revises: EN 12697-13:2017 - Bituminous mixtures - Test methods - Part 13: Temperature measurement
• Effective Date: 21-Feb-2024

Overview

The prEN 12697-13:2025 standard, developed by CEN/TC 227, specifies the test methods for temperature measurement of bituminous mixtures used in road construction. This standard covers procedures for measuring the temperature of asphalt mixtures immediately after mixing and during the critical phases of storage, transportation, and laying. It defines two primary methods for temperature measurement:

• Contact temperature measuring devices (probes)
• Non-contact temperature measuring devices (infrared thermometers)

Importantly, in cases of dispute over temperature results, the contact temperature measurement method is defined as the reference standard.

This updated standard supersedes the 2017 version, introducing refined accuracy requirements and improved reporting guidelines essential for quality assurance and compliance in asphalt production and paving processes.

Key Topics

• Measurement Scope and Conditions
  Temperature measurements are taken at multiple stages: directly in the transport vehicle (lorry), in heaps after unloading, during laying on the road surface, and at the paver hopper. These measurements are critical to ensure the asphalt mixture retains ideal temperatures for optimal compaction and durability.

• Contact Temperature Measurement
  Utilizes a probe inserted into the material at specified depths (minimum 100 mm insertion). The measuring device must determine temperature to the nearest 1°C, with a maximum error margin of ±2°C. The method includes conditioning the device prior to measurements, systematic probing at multiple locations, and averaging results to ensure precision.

• Infrared Thermometer Use
  Employs a non-contact sensor to detect thermal radiation from the asphalt surface across wavelengths between 2 µm and 14 µm. Users must adjust the emissivity setting on the device, typically between 0.90 and 0.98 depending on the asphalt mix, for accurate readings. The infrared method requires calibration against the contact method before use to align measurements.

• Safety and Accuracy Considerations
  Both measurement techniques emphasize operator safety, especially when measuring hot materials on transport vehicles or close to heavy equipment. The standard also outlines the positioning and angle of devices to ensure consistent and reliable readings.

• Test Reporting Requirements
  Comprehensive reporting is mandated to facilitate traceability and quality control. Reports must include references to the standard, sample identification, measurement location, device type, and the average temperature recorded in degrees Celsius.

Applications

• Quality Control in Asphalt Production
  Maintaining correct temperature ranges during mixing, transport, and laying influences the compaction and longevity of road surfaces. This standard guides producers and contractors to verify that mixtures are within specification limits at every stage.

• On-Site Temperature Monitoring
  Enables paving supervisors to measure and document asphalt temperatures effectively, preventing premature cooling or overheating that can compromise road performance.

• Dispute Resolution
  Provides an authoritative testing framework to resolve temperature measurement disputes by establishing the contact thermometer method as the official reference.

• Material Research and Development
  Facilitates consistent temperature data collection during the development of new bituminous mixtures and paving processes, supporting innovation.

Related Standards

• EN 12697 Series: The complete framework of test methods for bituminous mixtures, covering composition, physical properties, and performance testing.
• ISO and IEC Terminology: For standardized vocabulary related to temperature measurement devices and testing methodologies.
• EN 12697-12: Covers compaction methods, complementing temperature measurement by assessing workability.
• EN 12697-26: Establishes test methods related to particle analysis, relevant in conjunction with temperature-controlled handling.

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This standard is essential for professionals involved in road construction and asphalt technology, ensuring precise temperature measurement techniques that uphold material integrity and road quality worldwide. For more information, visit the CEN website.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2025
Bitumenske zmesi - Preskusne metode - 13. del: Merjenje temperature
Bituminous mixtures - Test methods - Part 13: Temperature measurement
Asphalt - Prüfverfahren - Teil 13: Temperaturmessung
Mélanges Bitumineux - Méthodes ďessai - Partie 13: Mesure de la température
Ta slovenski standard je istoveten z: prEN 12697-13
ICS:
93.080.20 Materiali za gradnjo cest Road construction materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2025
ICS 93.080.20 Will supersede EN 12697-13:2017
English Version
Bituminous mixtures - Test methods - Part 13:
Temperature measurement
Mélanges Bitumineux - Méthodes dessai - Partie 13: Asphalt - Prüfverfahren - Teil 13: Temperaturmessung
Mesure de la température
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 227.
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
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12697-13:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 4
4.1 Contact Temperature Measuring Thermometer . 4
4.2 Infrared-thermometer . 4
5 Apparatus . 4
5.1 Contact temperature measuring device . 4
5.2 Infrared-thermometer . 5
6 Procedure . 5
6.1 Contact Measuring Device. 5
6.1.1 Conditioning of instrument . 5
6.1.2 Measurement of temperature in a lorry . 5
6.1.3 Measurement material temperature after it has been laid and before or during rolling . 5
6.1.4 Measurements of temperature in a heap . 5
6.2 Infrared-thermometer . 6
6.2.1 General. 6
6.2.2 Comparison measurement . 6
6.2.3 Temperature measurement . 6
7 Test Report . 7
8 Precision . 7

European foreword
This document (prEN 12697-13:2024) has been prepared by Technical Committee CEN/TC 227 “Road
materials”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12697-13:2017.
EN 12697-13:2017:
— [ 5.1], (3.1.1 and 3.1.2 in EN 12697-13:2017), the wording: “The temperature measuring device shall
have the capacity to measure the temperature with an accuracy of ± 2 °C”, amended to read: “The
contact temperature measuring device shall be capable to measure the temperature to the nearest 1
°C with a maximum permissible error of 2 °C.”;
— [Clause 7], (Clause 5 in EN 12697-13:2017), information to be reported amended.
A list of all parts in the EN 12697 series, published under general title Bituminous mixtures - Test methods
can be found on the CEN website: https://www.cencenelec.eu/.
1 Scope
This document describes a test method for measuring the temperature of asphalt mixtures after mixing
and during storage, transportation and laying. This document includes the contact temperature-
measuring device and the non-contact temperature-measuring device (infrared-thermometer). In cases
of dispute, the refence method shall be using the contact temperature measuring device.
2 Normative references
There are no
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