SIST EN 12697-52:2017
(Main)Bituminous mixtures - Test methods - Part 52: Conditioning to address oxidative ageing
Bituminous mixtures - Test methods - Part 52: Conditioning to address oxidative ageing
This European Standard describes two sets of procedures for conditioning of bituminous mixtures in terms of oxidative ageing. Procedures A.1 and A.2 can be applied on loose bituminous mixture before compaction of specimens, procedures B.1 and B.2 on compacted specimens. Material conditioned by this European Standard can be used for further testing to assess the effect of oxidative ageing on characteristics of bituminous mixtures and thus on their durability and recyclability. Alternatively, binder can be extracted from conditioned mixture to assess the effect of oxidative ageing on binder characteristics taking into account potential effects of mineral aggregates on ageing.
This European Standard is applicable to bituminous mixtures manufactured in the laboratory or in a mixing plant. Procedures B.1 and B.2 is applicable to specimens from laboratory production or cores taken from the field.
Asphalt - Prüfverfahren - Teil 52: Konditionierung, um der oxidativen Alterung Rechnung zu tragen
Diese Technische Spezifikation gibt zwei Verfahrenssätze zur Konditionierung von Asphalt an, um der oxidativen Alterung Rechnung zu tragen. Die Verfahren A.1 und A.2 sind auf den losen Asphalt vor der Verdichtung der Probekörper, die Verfahren B.1 und B.2 auf verdichtete Probekörper anwendbar. Nach dieser Technischen Spezifikation konditioniertes Material kann für weitere Prüfungen zur Beurteilung des Einflusses der oxidativen Alterung auf die Eigenschaften von Asphalt und daher zur Beurteilung von dessen Dauerhaftigkeit und Recyclingfähigkeit verwendet werden. Alternativ kann das Bindemittel aus dem konditionierten Asphalt extrahiert werden, um den Einfluss der oxidativen Alterung auf die Eigenschaften der Bindemittel zu beurteilen, wobei potenzielle Einflüsse von Gesteinskörnungen auf die Alterung berücksichtigt werden.
Diese Technische Spezifikation gilt sowohl für im Labor hergestellten Asphalt als auch für Asphalt, der in einer Mischanlage hergestellt wird. Die Verfahren B.1 und B.2 gelten sowohl für im Labor hergestellte Probekörper als auch für vor Ort entnommene Proben.
Mélange bitumineux - Méthodes d'essai - Partie 52 : Conditionné pour traiter le vieillissement oxydatif
La présente Spécification Technique décrit deux ensembles de procédures pour le conditionnement de mélanges bitumineux pour le vieillissement par oxydation. Les Procédures A.1 et A.2 peuvent être appliquées sur mélange bitumineux foisonné avant compactage des éprouvettes, tandis que les Procédures B.1 et B.2 s'appliquent aux éprouvettes compactées. Les matériaux conditionnés selon la présente Spécification Technique peuvent être utilisés pour d'autres essais afin d'évaluer l'effet du vieillissement par oxydation sur les caractéristiques des mélanges bitumineux, ainsi que sur leur durabilité et recyclabilité. Eventuellement, le liant peut être extrait du mélange conditionné afin d'évaluer l'effet du vieillissement par oxydation sur les caractéristiques du liant en tenant compte des effets possibles de la minéralogie des granulats sur le vieillissement.
La présente Spécification Technique s'applique aux mélanges bitumineux fabriqués en laboratoire ou en centrale. Les Procédures B.1 et B.2 s'appliquent aux éprouvettes fabriquées en laboratoire ou prélevées sur le terrain.
Bitumenske zmesi - Preskusne metode - 52. del: Kondicioniranje za zagotovitev oksidativnega staranja
Ta evropski standard opisuje dva sklopa postopkov za kondicioniranje bitumenskih zmesi v smislu oksidativnega staranja. Postopka A.1 in A.2 je mogoče uporabljati na mehki bitumenski zmesi pred zgoščevanjem preskusnih vzorcev, postopka B.1 in B.2 na zgoščenih preskusnih vzorcih. Material, pogojen s tem evropskim standardom, je mogoče uporabiti za nadaljnje preskušanje za oceno učinka oksidativnega staranja na lastnosti bitumenskih zmesi in s tem na njihovo trajnost in možnost recikliranja. Mogoče pa je pridobiti vezivo iz kondicionirane zmesi, da bi ocenili učinek oksidativnega staranja na lastnosti veziva ob upoštevanju morebitnih učinkov kamnitih zrn na staranje.
Ta evropski standard se uporablja za bitumenske zmesi, izdelane v laboratoriju ali mešalni napravi. Postopka B.1 in B.2 se uporabljata za preskusne vzorce iz laboratorijske proizvodnje ali jeder, vzetih na terenu.
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Bitumenske zmesi - Preskusne metode - 52. del: Kondicioniranje za zagotovitev oksidativnega staranjaAsphalt - Prüfverfahren - Teil 52: Konditionierung, um der oxidativen Alterung Rechnung zu tragenMélange bitumineux - Méthodes d'essai - Partie 52 : Conditionné pour traiter le vieillissement oxydatifBituminous mixtures - Test methods - Part 52: Conditioning to address oxidative ageing93.080.20Materiali za gradnjo cestRoad construction materialsICS:Ta slovenski standard je istoveten z:CEN/TS 12697-52:2017SIST EN 12697-52:2017en,fr,de01-oktober-2017SIST EN 12697-52:2017SLOVENSKI
STANDARD
SIST EN 12697-52:2017
TECHNICAL SPECIFICATION SPÉCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION
CEN/TS 12697-52
July
t r s y ICS
{ uä r z rä t r English Version
Bituminous mixtures æ Test methods æ Part
w tã Conditioning to address oxidative ageing Mélanges bitumineux æ Méthodes d 5essai æ Partie
w t ã Conditionnement pour l 5obtention d 5un vieillissement par oxydation
Asphalt æ Prüfverfahren æ Teil
w tã Konditionierungá um der oxidativen Alterung Rechnung zu tragen
May
t r s y for provisional applicationä
hree yearsä After two years the members of CEN will be requested to
available promptly at national level in an appropriate formä It is permissible to keep conflicting national standards in force 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:
Avenue Marnix 17,
B-1000 Brussels
9
t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä SIST EN 12697-52:2017
CEN/TS 12697-52:2017 (E) 2 Contents Page European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions . 5 4 Principle . 5 5 Procedure A — Conditioning of loose asphalt mixture . 5 5.1 Apparatus . 5 5.2 Procedure. 6 5.2.1 General . 6 5.2.2 Preparation . 6 5.2.3 Conditioning for short-term ageing potential (Procedure A.1) . 6 5.2.4 Conditioning for long-term ageing potential (Procedure A.2) . 7 5.3 Test report . 7 6 Procedure B — Conditioning of compacted asphalt mixture specimens . 8 6.1 Apparatus . 8 6.2 Conditioning at ambient air (Procedure B.1) . 9 6.2.1 Procedure. 9 6.2.2 Test Report . 10 6.3 Conditioning under forced flow with gaseous oxidant (Procedure B.2) . 10 6.3.1 Procedure. 10 6.3.2 Test report . 12 Bibliography . 14
SIST EN 12697-52:2017
CEN/TS 12697-52:2017 (E) 3 European foreword This document (CEN/TS 12697-52:2017) has been prepared by Technical Committee CEN/TC 227 “Road material”, the secretariat of which is held by DIN. 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. 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 announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. SIST EN 12697-52:2017
CEN/TS 12697-52:2017 (E) 4 1 Scope This Technical Specification specifies two sets of procedures for conditioning of bituminous mixtures in terms of oxidative ageing. Procedures A.1 and A.2 can be applied on loose bituminous mixture before compaction of specimens, procedures B.1 and B.2 on compacted specimens. Material conditioned by this Technical Specification can be used for further testing to assess the effect of oxidative ageing on characteristics of bituminous mixtures and thus on their durability and recyclability. Alternatively, binder can be extracted from conditioned mixture to assess the effect of oxidative ageing on binder characteristics taking into account potential effects of mineral aggregates on ageing. This Technical Specification is applicable to bituminous mixtures manufactured in the laboratory or in a mixing plant. Procedures B.1 and B.2 is applicable to specimens from laboratory production or samples taken from the field. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12697-3, Bituminous mixtures - Test methods for hot mix asphalt - Part 3: Bitumen recovery: Rotary evaporator EN 12697-4, Bituminous mixtures - Test methods - Part 4: Bitumen recovery: Fractionating column EN 12697-5, Bituminous mixtures - Test methods for hot mix asphalt - Part 5: Determination of the maximum density EN 12697-6, Bituminous mixtures - Test methods for hot mix asphalt - Part 6: Determination of bulk density of bituminous specimens EN 12697-8, Bituminous mixtures - Test methods for hot mix asphalt - Part 8: Determination of void characteristics of bituminous specimens EN 12697-18, Bituminous mixtures - Test methods - Part 18: Binder drainage EN 12697-27, Bituminous mixtures - Test methods - Part 27: Sampling EN 12697-29, Bituminous mixtures - Test method for hot mix asphalt - Part 29: Determination of the dimensions of a bituminous specimen EN 12697-30, Bituminous mixtures - Test methods for hot mix asphalt - Part 30: Specimen preparation by impact compactor EN 12697-31, Bituminous mixtures - Test methods for hot mix asphalt - Part 31: Specimen preparation by gyratory compactor EN 12697-32, Bituminous mixtures - Test methods for hot mix asphalt - Part 32: Laboratory compaction of bituminous mixtures by vibratory compactor EN 12697-33, Bituminous mixtures - Test methods
- Part 33: Specimen prepared by roller compactor EN 12697-35, Bituminous mixtures - Test methods - Part 35: Laboratory mixing SIST EN 12697-52:2017
CEN/TS 12697-52:2017 (E) 5 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 ageing alteration of asphalt mixtures over time due to the superposed impact of different environmental conditions (e.g. oxygen, other oxidation agents, UV and moisture) that lead to altering characteristics of the binder, additive and aggregate component over time Note 1 to entry: Changes in binder characteristics are mainly increasing stiffness and brittleness leading to increased risk of low-temperature and fatigue cracking of asphalt mixtures. Impacts of fine and coarse aggregates on the ageing behaviour of asphalt mixtures are still topic of scientific discussion. Ageing can be divided into short-term ageing (STA) during production and compaction of asphalt mixtures and asphalt layers and into long-term ageing (LTA) of compacted pavement layers over the years. 3.2 asphalt durability maintenance of the structural integrity of compacted material over its expected service-life when exposed to the effects of the environment (water, oxygen, sunlight,…) and traffic loading 3.3 pavement durability retention of a satisfactory level of performance over the structure’s expected service-life without major maintenance for all properties that are required for the particular road situation in addition to asphalt durability 4 Principle One of two sets of methods is used for asphalt mixture conditioning. In the first set of methods (Procedures A.1 and A.2), loose asphalt mixture is conditioned. The loose mixture is placed into a pan and conditioned within a heating cabinet with forced air ventilation for a specific duration at elevated temperature to accelerate ageing due to oxidation. Additionally pressure can be applied for further acceleration of conditioning. Procedure A.1 address the short-term ageing potential, procedure A.2 the long-term ageing potential. In the second set of methods (Procedures B.1 and B.2) compacted specimens from bituminous mixtures prepared in the laboratory or coming from the plant or samples from the field are conditioned. Two options for conditioning are available. Either specimens are placed into a pan and conditioned within a heating cabinet with forced air ventilation for a specific duration at a specific temperature (Procedure B.1), or specimens are placed within a triaxial cell (comparable to triaxial cells used for permeability tests on soils) and a forced flow of gaseous oxidant agent (ozone enriched compressed air) through the specimen is used to condition the specimen for a specific duration at a specific temperature (Procedure B.2). NOTE Methods B.1 and B.2 result in different results in subsequent testing of conditioned specimens or extracted binder. 5 Procedure A — Conditioning of loose asphalt mixture 5.1 Apparatus 5.1.1 One or more pans with dimensions large enough to ensure that the loose mixture can be spread on it with a thickness of the mixture of up to 60 mm. SIST EN 12697-52:2017
CEN/TS 12697-52:2017 (E) 6 To increase the oxidative ageing effect by enhanced air flow through the mixture, a pan with a perforated plate with a maximum mesh size of 0,7 mm can be applied. 5.1.2 Heating cabinet with forced air ventilation able to maintain the conditioning temperature with an accuracy of ± 1 °C. 5.1.3 Thermometer, capable of measuring temperatures from room temperature to 180 °C, readable to 1 °C with an accuracy of ± 0,5 °C. 5.1.4 Watch or timer, accurate and readable to 1 min. 5.1.5 In the case of conditioning of loose mixture by applying temperature and pressure, a device able to maintain the conditioning temperature and pressure with an accuracy of ± 1 °C for the temperature and of ± 100 kPa for the pressure. NOTE The Pressure Ageing Vessel (PAV) as described in EN 14769 meets the requirements for conditioning of loose mixture under temperature and pressure. 5.2 Procedure 5.2.1 General Procedure A.1 (for short-term ageing) shall not be applied on loose mix coming from the field as this step has already been taken in the mixing plant. 5.2.2 Preparation Prepare the bituminous mixture according to EN 12697-35, or take samples from the production of a plant according to EN 12697-27. Determine the maximum density according to EN 12697-5. Preheat the device in which the mixture is to be conditioned and the pan to the conditioning temperature for at least 60 min. 5.2.3 Conditioning for short-term ageing potential (Procedure A.1) Fill the loose mixture into the pan and spread it so that a homogeneous layer of mixture with a thickness of (25 ± 5) mm is in the pan. Before placing the pan in the conditioning device, allow the mixture to cool down to the set conditioning temperature. Use the thermometer to check the mixture temperature regularly. When the mixture has reached the conditioning temperature, place the pan into the conditioning device. Condition the mixture for the set conditioning time ± 10 min, keeping temperature and pressure within accuracy limits. To reduce the danger of binder drainage, it is recommended to carry out preliminary tests according to EN 12697-18 at the desired conditioning temperature to analyse whether binder drainage occurs. If so, lower the temperature until no binder drainage occurs. Thicknesses between 25 mm and 60 mm are generally used for the loose mix to put in place. To maintain a uniform conditioning it is recommended to stir the mixture at regular time intervals so as to avoid segregation, e.g. each 48 hour. NOTE The method for short-term ageing of laboratory prepared asphalt mixtures suggested by SHRP-A-383 [1] report sets a conditioning temperature of 135 °C for 4 h. SIST EN 12697-52:2017
CEN/TS 12697-52:2017 (E) 7 After conditioning: — the mixture is compacted to specimens according to EN 12697-30, EN 1269731, EN 1269732, or EN 1269733 for testing of mixture characteristics after conditioning; or — the binder is extracted from the mixture according to EN 12697-3 or EN 126974 for testing of binder characteristics after mixture conditioning. — the mixture is further conditioned for long-term ageing according to 5.2.4. 5.2.4 Conditioning for long-term ageing potential (Procedure A.2) Only mixture prepared in the laboratory and conditioned according to 5.2.3 (short-term ageing) or mixture coming from a mixing plant shall be further conditioned to long-term ageing as described within this clause. Fill the loose mixture into the pan and spread it so that a homogeneous layer of mixture with a thickness of (25 ± 5) mm is in the pan. Before placing the pan in the conditioning device, allow the mixture to cool down to the set conditioning temperature. Use the thermometer to check the mixture temperature regularly. When the mixture has reached the conditioning temperature, place the pan into the conditioning device. Condition the mixture for the set conditioning time ± 0,5 h, keeping temperature and pressure within accuracy limits. To reduce the danger of binder drainage, it is recommended to carry out preliminary tests according to EN 12697-18 at the desired conditioning temperature to analyse whether binder drainage occurs.
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