1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12697-21:2012Bituminous mixtures Testmethods for hot mix asphaltPart 21: Indentation using plate specimensBS EN 12697-21:2012 BRITISH STANDARDNational forewordThis British
2、Standard is the UK implementation of EN 12697-21:2012.It supersedes BS EN 12697-21:2003 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/510/1, Asphalt products.A list of organizations represented on this committee can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 secr
3、etary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 75766 2ICS 93.080.20Compliance with a British Standard cannot c
4、onfer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2012.Amendments issued since publicationDate Text affectedBS EN 12697-21:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12697-21 April 2012 I
5、CS 93.080.20 Supersedes EN 12697-21:2003English Version Bituminous mixtures - Test methods for hot mix asphalt - Part 21: Indentation using plate specimens Mlanges bitumineux - Mthodes dessai pour mlange hydrocarbon chaud - Partie 21: Essai dindentation de plaques Asphalt - Prfverfahren fr Heiasphal
6、t - Teil 21: Eindringversuch an Platten This European Standard was approved by CEN on 26 February 2012. 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 any alteration.
7、 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 language made by tr
8、anslation 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, Estonia, Fin
9、land, 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 FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EURO
10、PISCHES 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. Ref. No. EN 12697-21:2012: EBS EN 12697-21:2012EN 12697-21:2012 (E) 2 Contents Page Foreword 31 Scope 72 Norma
11、tive references 73 Apparatus .73.1 Moulding of test plates of mastic asphalt .73.2 Apparatus for the indentation test .74 Sampling and preparation of laboratory sample 84.1 Sampling .84.2 Preparation of the samples .85 Procedure .96 Calculation and expression of results .97 Precision 108 Test report
12、 . 10Bibliography . 11BS EN 12697-21:2012EN 12697-21:2012 (E) 3 Foreword This document (EN 12697-21:2012) 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
13、publication of an identical text or by endorsement, at the latest by October 2012, and conflicting national standards shall be withdrawn at the latest by October 2012. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CEN
14、ELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 12697-21:2003. The following is a list of significant technical changes since the last edition: test cubes renamed as test plates and height of cylindrical specimens defined; the system to a
15、pply the load clarified, including that the equipment is suitable; pneumatic thrusters redefined as pneumatic actuator; clarification that the water bath only has to be capable of maintaining the temperature in the vicinity of the sample; in the preparation of samples, the temperature of mastic asph
16、alt with modified binders and/or for low temperature mastic asphalt shall be in accordance with the producers instructions; requirement added about the storage of specimens prior to the start of testing from the time of their manufacture. This European Standard is one of a series of standards as lis
17、ted below: EN 12697-1, Bituminous mixtures Test methods for hot mix asphalt Part 1: Soluble binder content EN 12697-2, Bituminous mixtures Test methods for hot mix asphalt Part 2: Determination of particle size distribution EN 12697-3, Bituminous mixtures Test methods for hot mix asphalt Part 3: Bit
18、umen recovery: Rotary evaporator EN 12697-4, Bituminous mixtures Test methods for hot mix asphalt 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
19、for hot mix asphalt Part 6: Determination of bulk density of bituminous specimens EN 12697-7, Bituminous mixtures Test methods for hot mix asphalt Part 7: Determination of bulk density of bituminous specimens by gamma rays BS EN 12697-21:2012EN 12697-21:2012 (E) 4 EN 12697-8, Bituminous mixtures Tes
20、t methods for hot mix asphalt Part 8: Determination of void characteristics of bituminous specimens EN 12697-10, Bituminous mixtures Test methods for hot mix asphalt Part 10: Compactibility EN 12697-11, Bituminous mixtures Test methods for hot mix asphalt Part 11: Determination of the affinity betwe
21、en aggregate and bitumen EN 12697-12, Bituminous mixtures Test methods for hot mix asphalt Part 12: Determination of the water sensitivity of bituminous specimens EN 12697-13, Bituminous mixtures Test methods for hot mix asphalt Part 13: Temperature measurement EN 12697-14, Bituminous mixtures Test
22、methods for hot mix asphalt Part 14: Water content EN 12697-15, Bituminous mixtures Test methods for hot mix asphalt Part 15: Determination of the segregation sensitivity EN 12697-16, Bituminous mixtures Test methods for hot mix asphalt Part 16: Abrasion by studded tyres EN 12697-17, Bituminous mixt
23、ures Test methods for hot mix asphalt Part 17: Particle loss of porous asphalt specimen EN 12697-18, Bituminous mixtures Test methods for hot mix asphalt Part 18: Binder drainage EN 12697-19, Bituminous mixtures Test methods for hot mix asphalt Part 19: Permeability of specimen EN 12697-20, Bitumino
24、us mixtures Test methods for hot mix asphalt Part 20: Indentation using cube or cylindrical specimens EN 12697-21, Bituminous mixtures Test methods for hot mix asphalt Part 21: Indentation using plate specimens EN 12697-22, Bituminous mixtures Test methods for hot mix asphalt Part 22: Wheel tracking
25、 EN 12697-23, Bituminous mixtures Test methods for hot mix asphalt Part 23: Determination of the indirect tensile strength of bituminous specimens EN 12697-24, Bituminous mixtures Test methods for hot mix asphalt Part 24: Resistance to fatigue EN 12697-25, Bituminous mixtures Test methods for hot mi
26、x asphalt Part 25: Cyclic compression test EN 12697-26, Bituminous mixtures Test methods for hot mix asphalt Part 26: Stiffness EN 12697-27, Bituminous mixtures Test methods for hot mix asphalt Part 27: Sampling EN 12697-28, Bituminous mixtures Test methods for hot mix asphalt Part 28: Preparation o
27、f samples for determining binder content, water content and grading EN 12697-29, Bituminous mixtures Test methods 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 i
28、mpact compactor EN 12697-31, Bituminous mixtures Test methods for hot mix asphalt Part 31: Specimen preparation by gyratory compactor BS EN 12697-21:2012EN 12697-21:2012 (E) 5 EN 12697-32, Bituminous mixtures Test methods for hot mix asphalt Part 32: Laboratory compaction of bituminous mixtures by v
29、ibratory compactor EN 12697-33, Bituminous mixtures Test methods for hot mix asphalt Part 33: Specimen prepared by roller compactor EN 12697-34, Bituminous mixtures Test methods for hot mix asphalt Part 34: Marshall test EN 12697-35, Bituminous mixtures Test methods for hot mix asphalt Part 35: Labo
30、ratory mixing EN 12697-36, Bituminous mixtures Test methods for hot mix asphalt Part 36: Determination of the thickness of a bituminous pavement EN 12697-37, Bituminous mixtures Test methods for hot mix asphalt Part 37: Hot sand test for the adhesivity of binder on pre-coated chippings for HRA EN 12
31、697-38, Bituminous mixtures Test methods for hot mix asphalt Part 38: Common equipment and calibration EN 12697-39, Bituminous mixtures Test methods for hot mix asphalt Part 39: Binder content by ignition EN 12697-40, Bituminous mixtures Test methods for hot mix asphalt Part 40: In situ drainability
32、 EN 12697-41, Bituminous mixtures Test methods for hot mix asphalt Part 41: Resistance to de-icing fluids EN 12697-42, Bituminous mixtures Test methods for hot mix asphalt Part 42: Amount of foreign matters in reclaimed asphalt EN 12697-43, Bituminous mixtures Test methods for hot mix asphalt Part 4
33、3: Resistance to fuel EN 12697-44, Bituminous mixtures Test methods for hot mix asphalt Part 44: Crack propagation by semi-circular bending test EN 12697-45, Bituminous mixtures Test methods for hot mix asphalt Part 45: Saturation ageing tensile stiffness (SATS) conditioning test EN 12697-46, Bitumi
34、nous mixtures Test methods for hot mix asphalt Part 46: Low temperature cracking and properties by uniaxial tension tests EN 12697-47, Bituminous mixtures Test methods for hot mix asphalt Part 47: Determination of the ash content of natural asphalt prEN 12697-48, Bituminous mixtures Test methods for
35、 hot mix asphalt Part 48: Interlayer bond strength1)prEN 12697-49, Bituminous mixtures Test methods for hot mix asphalt Part 49: Determination of friction after polishing1)prEN 12697-50, Bituminous mixtures Test methods for hot mix asphalt Part 50: Scuffing resistance of surface course asphalt1) Acc
36、ording to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, I
37、taly, Latvia, 1) In preparation BS EN 12697-21:2012EN 12697-21:2012 (E) 6 Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12697-21:2012EN 12697-21:2012 (E) 7 1 Scope This European Stand
38、ard specifies a test method for measuring the indentation of mastic asphalt when it is penetrated at a given temperature, load and for a fixed time period by a standardised cylindrical indentor pin with a circular flat-ended base. This European Standard applies to mastic asphalt with aggregates of m
39、aximum nominal size less or equal to 16 mm. 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
40、the referenced document (including any amendments) applies. EN 12697-27, Bituminous mixtures Test methods for hot mix asphalt Part 27: Sampling 3 Apparatus 3.1 Moulding of test plates of mastic asphalt 3.1.1 Moulds of 100 mm to 150 mm diameter and 25 mm height or sample moulds 150 mm 150 mm 25 mm. A
41、pproximate dimensions are sufficiently accurate. 3.1.2 Oven capable of maintaining temperature of (250 10) C. 3.1.3 Spatula 3.1.4 Thermometer capable to measure 300 C accurate to 2 C. 3.2 Apparatus for the indentation test 3.2.1 System for the load transmission 3.2.1.1 General A system able to apply
42、 the load under the conditions of Table 1 for the selected type of test. The load is applied differently according to the type of apparatus used. The following load application systems are suitable: 3.2.1.2 Lever arm and counterweight: After balancing of lever arm, with help of a balance weight, pla
43、ce a weight into a mark situated on the arm, at such a distance, that the chosen load is applied on the pin. 3.2.1.3 Direct charge system: Comprising a plate, fixed to a vertical axis. 3.2.1.4 Transmission by pneumatic actuator: Pressure of compressed air permits the desired force to be obtained. Th
44、is pressure is preliminarily adjusted by means of a pressure gauge and released at the moment of the test. BS EN 12697-21:2012EN 12697-21:2012 (E) 8 3.2.1.5 Flat ended, cylindrical stainless steel, indentor pins of the following diameters: (25,2 0,1) mm for a surface of 500 mm2; (11,3 0,1) mm for a
45、surface of 100 mm2; (6,35 0,1) mm for a surface of 31,7 mm2. 3.2.2 Apparatus for measuring indentation 3.2.2.1 General The depth of penetration of the pin into the specimen is measured as follows: 3.2.2.2 Displacement transducer with an accuracy of 0,05 mm, comprising the measurement of test duratio
46、n. 3.2.2.3 System permitting registration of penetration in relation to the time passed with an accuracy of 0,05 mm, comprising the measurement of test duration. 3.2.3 Apparatus for temperature regulation 3.2.3.1 A thermostatic water bath capable of maintaining the temperature in the vicinity of the
47、 sample with an accuracy of 1 C. 3.2.3.2 A thermometer with an accuracy of 0,1 C. 4 Sampling and preparation of laboratory sample 4.1 Sampling The sampling shall take place at fixed plants or at mobile equipment and shall be taken from laid or finished material according to EN 12697-27. The required
48、 mass to form laboratory samples is at least three increments of 1 kg. 4.2 Preparation of the samples If the sample is to be tested in a laboratory, the material has to be cleaned and freed from packaging material and from loose particles. Then reheat the mixture up to the pouring temperature and homogenise the molten material by stirring thoroughly. If the sample is to be tested immediately, a homogeneous sample at the pouring temperature shall be taken. The temperature shall never excess the maximum temperature according to the local regulations. The toughly liquid bitum
