EN 12274-4:2018

Slurry surfacing - Test methods - Part 4: Determination of cohesion of the mix

This European Standard specifies a test method for determining the minimum cohesion of a slurry surfacing mixture, which enables the set time and trafficability time to be determined.
This European Standard applies to slurry surfacing to be used in surface layers for roads, airfields and other trafficked areas.

Dünne Asphaltdeckschichten in Kaltbauweise - Prüfverfahren - Teil 4: Bestimmung der Kohäsion von Bitumenschlämmen

Diese Europäische Norm legt ein Prüfverfahren zur Bestimmung der Mindestkohäsion einer Mischung für Bitumenschlämmen (einschließlich Dünner Asphaltdeckschichten in Kaltbauweise) fest, anhand dessen die Brechzeit und die Verkehrsfreigabezeit bestimmt werden können.
Diese Europäische Norm gilt für Bitumenschlämmen und Dünne Asphaltdeckschichten in Kaltbauweise, die als Deckschichten für Straßen, Flugplätze und andere Verkehrsflächen verwendet werden.

Matériaux bitumineux coulés à froid - Méthode d'essai - Partie 4 : Détermination de la cohésion du mélange

La présente Norme européenne spécifie une méthode d'essai pour déterminer la cohésion minimale d'un mélange de matériaux bitumineux coulés à froid pour permettre d'en connaître le temps de prise et le délai de remise en circulation.
La présente Norme européenne s'applique aux matériaux bitumineux coulés à froid utilisés pour les revêtements des routes, terrains d'aviation et autres zones de trafic.

Tankoplastne prevleke po hladnem postopku - Preskusne metode - 4. del: Ugotavljanje kohezije zmesi

Ta evropski standard določa preskusno metodo za ugotavljanje minimalne kohezije površinskih zmesi redke malte, ki omogoča določiti čas, ki je potreben za strjevanje in čas, po katerem bo površina prehodna.
Ta evropski standard velja za površine iz redke malte (vključno z mikro prevlekami) za uporabo na cestah, letališčih in drugih prometnih površinah.

General Information

• Status: Published
• Publication Date: 27-Mar-2018
• Withdrawal Date: 29-Sep-2018
• ICS: 93.080.20 - Road construction materials
• Technical Committee: CEN/TC 227 - Road materials
• Drafting Committee: CEN/TC 227/WG 2 - Surface dressing and slurry surfacing
• Current Stage: 9093 - Decision to confirm - Review Enquiry
• Start Date: 29-Jul-2024
• Completion Date: 14-Apr-2025
• Ref Project: SIST EN 12274-4:2018 - Slurry surfacing - Test methods - Part 4: Determination of cohesion of the mix

Relations

• Replaces: EN 12274-4:2003 - Slurry surfacing - Test methods - Part 4: Determination of cohesion of the mix
• Effective Date: 04-Apr-2018

Overview

EN 12274-4:2018 (CEN) specifies a laboratory test method to determine the minimum cohesion of a slurry surfacing mixture. The measured cohesion is used to establish the slurry’s set time and trafficability time, key performance indicators for slurry surfacing applied to roads, airfields and other trafficked areas. This standard is part of the EN 12274 series for slurry surfacing test methods.

Key topics and technical requirements

• Scope and purpose: Defines a repeatable procedure to assess when a slurry surfacing mix has irreversibly set (coalesced) and when it can accept traffic.
• Materials covered: Coarse and fine aggregates, reactive fillers (e.g., cement/lime), and bitumen emulsion. Aggregates/filler are dried to constant mass at (110 ± 5) °C when required.
• Sample preparation:
  • Work under normal laboratory conditions (ambient 18–28 °C).
  • Mix aggregates, filler, water/additives and emulsion to a homogeneous batch.
  • Cast samples into square metal moulds (Types A–D sized to maximum aggregate) mounted on roofing felt and allow to set.
• Apparatus:
  • Cohesion tester with a rubber foot (hardness (55 ± 5) IRHD per ISO 48), pneumatic cylinder and torque meter (capable of ≥ 3.5 Nm, ±0.1 Nm).
  • Air supply (for pneumatic devices) minimum 700 kPa.
  • Oven, balances, timing devices and calibrated moulds.
• Calibration: Annual (or as required) calibration using graded fine aggregate and P220/P100 silicon carbide sandpapers (ISO 6344-2); polish rubber foot then confirm constant readings.
• Test procedure: Torque measurements are taken on identical samples at set intervals (typically between 5 and 120 minutes after casting). Results record torque vs. time and visual condition of samples; note that for some mixes precision may be affected by aggregate loss or uneven surface.
• Changes from previous edition: Removed mandatory five-sample requirement (producer can specify number), increased drying temperature to 110 °C, added automatic device option, clarified precision/reporting.

Applications and users

• Practical use: Determine set time and trafficability time for slurry surfacing mixes used in maintenance overlays, wearing courses and rapid-repair applications.
• Typical users:
  • Road materials laboratories and quality control teams
  • Pavement engineers and contractors specifying slurry surfacing mixes
  • Airport maintenance units and municipal pavement authorities
  • Material producers creating method statements for slurry products

Related standards

EN 12274 series (slurry surfacing test methods), notably:

• EN 12274-1 Sampling
• EN 12274-2 Residual binder content
• EN 12274-3 Consistency
• EN 12274-5 Minimum binder content and wearing resistance
• EN 12274-6 Rate of application
• EN 12274-7 Shaking abrasion test
• EN 12274-8 Visual assessment

Keywords: EN 12274-4:2018, slurry surfacing, cohesion test, set time, trafficability time, cohesion tester, slurry surfacing mix, road construction materials, CEN.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Tankoplastne prevleke po hladnem postopku - Preskusne metode - 4. del: Ugotavljanje kohezije zmesiDünne Asphaltschichten in Kaltbauweise - Prüfverfahren - Teil 4: Bestimmung der Kohäsion von SchlämmenMatériaux bitumineux coulés à froid - Méthode d'essai - Partie 4 : Détermination de la cohésion du mélangeSlurry surfacing - Test methods - Part 4: Determination of cohesion of the mix93.080.20Materiali za gradnjo cestRoad construction materialsICS:Ta slovenski standard je istoveten z:EN 12274-4:2018SIST EN 12274-4:2018en,fr,de01-maj-2018SIST EN 12274-4:2018SLOVENSKI
STANDARDSIST EN 12274-4:20041DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 12274-4
March
t r s z ICS
{ uä r z rä t r Supersedes EN
s t t y væ vã t r r uEnglish Version
Slurry surfacing æ Test methods æ Part
vã Determination of cohesion of the mix Matériaux bitumineux coulés à froid æ Méthode d 5essai æ Partie
vã Détermination de la cohésion du mélange
Dünne Asphaltdeckschichten in Kaltbauweise æ Prüfverfahren æ Teil
vã Bestimmung der Kohäsion von Bitumenschlämmen This European Standard was approved by CEN on
s u November
t r s yä
egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä
translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä
CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä
EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Rue de la Science 23,
B-1040 Brussels
t r s z CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN
s t t y væ vã t r s z ESIST EN 12274-4:2018

Page European foreword . 3 1 Scope . 5 2 Normative references . 5 3 Terms and definitions . 5 4 Principle . 6 5 Materials . 6 5.1 Coarse aggregates and fine aggregates . 6 5.2 Reactive filler . 6 5.3 Emulsion . 6 6 Apparatus . 6 6.1 Apparatus used for preparation of samples . 6 6.2 Apparatus used for testing. 9 6.2.1 Cohesion tester . 9 6.2.2 Air supply, of 700 kPa minimum for pneumatic device only . 9 7 Calibration of test apparatus (Cohesion Tester) . 11 7.1 Materials . 11 7.2 Procedure for calibration . 11 8 Preparation of sample . 12 8.1 Temperature . 12 8.2 Water . 12 8.3 Aggregates and filler . 12 8.4 Water and additive . 12 8.5 Preparation of the mix . 13 8.6 Sample size . 13 8.7 Curing . 13 9 Test procedure . 13 10 Expression of results . 14 11 Test report . 14 12 Precision . 15
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