SIST EN 12697-40:2020

Bituminous mixtures - Test methods - Part 40: In situ drainability

This document describes a method to determine the in situ relative hydraulic conductivity, at specific locations, of a road surfacing that is designed to be permeable. An estimate of the average value for the surfacing is obtained from the mean value of a number of determinations on each section of road.
The test measures the ability to drain water (drainability) achieved in situ of a surfacing. As such, it can be used as a compliance check to ensure that a permeable surface course has the required properties when it is laid. The test can also be used subsequently to establish the change of drainage ability with time.
For the test to be valid, the surface of the test area should be clean and free from detritus. Measurements can be made when a road is either wet or dry, but not if it is in a frozen state.

Asphalt - Prüfverfahren - Teil 40: In-situ-Durchlässigkeit

Dieses Dokument beschreibt ein Verfahren zur Bestimmung der relativen In-situ-Wasserdurchlässigkeit an festgelegten Punkten einer als wasserdurchlässig ausgelegten Deckschicht. Eine Abschätzung des durchschnittlichen Wertes (der Wasserdurchlässigkeit) der Deckschicht erfolgt durch den Mittelwert aus einer Anzahl von Bestimmungen in jedem Teilstück der betreffenden Straße.
Mit dieser Prüfung wird die Drainagefähigkeit (Durchlässigkeit) der eingebauten Deckschicht gemessen. Als solche kann sie als Nachweis verwendet werden, dass eine durchlässige Deckschicht nach dem Einbau die geforderten Eigenschaften hat. Die Prüfung kann auch später durchgeführt werden, um die Änderung der Durchlässigkeit mit der Zeit zu ermitteln.
Damit die Prüfung gültig ist, sollte die Oberfläche des Prüfbereiches sauber und frei von losen Bestandteilen sein. Die Messungen können entweder bei nasser oder bei trockener Straße, nicht jedoch bei Frost durchgeführt werden.

Mélanges bitumineux - Méthodes d'essai - Partie 40 : Perméabilité en place

Ce document décrit une méthode permettant de déterminer la conductivité hydraulique relative in-situ, à certains endroits spécifiques d’un revêtement routier conçu pour être drainant. Une estimation de la valeur moyenne pour le revêtement est obtenue à partir de la valeur moyenne d’un certain nombre de déterminations sur chaque section de route.
L’essai sert à mesurer in-situ la capacité à drainer l’eau (drainabilité) d’un revêtement. En tant que tel, il peut être utilisé comme contrôle de conformité afin de garantir qu’une couche de surface drainante a les propriétés requises lors de la mise en œuvre. L’essai peut également servir ultérieurement à établir les variations de la capacité drainante avec le temps.
Pour que l’essai soit valable, il est recommandé que la surface de la zone d’essai soit propre et exempte de détritus. Les mesurages peuvent être effectués sur route sèche ou mouillée, mais pas sur route gelée.

Bitumenske zmesi - Preskusne metode - 40. del: Prepustnost vgrajene plasti (in situ)

General Information

• Status: Published
• Public Enquiry End Date: 19-Feb-2019
• Publication Date: 01-Apr-2020
• ICS: 93.080.20 - Road construction materials
• Technical Committee: CES - Roads
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 05-Mar-2020
• Due Date: 10-May-2020
• Completion Date: 02-Apr-2020
• Ref Project: EN 12697-40:2020 - Bituminous mixtures - Test methods - Part 40: In situ drainability

Relations

• Replaces: SIST EN 12697-40:2012 - Bituminous mixtures - Test methods for hot mix asphalt - Part 40: In situ drainability
• Effective Date: 01-May-2020

Overview

The SIST EN 12697-40:2020 standard, developed by CEN, specifies a test method for determining the in situ drainability of bituminous mixtures used in road surfacing. This test evaluates the relative hydraulic conductivity of permeable road surfaces at specific locations, measuring how effectively water drains through the pavement. Assessing in situ drainability is crucial for ensuring that permeable surfaces meet designed permeability requirements and for monitoring the change of drainage ability over time.

The standard supersedes the 2012 edition and extends applicability beyond hot mix asphalt to other bituminous mixtures. This reliable and standardized approach supports compliance checking, helps optimize road performance, and guides maintenance decision-making based on drainage characteristics.

Key Topics

• Purpose and Scope
  SIST EN 12697-40:2020 focuses on determining the hydraulic conductivity of permeable road surfaces by measuring water outflow through the surface. It calculates an average value of relative hydraulic conductivity from several measurements on a road section.

• Test Principles
  The test utilizes a radial-flow falling head permeameter placed on the pavement, measuring the time for 4 liters of water to flow through a defined annular area. The reciprocal of this outflow time, adjusted for apparatus resistance, yields the relative hydraulic conductivity.

• Apparatus Requirements
  The permeameter is a specialized device with calibrated dimensions for consistent results. Key components include:

  • Transparent acrylic standpipe for water level observation
  • Rubber ball plunger and sponge rubber base for watertight seal
  • Stopwatch with 0.1-second accuracy (preferably sensor-activated)
  • Standing board to uniformly apply pressure on the surface

• Test Procedure
  Measurements are made at ten marked locations spaced along the pavement width. The permeameter is loaded with clean water, air bubbles are removed, and water outflow times are recorded twice per location. The average outflow times are used in calculations.

• Calculations & Reporting
  The relative hydraulic conductivity is calculated by subtracting the series resistance time from the average outflow time and then taking the reciprocal. The test report must document site conditions, ambient temperature, test equipment details, load applied, individual results, and the final conductivity value.

• Limitations
  Tests must be performed on clean, unfrozen surfaces and can be conducted whether the surface is dry or wet. Precision data for this method are yet to be established.

Applications

SIST EN 12697-40:2020 is essential for stakeholders involved in the design, construction, and maintenance of permeable bituminous pavements, including:

• Road construction professionals requiring compliance verification of permeable surface layers.
• Infrastructure asset managers monitoring the long-term drainage performance and degradation of permeable road surfaces.
• Transport authorities and environmental engineers aiming to reduce surface runoff and promote sustainable urban drainage.
• Quality control laboratories conducting standardized hydraulic conductivity assessments on-site.

By employing this standard, organizations can ensure road surfaces meet permeability specifications that help prevent water accumulation, improve driving safety, and promote environmental sustainability through reduced runoff.

Related Standards

• EN 13036-1 - Measurement of pavement surface macrotexture depth, complementing hydraulic conductivity assessments by evaluating texture influencing drainage.
• Other parts of the EN 12697 series - Covering bituminous mixture test methods to assess properties like stiffness, stability, and durability.
• International standards for permeability and hydraulic conductivity measurement methods in pavement engineering, for cross-referencing and extended quality assurance.

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Keywords: SIST EN 12697-40:2020, in situ drainability, bituminous mixtures, road surface permeability, hydraulic conductivity, permeable pavement testing, CEN standard, pavement drainage, permeameter test method, road construction materials.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2020
Nadomešča:
SIST EN 12697-40:2012
Bitumenske zmesi - Preskusne metode - 40. del: Prepustnost vgrajene plasti (in
situ)
Bituminous mixtures - Test methods - Part 40: In situ drainability
Asphalt - Prüfverfahren - Teil 40: In-situ-Durchlässigkeit
Mélanges bitumineux - Méthodes d'essai - Partie 40 : Perméabilité en place
Ta slovenski standard je istoveten z: EN 12697-40:2020
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.

EN 12697-40
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2020
EUROPÄISCHE NORM
ICS 93.080.20
English Version
Bituminous mixtures - Test methods - Part 40: In situ
drainability
Mélanges bitumineux - Méthodes d'essai - Partie 40 : Asphalt - Prüfverfahren - Teil 40: In-situ-
Perméabilité en place Durchlässigkeit
This European Standard was approved by CEN on 18 November 2019.

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. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists 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, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12697-40:2020 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 . 5
5 Apparatus . 5
5.1 Permeameter . 5
5.2 Standing board . 7
5.3 Stopwatch . 7
5.4 Thermometer . 7
5.5 Water . 7
6 Procedure. 7
6.1 Calibration . 7
6.2 Locations . 7
6.3 Measurement at each location . 8
7 Calculation . 8
8 Report . 9
9 Precision . 9
Annex A (normative) Apparatus calibration . 10
A.1 Application . 10
A.2 Volume calibration . 10
A.3 Series resistance time, r . 10
A.4 Parallel leakage time . 10
Bibliography . 12
European foreword
This document (EN 12697-40:2020) has been prepared by Technical Committee CEN/TC 227 “Road
materials”, the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by August 2020, and conflicting national standards shall
be withdrawn at the latest by August 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 12697-40:2012.
The following is a list of significant technical changes since the previous edition:
— the title no longer makes the method exclusively for hot mix asphalt;
— [ge] editorial update according to current standard template;
— [ge] symbol for litre, “L” amended to l;
— [6.3.8] NOTE modified according to ISO/IEC Directives – Part 2:2016, 24.5;
— [Clause 8] Test report: bullet a) completed with ambient temperature.
A list of all parts in the EN 12697 series can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations of the
following countries are bound to implement this European Standard: 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, Turkey and the
United Kingdom.
1 Scope
This document describes a method to determine the in situ relative hydraulic conductivity, at specific
locations, of a road surfacing that is designed to be permeable. An estimate of the average value for the
surfacing is obtained from the mean value of a number of determinations on each section of road.
The test measures the ability to drain water (drainability) achieved in situ of a surfacing. As such, it can
be used as a compliance check to ensure that a permeable surface course has the required properties
when it is laid. The test can also be used subsequently to establish the change of drainage ability with
time.
For the test to be valid, the surface of the test area should be clean and free from detritus.
Measurements can be made when a road is either wet or dry, but not if it is in a frozen state.
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 13036-1, Road and airfield surface characteristics — Test methods — Part 1: Measurement of
pavement surface macrotexture depth using a volumetric patch technique
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp/ui
3.1
outflow time
time (s) that elapses for an outflow of 4,0 l through the permeameter, between the meniscus at the 5 l
mark and when it falls to the 1 l mark
3.2
series resistance time
r
outflow time (s) that is determined when the permeameter is located so the outlet is clear of any
surfacing that could impede the exit of out-flowing water
Note 1 to entry: The method for calculating the series resistance time is given in Annex A.
Note 2 to entry: The series resistance time is subtracted from measurements of outflow time when the
permeameter is used on a surfacing of a pavement.
3.3
parallel leakage time
outflow time when the outlet is restricted by an impermeable surface
EN 12697-40:20
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