1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12697-3:2013Bituminous mixtures Testmethods for hot mix asphaltPart 3: Bitumen recovery: Rotary evaporatorBS EN 12697-3:2013 BRITISH STANDARDNational forewordThis British S
2、tandard is the UK implementation of EN 12697-3:2013.It supersedes BS EN 12697-3:2005 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/510/1, Asphalt products.A list of organizations represented on this committee can beobtained on request to its secreta
3、ry.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 80222 5ICS 93.080.20Compliance with a British Standard cannot conf
4、er immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2013.Amendments issued since publicationDate Text affectedBS EN 12697-3:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12697-3 May 2013 ICS 93.
5、080.20 Supersedes EN 12697-3:2005English Version Bituminous mixtures - Test methods for hot mix asphalt - Part 3: Bitumen recovery: Rotary evaporator Mlanges Bitumineux - Mthodes dessai pour enrobs chaud - Partie 3: Extraction des bitumes lvaporateur rotatif Asphalt - Prfverfahren fr Heiasphalt - Te
6、il 3: Rckgewinnung des Bindemittels: Rotationsverdampfer This European Standard was approved by CEN on 28 March 2013. 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 a
7、ny 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 langu
8、age 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
9、, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FO
10、R STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12697-3:2013: EBS EN 12697-3:2013EN 12697-3:2
11、013 (E) 2 Contents Page Foreword 3 1 Scope 7 2 Normative references 7 3 Terms and definitions .7 4 Principle 7 5 Apparatus .7 5.1 Apparatus for the extraction of the soluble bitumen .7 5.2 Apparatus for the clarification of the bitumen solution.8 5.3 Distillation apparatus 8 6 Solvent and other mate
12、rials 9 7 Procedure .9 7.1 Extraction of the bitumen and removal of insoluble matter 9 7.2 Assembling the apparatus . 10 7.3 Distillation procedure . 10 8 Preparation of the bitumen for testing . 12 9 Test report . 12 10 Precision 13 Bibliography . 15 BS EN 12697-3:2013EN 12697-3:2013 (E) 3 Foreword
13、 This document (EN 12697-3:2013) has been prepared by Technical Committee CEN/TC 227 “Road materials”, the secretariat of which is held by DIN. 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 Nove
14、mber 2013, and conflicting national standards shall be withdrawn at the latest by November 2013. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such pate
15、nt rights. This document supersedes EN 12697-3:2005. The significant changes from that document include: The Scope is clarified. The definitions for precision and associated terms have been removed. Remaining solvent is redefined as solvent residue. The minimum evaporation capacity of solvent has be
16、en reduced from 1,0 l/h to 0,85 l/h. The container no longer has to be made of glass. The warning note about solvent is clarified. Silicon grease is permitted as a seal. Silica gel has been corrected. Pouring of bitumen solution has been edited. Ash content reference to EN 12697-1 has been corrected
17、. Maximum time for bitumen recovery distillation is reduced. Check for air leaks has been removed. First phase temperature and second phase pressure with dichloromethane has been changed. The minimum final pressure has been made relevant to first phase pressure instead of fixed value for all solvent
18、s. The use of nitrogen to prevent the bitumen from ageing has been added. The note on expected time for distillation has been removed. This part of EN 12697, Bituminous mixtures Test methods for hot mix asphalt, is one of a series of standards as listed below: Part 1: Soluble binder content BS EN 12
19、697-3:2013EN 12697-3:2013 (E) 4 Part 2: Determination of particle size distribution Part 3: Bitumen recovery: Rotary evaporator Part 4: Bitumen recovery: Fractionating column Part 5: Determination of the maximum density Part 6: Determination of bulk density of bituminous specimens Part 7: Determinat
20、ion of bulk density of bituminous specimens by gamma rays Part 8: Determination of void characteristics of bituminous specimens Part 9: Determination of the reference density Part 10: Compactibility Part 11: Determination of the affinity between aggregate and bitumen Part 12: Determination of the wa
21、ter sensitivity of bituminous specimens Part 13: Temperature measurement Part 14: Water content Part 15: Determination of the segregation sensitivity Part 16: Abrasion by studded tyres Part 17: Particle loss of porous asphalt specimen Part 18: Binder drainage Part 19: Permeability of specimen Part 2
22、0: Indentation using cube or cylindrical specimens (CY) Part 21: Indentation using plate specimens Part 22: Wheel tracking Part 23: Determination of the indirect tensile strength of bituminous specimens Part 24: Resistance to fatigue Part 25: Cyclic compression test Part 26: Stiffness Part 27: Sampl
23、ing Part 28: Preparation of samples for determining binder content, water content and grading Part 29: Determination of the dimensions of a bituminous specimen BS EN 12697-3:2013EN 12697-3:2013 (E) 5 Part 30: Specimen preparation by impact compactor Part 31: Specimen preparation by gyratory compacto
24、r Part 32: Laboratory compaction of bituminous mixtures by vibratory compactor Part 33: Specimen prepared by roller compactor Part 34: Marshall test Part 35: Laboratory mixing Part 36: Determination of the thickness of a bituminous pavement Part 37: Hot sand test for the adhesivity of binder on prec
25、oated chippings for HRA Part 38: Common equipment and calibration Part 39: Binder content by ignition Part 40: In situ drainability Part 41: Resistance to de-icing fluids Part 42: Amount of foreign matter in reclaimed asphalt Part 43: Resistance to fuel Part 44: Crack propagation by semi-circular be
26、nding test Part 45: Saturation Ageing Tensile Stiffness (SATS) conditioning test Part 46: Low temperature cracking and properties by uniaxial tension tests Part 47: Determination of the ash content of natural asphalts Part 48:Interlayer bonding (Torque bond test TBT, Shear bond test SBT, Tensile Adh
27、esion Test - TAT)1) Part 49: Determination of friction after polishing1) Part 50: Resistance to scuffing1)WARNING The method described in this European Standard may require the use of dichloromethane (methylene chloride), 1.1.1-trichlorethane, benzene, trichlorethylene, xylene, toluene, tetrachloroe
28、thylene or other solvent capable of dissolving bitumen. These solvents are hazardous to health and are subject to occupational exposure limits as detailed in relevant legislation and regulations. Exposure levels are related to both handling procedures and ventilation provision and it is important th
29、at adequate training be given to staff employed in the usage of these substances. 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 1)In
30、preparation. BS EN 12697-3:2013EN 12697-3:2013 (E) 6 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, Slovakia, Slovenia, Spain,
31、 Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12697-3:2013EN 12697-3:2013 (E) 7 1 Scope This document describes a test method for the recovery of soluble bitumen from bituminous mixtures used in road, airfield or similar pavements in a form suitable for further testing. The test can be
32、undertaken on either loose or compacted asphalt materials. The procedure is suitable for the recovery of paving grade bitumens, for which materials this European Standard is the reference method. The fractionating column procedure (see EN 12697-4) is the reference method for mixtures containing vola
33、tile matter such as cut-back bitumen. For recovery of polymer modified bitumens, the rotary evaporator procedure is recommended. 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 refer
34、ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12594, Bitumen and bituminous binders Preparation of test samples EN 12697-1:2012, Bituminous mixtures Test methods for hot mix asphalt Part 1: Soluble
35、binder content EN 12697-38, Bituminous mixtures Test methods for hot mix asphalt Part 38: Common equipment and calibration 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 12697-1:2012 and the following apply. 3.1 soluble binder content proportion of e
36、xtractable binder in an anhydrous sample determined by extracting the binder from the sample Note 1 to entry: Extraction can be followed by binder recovery. Note 2 to entry: The soluble binder content is expressed in percent by mass. 3.2 insoluble binder content proportion of binder that adheres to
37、the aggregate after extraction Note 1 to entry: The insoluble binder content is expressed in percent by mass. 4 Principle The bitumen is separated from the sample by dissolving in dichloromethane (or other suitable solvent). After removal of undissolved solids from the bitumen solution, the bitumen
38、is recovered from it by vacuum distillation using a rotary evaporator. The bitumen is in solution for less than 24 h. 5 Apparatus 5.1 Apparatus for the extraction of the soluble bitumen A suitable container with stopper in which the sample and solvent can be agitated together, an asphalt analyser or
39、 other apparatus for the extraction of soluble bitumen defined in EN 12697-1. BS EN 12697-3:2013EN 12697-3:2013 (E) 8 NOTE The use of the hot extraction methods in EN 12697-1 may harden the binder and hence affect the results from subsequent tests. However, this hardening is usually approximately eq
40、uivalent to the softening resulting from any solvent residue. 5.2 Apparatus for the clarification of the bitumen solution For clarification of the bitumen solution, a sample-tube centrifuge, a continuous centrifuge or a filtration system may be used. Centrifuges are suitable for separation of solids
41、 from any bitumen solutions and are the recommended apparatus for use with this method. The filtration apparatus may not be suitable for the separation of solids from all types of bituminous solutions but it has been included in this method because of the general availability of this equipment in as
42、phalt testing laboratories. If difficulties are experienced using a pressure filter the centrifuge technique should be used. NOTE If an asphalt analyser is used for the extraction of soluble bitumen, the use of a centrifuge is not required. 5.2.1 Sample tube centrifuge, capable of developing an acce
43、leration of at least 15 000 m/s2in accordance with the formula: a = 1,097 n2 r 105(1) where a is the acceleration, expressed in metres per second squared (m/s2); n is the number of revolutions, expressed as revolution per minute (r/min); r is the radius to the bottom of the tubes (internal) when rot
44、ating, expressed in millimetres (mm). The centrifuge tubes shall be fitted with effective closures. The speed of rotation shall be verified regularly in accordance with EN 12697-38 to ensure that the centrifuge maintains its performance at all times. The centrifuge shall be maintained in accordance
45、with this document. NOTE A typical centrifuge of this type, suitable for this method, carries four or six tubes of 200 ml or 500 ml capacity rotating at 3 000 r/min at a radius (as defined above) of 250 mm. 5.2.2 Continuous laboratory centrifuge, that takes a continuous feed of material, giving a co
46、ntinuous discharge of solution and capable of achieving an acceleration of 25 000 m/s2. 5.2.3 A pressure filter, of appropriate size. NOTE A pressure filter taking a paper of 270 mm diameter is suitable. 5.2.4 An air pump, for supplying oil-free air at about 200 kPa. 5.2.5 A supply of filter papers
47、with a minimum retention size of 11 m, to fit the pressure filter. 5.3 Distillation apparatus NOTE The distillation apparatus, a typical rotary evaporator, is shown in Figure 1. 5.3.1 Rotary evaporator, incorporating a rotating evaporating flask which can be operated under vacuum. Some models have a
48、n inclined condenser as shown in Figure 1, but other models using vertical condensers may be used.The apparatus shall: a) accept a 1 l capacity evaporating flask; BS EN 12697-3:2013EN 12697-3:2013 (E) 9 b) have a drive motor and speed control capable of rotating the evaporating flask at (75 15) r/mi
49、n; c) be capable of operating at P2kPa pressure where P2is taken from Table 1 for the solvent to be used; d) have an evaporation capacity of solvent at a bath temperature of (T1+ 5) C of at least 0,85 l/h when the flask is rotated at 75 r/min where T1is taken from Table 1 for the solvent to be used. 5.3.2 A 1 l, pressure resistant, evaporating flask, of heat-resistant glass fitted with a ground-glass joint. 5.3
