1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12697-26:2012Bituminous mixtures Testmethods for hot mix asphaltPart 26: StiffnessBS EN 12697-26:2012 BRITISH STANDARDNational forewordThis British Standard is the UK imple
2、mentation of EN 12697-26:2012.It supersedes BS EN 12697-26:2004 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/510/1, Asphalt products.A list of organizations represented on this committee can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 secretary.This publication d
3、oes 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 74079 4ICS 93.080.20Compliance with a British Standard cannot confer immunity fromlegal
4、 obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 March 2012.Amendments issued since publicationDate Text affectedBS EN 12697-26:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12697-26 March 2012 ICS 93.080.20 Supersede
5、s EN 12697-26:2004English Version Bituminous mixtures - Test methods for hot mix asphalt - Part 26: Stiffness Mlanges bitumineux - Mthodes dessai pour enrobs chaud - Partie 26: Rigidit Asphalt - Prfverfahren fr Heiasphalt - Teil 26: SteifigkeitThis European Standard was approved by CEN on 18 Septemb
6、er 2011. 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. Up-to-date lists and bibliographical references concerning such national standards may be obta
7、ined 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 translation under the responsibility of a CEN member into its own language and notified to the CE
8、N-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, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg,
9、 Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, 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 ri
10、ghts of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12697-26:2012: EBS EN 12697-26:2012EN 12697-26:2012 (E) 2 Contents PageForeword 41 Scope 72 Normative references 73 Terms, definitions and symbols .73.1 Terms and definitions .73.2 Symbols 94 P
11、rinciple . 105 Sample preparation 105.1 Age of the specimens . 105.2 Drying of the specimen 105.3 Dimensions and bulk density of the specimens . 105.4 Temperature of the specimen before testing . 105.5 Number of test specimens . 106 Checking of the testing equipment . 107 Test methods . 117.1 Genera
12、l . 117.2 Tests with sinusoidal or pulse loading. 117.3 Controlled strain rate loading 128 Temperatures 139 Expression of results . 1410 Test report . 1610.1 General . 1610.2 Information on specimen . 1610.3 Information on test method . 1710.4 Information on the test and results . 1710.5 Optional in
13、formation 1711 Precision 17Annex A (normative) Two point bending test on trapezoidal specimens (2PB-TR) or on prismatic specimens (2PB-PR) . 18A.1 Principle . 18A.2 Equipment . 18A.3 Specimen preparation 19A.4 Procedure 20Annex B (normative) Three point bending test on prismatic specimens (3PB-PR) a
14、nd four point bending test on prismatic specimens (4PB-PR) 21B.1 Principle . 21B.2 Equipment . 22B.3 Specimen preparation 23B.4 Procedure 23Annex C (normative) Test applying indirect tension to cylindrical specimens (IT-CY) 25C.1 Principle . 25C.2 Equipment . 25C.3 Specimen preparation 30BS EN 12697
15、-26:2012EN 12697-26:2012 (E) 3 PageC.4 Mode of operation .31Annex D (normative) Direct tension-compression test on cylindrical specimens (DTC-CY) . 33D.1 Principle 33D.2 Equipment 33D.3 Specimen preparation . 33D.4 Mode of operation . 34Annex E (normative) Test applying direct tension to cylindrical
16、 specimens (DT-CY) or to prismatic specimens (DT-PR) 36E.1 Principle 36E.2 Equipment 36E.3 Specimen preparation . 36E.4 Mode of operation . 37E.5 Derivation of the master-curve 38E.6 Determination of the stiffness modulus for the fixed loading time . 41Annex F (normative) Test applying Cyclic indire
17、ct tension to cylindrical specimens (CIT-CY) . 42F.1 Principle 42F.2 Equipment 42F.3 Specimen preparation . 44F.4 Mode of operation . 45Annex G (informative) Derivation of the master curve . 47G.1 Principle 47G.2 Theoretical background 48G.3 Experimental data 49G.4 Test report 50BS EN 12697-26:2012E
18、N 12697-26:2012 (E) 4 Foreword This document (EN 12697-26:2012) 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 publication of an identical text or by end
19、orsement, at the latest by September 2012, and conflicting national standards shall be withdrawn at the latest by September 2012. This document will supersede EN 12697-26:2004. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN a
20、nd/or CENELEC shall not be held responsible for identifying any or all such patent rights. The main changes deal with putting similar procedures in all the test in the general part of the standard. Also the correct wording is applied within all the test procedures. This document is one of a series o
21、f standards as listed 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 a
22、sphalt Part 3: Bitumen 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 mixt
23、ures Test methods 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 EN 12697-8, Bituminous mixtures Test methods for hot mix as
24、phalt Part 8: Determination of void characteristics of bituminous specimens EN 12697-10, Bituminous mixtures Test methods for hot mix asphalt Part 10: Compactability EN 12697-11, Bituminous mixtures Test methods for hot mix asphalt Part 11: Determination of the affinity between aggregate and bitumen
25、 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 methods for hot mix asph
26、alt Part 14: Water content BS EN 12697-26:2012EN 12697-26:2012 (E) 5 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 12697-1
27、7, Bituminous mixtures 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
28、12697-20, Bituminous mixtures Test methods for hot mix asphalt Part 20: Indentation using cube or Marshall 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:
29、 Wheel tracking 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 met
30、hods for hot mix 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
31、: Preparation of 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 p
32、reparation 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 a vibratory compactor EN 126
33、97-33, 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: Laboratory mixing EN 12697-36
34、, 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 precoated chippings for HRA BS EN 12697-26:2012EN 12697-26:
35、2012 (E) 6 EN 12697-38, 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 s
36、itu drainability 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 mi
37、x asphalt Part 43: Resistance to fuel EN 12697-44, Bituminous mixtures Test methods for hot mix asphalt Part 44; Crack propagation by semi-circular bending test prEN 12697-45, Bituminous mixtures Test methods for hot mix asphalt Part 45: Saturation ageing tensile stiffness (SATS) conditioning test p
38、rEN 12697-46, Bituminous 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 asphalts prEN 12697-48, Bituminous mixt
39、ures Test methods for hot mix asphalt Part 48: Inter-layer bond strength1)prEN 12697-49, Bituminous mixtures Test methods for hot mix asphalt Part 49: Skid resistance of asphalt in the laboratory1)prEN 12697-50, Bituminous mixtures Test methods for hot mix asphalt Part 50: Scuffing resistance of sur
40、face course1)According 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, Ice
41、land, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. 1) In preparation BS EN 12697-26:2012EN 12697-26:2012 (E) 7 1 Scope This European Standard specifies the methods for
42、characterising the stiffness of bituminous mixtures by alternative tests, including bending tests and direct and indirect tensile tests. The tests are performed on compacted bituminous material under a sinusoidal loading or other controlled loading, using different types of specimens and supports. T
43、he procedure is used to rank bituminous mixtures on the basis of stiffness, as a guide to relative performance in the pavement, to obtain data for estimating the structural behaviour in the road and to judge test data according to specifications for bituminous mixtures. As this standard does not imp
44、ose a particular type of testing device the precise choice of the test conditions depends on the possibilities and the working range of the used device. For the choice of specific test conditions, the requirements of the product standards for bituminous mixtures should be respected. The applicabilit
45、y of this document is described in the product standards for bituminous mixtures. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the
46、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 12697-27, Bituminous mixtures Test methods for hot mix asphalt Part 27: Sampling EN 12697-29, Bituminous mixtures
47、Test methods for hot mix asphalt Part 29: Determination of the dimensions of a bituminous specimen EN 12967-31, Bituminous mixtures Test methods for hot mix asphalt Part 31: Specimen preparation by gyratory compactor EN 12967-33, Bituminous mixtures Test methods for hot mix asphalt Part 33: Specimen
48、 prepared by roller compactor 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 stiffness =E BS EN 12697-26:2012EN 12697-26:2012 (E) 8 3.1.2 complex modulus relationship between stress and strain for a linear visco-elastic material submitted to a sinusoidal load wave form at time, t, where applying a stress sin ( t) results in a strain sin ( (t ) that has a phase angle, , with respect to the stress NOTE 1 The amplitude of strain a
