1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12697-42:2012Bituminous mixtures Testmethods for hot mix asphaltPart 42: Amount of foreign matter inreclaimed asphaltBS EN 12697-42:2012 BRITISH STANDARDNational forewordTh
2、is British Standard is the UK implementation of EN 12697-42:2012.It supersedes BS EN 12697-42:2005 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/510/1, Asphalt products.A list of organizations represented on this committee can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
3、to its secretary.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 78259 6ICS 93.080.20Compliance with a British Standa
4、rd cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 28 February 2013.Amendments issued since publicationDate Text affectedBS EN 12697-42:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12697
5、-42 November 2012 ICS 93.080.20 Supersedes EN 12697-42:2005English Version Bituminous mixtures - Test methods for hot mix asphalt - Part 42: Amount of foreign matter in reclaimed asphalt Mlanges bitumineux - Mthodes dessai pour mlange hydrocarbon chaud - Partie 42: Quantit de matriaux trangers prsen
6、ts dans les agrgats denrobs Asphalt - Prfverfahren fr Heiasphalt - Teil 42: Fremdstoffgehalt in Ausbauasphalt This European Standard was approved by CEN on 13 October 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europe
7、an 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
8、(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, Belg
9、ium, 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, Slovakia, Slovenia, Spain, Sweden, Switze
10、rland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Re
11、f. No. EN 12697-42:2012: EBS EN 12697-42:2012EN 12697-42:2012 (E) 2 Content Page Foreword 31 Scope 62 Normative references 63 Terms and definitions .64 Principle 75 Apparatus .76 Preparation of the sample .77 Procedure .78 Expression of results 89 Test report 810 Precision data 9Annex A (informative
12、) Amount of foreign matter in finer fractions 10A.1 General . 10A.2 Additional definitions . 10A.3 Apparatus 10A.4 Preparation of the sample 10A.5 Procedure 11A.6 Expression of results . 11A.7 Test report . 11BS EN 12697-42:2012EN 12697-42:2012 (E) 3 Foreword This document (EN 12697-42:2012) has bee
13、n 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 May 2013, and conflicting national standards
14、 shall be withdrawn at the latest by May 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 patent rights. This document supersedes EN 12697-42:20
15、05. Compared with EN 12697-42:2005, the following significant changes have been made: definition of coarse foreign matter includes 8 mm minimum size; solvent for hydrocarbons made less specific; classifications for material brought directly into line with those in EN 13108-8; source of reclaimed asp
16、halt to be reported clarified; annex for analysis of finer material added. WARNING The methods described in this European Standard require the use of solvents that are hazardous to health and are subject to occupational exposure limits as described in relevant legislation and regulations. Exposure l
17、evels are related to both handling procedures and ventilation provision and it is emphasised that adequate training should be given to staff employed in the usage of these substances. EN 12697, Bituminous mixtures Test methods for hot mix asphalt contains the following parts: Part 1: Soluble binder
18、content 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: Determination of bulk density of b
19、ituminous specimens by gamma rays Part 8: Determination of void characteristics of bituminous specimens Part 9: Determination of the reference density Part 10: Compactability BS EN 12697-42:2012EN 12697-42:2012 (E) 4 Part 11: Determination of the affinity between aggregate and bitumen Part 12: Deter
20、mination of the water 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
21、of specimen Part 20: 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: Stiffn
22、ess Part 27: Sampling Part 28: Preparation of samples for determining binder content, water content and grading Part 29: Determination of the dimensions of a bituminous specimen Part 30: Specimen preparation by impact compactor Part 31: Specimen preparation by gyratory compactor Part 32: Laboratory
23、compaction of bituminous mixtures by a 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 precoated chippings for
24、HRA Part 38: Common equipment and calibration BS EN 12697-42:2012EN 12697-42:2012 (E) 5 Part 39: Binder content by ignition Part 40: In situ drainability Part 41: Resistance to de-icing fluids Part 42: Amount of coarse foreign matter in reclaimed asphalt (the present document) Part 43: Resistance to
25、 fuel. Part 44: Crack propagation by semi-circular bending 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 T
26、orque bond test (TBT), Shear bond test (SBT), Tensile Adhesion Test (TAT)1) Part 49: Determination of friction after polishing1) Part 50: Resistance to scuffing 1)According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement
27、 this European Standard: 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, Slo
28、vakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. 1) In preparation. BS EN 12697-42:2012EN 12697-42:2012 (E) 6 1 Scope This European Standard specifies a visual method of determining the amount and components of coarse foreign matter in reclaimed asphalt. A method for deter
29、mining the amount and components of finer foreign matter in reclaimed asphalt is given in Annex A. This method does not completely categorise the foreign matter that can occur in asphalt. NOTE 1 For the use of reclaimed asphalt in asphalt mixtures, it is important to know the components in the recla
30、imed asphalt and to what extent coarse foreign matter is present that can influence the properties of the asphalt mix. NOTE 2 The method is not intended to categorise all foreign materials but rather to ensure that the amount of coarse foreign materials are minimised. 2 Normative references The foll
31、owing 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 932-1:1996,
32、Test for general properties of aggregates Part 1: Methods for sampling EN 933-2, Test for geometrical properties of aggregates Part 2: Determination of particle size distribution Test sieves, nominal size of apertures EN 12697-27, Bituminous mixtures Test methods for hot mix asphalt Part 27: Samplin
33、g 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 932-1:1996 and the following apply. 3.1 reclaimed asphalt asphalt made reusable by milling of asphalt road layers, by crushing of lumps torn up from asphalt pavements and asphalt from surplus productio
34、n 3.2 coarse foreign matter matter that is greater in size than 8 mm in reclaimed asphalt not derived from asphalt pavements or surplus production, and cold asphalt produced with cut-back bitumen 3.3 primary source quarry or pit from which aggregate has traditionally been used successfully in the ma
35、nufacture of one or more types of asphalt 3.4 secondary source quarry, pit or other source from which aggregate has not traditionally been used successfully in the manufacture of any type of asphalt BS EN 12697-42:2012EN 12697-42:2012 (E) 7 4 Principle The test methodology for determining the amount
36、 and components of coarse foreign matter in reclaimed asphalt consists of the visual inspection and determination of the composition of two sub-samples, taken from a representative sample of reclaimed asphalt. NOTE An optional method for determining the amount and components of finer foreign matter
37、in reclaimed asphalt is given in Annex A. 5 Apparatus 5.1 Sieve, with a nominal aperture size of 8 mm, conforming to EN 933-2. 5.2 Balance to weight to 1 g. 5.3 Sampling divider, conforming to either EN 932-1 or EN 12697-27. 5.4 Hydrochloric acid, 1 mol/l. 5.5 Solvent for hydrocarbons. 5.6 Water. 6
38、Preparation of the sample 6.1 The reclaimed asphalt on the feedstock shall be visually inspected for the presence of coarse foreign materials. When coarse foreign matter is present, take a representative sample of reclaimed asphalt from the feedstock. The sample shall be at least 20 kg. 6.2 Sieve th
39、e sample using the sieve described in 5.1. Take the portion of the sample remaining in the sieve and divide it into two sub-samples by means of the sampling divider. NOTE The composition of the fraction of the sample remaining in the sieve is taken to be representative of the composition of the tota
40、l amount of reclaimed asphalt from which the sample was taken. 7 Procedure 7.1 The two sub-samples shall be visually inspected for the presence of coarse foreign matter and the composition of each sub-sample shall be established as specified in 7.2. Each sub-sample shall be visually inspected and it
41、s composition determined and the two analyses shall be independent of each other. NOTE 1 Cold asphalt produced with cut-back bitumen may be hard to distinguish from “asphalt“. However, in that case, the cold asphalt may be considered as “asphalt”: any cut-back in the reclaimed asphalt will affect bi
42、nder. Distinction is favourable as the presence of flux may influence the final binder properties to an unwanted level or may lead to safety risks during the production of recycling asphalt. NOTE 2 Because of the strong influence of the analyst on the test result executing the test twice by two inde
43、pendent analyses is required. 7.2 Each sub-sample shall be sorted into: a) natural aggregate and material derived from asphalt; b) group 1 materials such as: BS EN 12697-42:2012EN 12697-42:2012 (E) 8 1) cement concrete, including cement concrete products; 2) bricks; 3) sub base materials (excluding
44、natural aggregate); 4) cement mortar; 5) metal. c) group 2 materials such as: 1) synthetic materials; 2) wood; 3) plastics. NOTE 1 If necessary, washing the material with water before inspection may be helpful in order to facilitate the inspection. NOTE 2 In case of doubt, the presence of concrete c
45、an be proved by use of hydrochloric acid, and asphalt by use of dichloromethane. 7.3 The mass of asphalt, cold asphalt produced with cut-back bitumen and coarse foreign matter not derived from asphalt (divided into side materials and other materials), shall each be determined to an accuracy of 1 g.
46、7.4 Calculate the content of asphalt, cold asphalt produced with cut-back bitumen and coarse foreign matter not derived from asphalt (divided into side materials and other materials) in the sub-sample, as a percentage by mass, to an accuracy of 0,1 % by mass. 7.5 If the mass of coarse foreign matter
47、 obtained from the sub-samples by each independent analysis differs from that obtained by the other independent analysis by more than 5 % by mass, the cause of this difference shall be investigated. If no explanation for a difference in mass is found, a new representative sample is taken and the tes
48、t is performed once more. 8 Expression of results Calculate the content of material derived from asphalt, coarse foreign matter derived from asphalt and coarse foreign matter not derived from asphalt, expressed as the average of the results of both analyses, to an accuracy of 0,1 % by mass. 9 Test r
49、eport The test report shall include the following information: a) identification of the feedstock; b) source of reclaimed asphalt (mixture and locations from which the feedstock has been derived, if known); c) tonnage of the feedstock; BS EN 12697-42:2012EN 12697-42:2012 (E) 9 d) content of material derived from asphalt, coarse foreign matter derived from asphalt and coarse foreign matter not derived fro
