CEN TS 12697-50-2016 Bituminous mixtures - Test methods - Part 50 Resistance to scuffing.pdf

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1、PD CEN/TS 12697-50:2016Bituminous mixtures TestmethodsPart 50: Resistance to scuffingBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06PD CEN/TS 12697-50:2016 PUBLISHED DOCUMENTNational forewordThis Published Document is the UK implementation of CEN/TS12697-50:2016.The

2、 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 secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are respon

3、sible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 91182 8ICS 93.080.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This Published Document was published under the authority of theStandards

4、 Policy and Strategy Committee on 31 July 2016.Amendments issued since publicationDate Text affectedPD CEN/TS 12697-50:2016TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATION CEN/TS 12697-50 April 2016 ICS 93.080.20 English Version Bituminous mixtures - Test methods - Part 50: Re

5、sistance to scuffing Mlanges bitumineux - Mthodes dessai - Partie 50: Rsistance aux arrachements superficiels Asphalt - Prfverfahren - Teil 50: Widerstand gegen Oberflchenverschlei This Technical Specification (CEN/TS) was approved by CEN on 11 February 2016 for provisional application. The period o

6、f validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard. CEN members are required to announce the existence of this CEN/TS i

7、n the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached. CE

8、N members are the national standards bodies of 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,

9、Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey andUnited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in an

10、y form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 12697-50:2016 EPD CEN/TS 12697-50:2016CEN/TS 12697-50:2016 (E) 2 Contents Page European foreword . 5 1 Scope 6 2 Normative references 6 3 Principle . 6 4 Terms, definitions, symbols and abbreviations . 7 4.1 Terms a

11、nd definitions . 7 4.2 Symbols and abbreviations . 7 5 Preparation of test specimens 7 5.1 General 7 5.2 Compaction of the slabs 7 5.3 Dimensions of the specimens . 8 5.4 Age of the specimens 8 5.5 Dimensions and bulk density of the specimens . 8 6 Loading devices 8 7 Test results 9 8 Test report 10

12、 8.1 General . 10 8.2 Precision 11 8.2.1 Repeatability 11 8.2.2 Reproducibility . 11 Annex A (normative) The ARTe . 12 A.1 Equipment 12 A.1.1 General . 12 A.1.2 Lateral moving table . 12 A.1.3 Set of rotating wheels . 12 A.1.4 Slab fixation box . 13 A.1.5 Temperature controlled room 13 A.1.6 Tempera

13、ture measuring devices . 13 A.1.7 Electric fan (optional) . 13 A.2 Test procedure 14 Annex B (normative) The Darmstadt device . 18 B.1 Equipment 18 B.1.1 General . 18 B.1.2 Lateral moving table . 18 B.1.3 Test tyre . 18 PD CEN/TS 12697-50:2016CEN/TS 12697-50:2016 (E) 3 B.1.4 Asphalt specimen fixture

14、 . 18 B.1.5 Heating/temperature 18 B.1.6 Vacuum wipe-off apparatus 19 B.1.7 Temperature measurements . 19 B.1.8 Oven . 19 B.2 Test procedure 19 Annex C (informative) The Rotating Surface Abrasion Test (RSAT) . 22 C.1 General . 22 C.2 Equipment . 22 C.2.1 Motion mechanism . 22 C.2.2 Test tyre . 23 C.

15、2.3 Wheel load and contact pressure 23 C.2.4 Wheel arm guide . 24 C.2.5 Attachment of the wheel to the wheel arm 24 C.2.6 Rotation hinge (wheel arm guide) 24 C.2.7 Slab holder test specimen RSAT 24 C.2.8 Bearing and rotary axle, consisting of a ring bearer . 25 C.2.9 Braking mechanism . 25 C.2.10 As

16、phalt specimen fixture . 25 C.2.11 Vacuum wipe-off apparatus 26 C.3 Test temperature 26 C.3.1 Heating/temperature 26 C.3.2 Temperature measurements . 26 Annex D (informative) The TRD (TriboRoute Device) . 29 D.1 Equipment . 29 D.1.1 General . 29 D.1.2 Load applicator 29 D.1.3 Lateral moving table 30

17、 D.1.4 Asphalt specimen fixture . 30 D.1.5 Heating/temperature 30 D.1.6 Vacuum wipe-off apparatus 31 D.2 Test procedure 31 D.2.1 Specimen preparation 31 D.2.2 Control of the specimen surface characteristics . 31 D.2.3 Test performance . 32 D.2.3.1 General . 32 PD CEN/TS 12697-50:2016CEN/TS 12697-50:

18、2016 (E) 4 D.2.3.2 Test performed with controlled force (TRD-CF). 32 D.2.3.3 Test performed with controlled displacement rate (TRD-CD) 33 Bibliography . 34 PD CEN/TS 12697-50:2016CEN/TS 12697-50:2016 (E) 5 European foreword This document (CEN/TS 12697-50:2016) has been prepared by Technical Committe

19、e CEN/TC 227 “Road materials”, 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 and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to t

20、he CEN-CENELEC Internal Regulations, the national standards organizations 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, Gre

21、ece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. PD CEN/TS 12697-50:2016CEN/TS 12697-50:2016 (E) 6 1 Scope This European Technical Specification

22、specifies a test method for determining the resistance to scuffing of asphalt mixtures which are used in surface layers and are loaded with high shear stresses in road or airfield pavement. These shear stresses occur in the contact area between tyre and pavement surface and can be caused by cornerin

23、g of the vehicle. Due to these shear stresses, material loss will occur at the surface of these layers. The test is normally performed on asphalt layers with a high amount of air voids (e.g. porous asphalt), but can also be applied on other asphaltic mixtures. Test specimens are used either produced

24、 in a laboratory or cut from the pavement. NOTE The test is developed to determine the resistance to scuffing for noise reducing surface layers where raveling is the normative damage criterion. The test can also be performed on other surface mixtures with a high resistance to permanent deformation.

25、In case a mixture has a low resistance to permanent deformation, rutting can occur during the test. This can influence the test results. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dat

26、ed references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12697-6, Bituminous mixtures Test methods for hot mix asphalt Part 6: Determination of bulk density of bituminous specimens EN 12697-29, Bitumin

27、ous mixtures Test method for hot mix asphalt Part 29: Determination of the dimensions of a bituminous specimen EN 12697-33, Bituminous mixtures Test methods for hot mix asphalt Part 33: Specimen prepared by roller compactor 3 Principle Laboratory compacted asphalt specimens or asphalt specimens cut

28、from a pavement is fixed in a test facility. In this facility, the asphalt material is loaded simultaneously with both normal and shear stresses. Due to these stresses, material loss will occur from the surface of the slab. This material loss depends on the resistance to scuffing of the tested aspha

29、lt mixture: the higher the resistance, the less material will disappear. To determine the resistance to scuffing, two slabs or (set of) cores shall be tested. The average of both test results is reported as the resistance to scuffing. In this Technical Specification four different kinds of loading f

30、acilities are described: The ARTe (the Aachener Raveling Tester); The DSD (the Darmstadt Scuffing Device); The RSAT (the Rotating Surface Abrasion Test) and The Triboroute. PD CEN/TS 12697-50:2016CEN/TS 12697-50:2016 (E) 7 4 Terms, definitions, symbols and abbreviations For the purposes of this docu

31、ment, the following term and definition, symbols and abbreviations apply. 4.1 Terms and definitions 4.1.1 material loss amount of material that has been lost from the surface of the slab due to the test Note 1 to entry: The amount of material loss can be determined in 3 different ways: Visually and/

32、or by taking pictures; by weighing the mass of the slab before and after the test. The difference in mass per area is a measure for the resistance to scuffing of the tested asphalt mixture; by scanning the surface of the slab before and after the test. The scans provide a 3D picture from the surface

33、 of the slab. After subtracting mathematically the 3D picture after the test from the one before the test, an accurate 3D overview of the material loss can be generated. The calculated volume of this 3D overview of the material loss is a accurate value for the resistance to scuffing of the tested as

34、phalt mixture. Note 2 to entry: If permanent deformation occurs during the test, the results of the surface scan have to be compensated for this phenomenon. 4.2 Symbols and abbreviations T is the thickness of the slab, in 0,1 mm; W is the width of the slab, in 0,1 mm; L is the length of the slab, in

35、 0,1 mm; A is the surface of the tested slab, in 0,01 mm2; M0is the mass of the slab before performing the test, in 1 grams; M1is the mass of the slab after performing the test, in 1 grams; M is the loss of mass due to performing the test, in 1 grams; V0is the volume of the texture of the slab befor

36、e performing the test, in 0,1 mm3; V1is the volume of the texture of the slab after performing the test, in 0,1 mm3; V is the loss of volume of the texture of the slab due to performing the test, in 0,1 mm3. 5 Preparation of test specimens 5.1 General To determine the resistance to scuffing of an as

37、phalt mixture, 2 slabs or 2 (sets of) cores of that material shall be tested. The average of both test results shall be considered to determine the resistance to scuffing. 5.2 Compaction of the slabs In the scuffing device, asphalt slabs or (sets of) cores shall be tested. These slabs or (sets of) c

38、ores shall be prepared according to EN 12697-33 or can be cut from pavements. PD CEN/TS 12697-50:2016CEN/TS 12697-50:2016 (E) 8 5.3 Dimensions of the specimens The test can be performed on specimens with various dimensions. However, standard dimensions of the slabs are (500 20) mm by (500 20) mm or

39、(500 20) mm by (320 20) mm. Cores shall have a standard diameter of (150 2) mm. The thickness of the specimen can vary between 30 mm and 80 mm. NOTE Also larger slabs or cores can be prepared which are fit to the correct dimensions by sawing. 5.4 Age of the specimens Prior to the start of testing, t

40、he specimen shall be stored on a flat surface at a temperature of not more than 20 C for between 14 days and 42 days from the time of their manufacture. In the case of samples requiring cutting, the cutting shall be performed no more than 8 days after compaction of the asphalt. The time of manufactu

41、re for these samples is the time when they are cut. NOTE Not only fresh asphalt mixtures can be tested, also aged specimens can be examined in the scuffing test. In literature several aging procedure can be found. The choice of a proper aging procedure depends on the characteristics of the tested ma

42、terial. 5.5 Dimensions and bulk density of the specimens The dimensions of the slab shall be determined according to EN 12697-29. The length, L, and width, W, of the slab are measured at four positions of the slab, equally divided over the area. The accuracy of the measurements shall be 0,1 mm. The

43、average of the four individual measurements are respective the length, L, and width, W, of the slab. The thickness, T, of the slab shall be determined at eight points. Each point shall be taken 100 mm from the edge of the slab using a vernier calliper. All eight point shall be equally divided over t

44、he surface of the slab. The accuracy of each measurement shall be 0,1 mm. The maximum difference between the eight individual measurements shall be 2,5 mm. If not, the specimen shall not be tested. The average of the eight measurements is the thickness, T, of the slab. If cores are tested, the diame

45、ter and thickness of each core shall be determined according to EN 12697-29 using a vernier calliper. The diameter, D, and the thickness, T, are measured at four positions of the slab, equally divided over the area. The accuracy of the measurements shall be 0,1 mm. The average of the four individual

46、 measurements shall be deemed to be the diameter of the core. The bulk density of the slab or the core shall be determined according to EN 12697-6 using the bulk density by dimensions procedure. Before measuring the mass, M0, of the slab, the specimen shall be dried to constant mass in air at a rela

47、tive air humidity of less than 80 % at a temperature not more than 20 C. A test specimen shall be considered to be dry after at least 8 h drying time and when two weighings performed minimum 4 h apart differ by less than 0,1 %. 6 Loading devices The resistance to scuffing can be determined using one

48、 of the following test devices: The ARTe (the Aachener Raveling Tester) see Annex A; The DSD (the Darmstadt Scuffing Device) see Annex B; The RSAT (the Rotating Surface Abrasion Test) see Annex C and The Triboroute see Annex D. PD CEN/TS 12697-50:2016CEN/TS 12697-50:2016 (E) 9 7 Test results The res

49、ults of the tests shall be reported using the results of the visual inspection and/or pictures before and after the test and the material loss per covered area (= MLpA). Alternatively, the increase in texture per covered area, V, can be used. The following formulae shall be used: Material loss per covered area MLpA when slabs are tested determine by 0,i 1,iiiii iiMMMMLpAWL WL= = with i = 1,2 (1) 221i=iMLpAMLpA (2) where M0,iis the mass of the slab i (i = 1,2) before performing the test, in 1 g (grams); M1,iis the mass