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1、 Reference number ISO 13473-5:2009(E) ISO 2009 INTERNATIONAL STANDARD ISO 13473-5 First edition 2009-03-15 Characterization of pavement texture by use of surface profiles Part 5: Determination of megatexture Caractrisation de la texture dun revtement de chausse partir de relevs de profils de la surf
2、ace Partie 5: Dtermination de la mgatexture Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 05:50:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 13473-5:2009
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6、PYRIGHT PROTECTED DOCUMENT ISO 2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address bel
7、ow or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2009 All rights reserved Copyright International Organization for Standa
8、rdization Provided by IHS under license with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 05:50:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 13473-5:2009(E) ISO 2009 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2
9、 Normative references. 1 3 Terms and definitions. 1 4 Significance and use of the megatexture indicators 6 5 Measurement and data processing principles 8 6 Test surface considerations 9 7 Measuring equipment. 9 8 Measurement method. 10 9 Data processing 12 10 Measurement uncertainty 15 11 Safety con
10、siderations during measurements 15 12 Test report . 16 Annex A (informative) Example of test report and graphical presentations 18 Annex B (informative) Measurement uncertainty . 24 Annex C (informative) Profile asymmetry issues 27 Bibliography. 29 Copyright International Organization for Standardiz
11、ation Provided by IHS under license with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 05:50:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 13473-5:2009(E) iv ISO 2009 All rights reserved Foreword ISO (the International Organization for Standardiz
12、ation) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be
13、 represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standar
14、ds are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Intern
15、ational Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 13473-5
16、was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise. ISO 13473 consists of the following parts, under the general title Characterization of pavement texture by use of surface profiles: Part 1: Determination of Mean Profile Depth Part 2: Terminology and basic requiremen
17、ts related to pavement texture profile analysis Part 3: Specification and classification of profilometers Part 4: Spectral analysis of surface profiles Technical Specification Part 5: Determination of megatexture Copyright International Organization for Standardization Provided by IHS under license
18、with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 05:50:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 13473-5:2009(E) ISO 2009 All rights reserved v Introduction Pavement surface texture largely influences factors such as noise emission caused b
19、y tyre/road interaction (Reference 7), tyre/pavement friction (Reference 8), and comfort, as well as rolling resistance and wear of tyres. Reliable methods of texture measurement are therefore essential. Texture is subdivided into micro-, macro- and megatexture according to ISO 13473-2. A method for
20、 measurement and calculation of a macrotexture indicator based on a profile measurement is specified in ISO 13473-1. A procedure for measuring macrotexture by the volumetric patch method is described in ISO 10844:19942, Annex A. Currently, no reliable and practical method of measuring pavement micro
21、texture in situ is available. This part of ISO 13473 aims to provide means of measuring and calculating megatexture indicators useful for pavement surface characterization. Megatexture is an important texture range lying between macrotexture and unevenness. This type of texture has wavelengths of th
22、e same order of magnitude as a tyre/road interface and is often a result of potholes or washboarding. Some common types of singularities, such as a single depressed or protruding spot on the pavement, will also show up in a texture profile spectrum as megatexture. Although some pavements, such as pa
23、ving stones, possess an intrinsic megatexture, it is usually an unwanted characteristic resulting from defects in the surface. The scope of ISO 13473 (all parts) does not include profile analysis of road unevenness, which is dealt with in ISO 86081. Copyright International Organization for Standardi
24、zation Provided by IHS under license with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 05:50:38 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=HP Mo
25、nitoring/1111111164 Not for Resale, 04/07/2009 05:50:38 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO 13473-5:2009(E) ISO 2009 All rights reserved 1 Characterization of pavement texture by use of surface profiles Part 5: Determination of megatex
26、ture 1 Scope This part of ISO 13473 specifies procedures for determining the average depth or level of pavement surface megatexture by measuring the profile curve of a surface and calculating megatexture descriptors from this profile. The technique is designed to give meaningful and accurate measure
27、ments and descriptions of pavement megatexture characteristics for various purposes. Since there is an overlap between megatexture and the surrounding ranges, the megatexture descriptors unavoidably have a certain correlation with corresponding measures in those ranges. This part of ISO 13473 specif
28、ies measurements and procedures which are in relevant parts compatible with those in ISO 13473-1, ISO 86081 and EN 13036-56. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For und
29、ated references, the latest edition of the referenced document (including any amendments) applies. ISO 13473-2:2002, Characterization of pavement texture by use of surface profiles Part 2: Terminology and basic requirements related to pavement texture profile analysis ISO 13473-3:2002, Characterizat
30、ion of pavement texture by use of surface profiles Part 3: Specification and classification of profilometers ISO/TS 13473-4:2008, Characterization of pavement texture by use of surface profiles Part 4: Spectral analysis of surface profiles ISO/IEC NP Guide 98-3:2008, Uncertainty of measurement Part
31、3: Guide to the expression of uncertainty in measurement (GUM:1995) IEC 61260, Electroacoustics Octave-band and fractional-octave-band filters 3 Terms and definitions For the purposes of this part of ISO 13473, the terms and definitions in ISO 13473-2, especially the following, apply. Copyright Inte
32、rnational Organization for Standardization Provided by IHS under license with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 05:50:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 13473-5:2009(E) 2 ISO 2009 All rights reserved 3.1 General terms 3.1.1
33、 pavement texture texture deviation of a pavement surface from a true planar surface, with a texture wavelength less than 0,5 m NOTE It is divided into micro-, macro- and megatexture according to 3.2. ISO 13473-2:2002 3.1.2 surface profile texture profile two-dimensional sample of the pavement surfa
34、ce generated if a sensor, such as the tip of a needle or a laser spot, continuously touches or shines on the pavement surface while it is moved along a line on the surface NOTE 1 The profile of the surface is described by two coordinates: one in the surface plane, called “distance” (the abscissa), a
35、nd the other in a direction normal to the surface plane, called “vertical displacement” (the ordinate). An example is illustrated in Figure 1. The distance may be in the longitudinal or lateral (transverse) directions in relation to the travel direction on a pavement, or any direction between these.
36、 NOTE 2 Adapted from ISO 13473-2:2002. NOTE 3 Texture profile is similar to surface profile but limited to the texture range. NOTE 4 “Texture wavelength” is a descriptor of the wavelength components of the profile and is related to the concept of the Fourier transform of a time series. However, math
37、ematically the correspondence is not exact. Note that vertical displacement (height) has an arbitrary reference. Key 1 vertical displacement 2 profile 3 texture wavelength 4 distance Figure 1 Illustration of some basic terms describing pavement surface texture 3.1.3 profilometer device used for meas
38、uring the profile of pavement surface NOTE 1 Current designs of profilometers used in pavement engineering include, but are not limited to, sensors based on laser, light sectioning, needle tracer and ultrasonics technologies. ISO 13473-2:2002 NOTE 2 Specifications for profilometers are dealt with in
39、 ISO 13473-3. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 05:50:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 13473-5:2009(E) ISO 2009 All rights reserv
40、ed 3 3.2 Ranges of texture 3.2.1 microtexture pavement microtexture deviation of a pavement surface from a true planar surface with the characteristic dimensions along the surface of less than 0,5 mm, corresponding to texture wavelengths up to 0,5 mm expressed as one-third- octave centre wavelengths
41、 NOTE 1 Peak-to-peak amplitudes normally vary in the range 0,001 mm to 0,5 mm. This type of texture is the texture which makes the surface feel more or less harsh but which is usually too small to be observed by the eye. It is produced by the surface properties (sharpness and harshness) of the indiv
42、idual chippings or other particles of the surface which come in direct contact with the tyres. NOTE 2 Figure 2 illustrates the different texture ranges, with approximate limits regarding their effects on vehicle- pavement interactions. ISO 13473-2:2002 Key texture wavelength fsp spatial frequency, c
43、ycles/m NOTE A lighter shade indicates a favourable effect of texture over this range, and a darker shade indicates an unfavourable effect. Figure 2 Ranges in terms of texture wavelength and spatial frequency of texture and unevenness and their most significant, anticipated effects Copyright Interna
44、tional Organization for Standardization Provided by IHS under license with ISO Licensee=HP Monitoring/1111111164 Not for Resale, 04/07/2009 05:50:38 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 13473-5:2009(E) 4 ISO 2009 All rights reserved 3.2.2 macrotexture pavemen
45、t macrotexture deviation of a pavement surface from a true planar surface with the characteristic dimensions along the surface of 0,5 mm to 50 mm, corresponding to texture wavelengths with one-third-octave bands including the range 0,63 mm to 50 mm of centre wavelengths NOTE 1 Peak-to-peak amplitude
46、s may normally vary in the range 0,1 mm to 20 mm. This type of texture is the texture which has wavelengths of the same order of size as tyre tread elements in the tyre/road interface. Surfaces are normally designed with a sufficient macrotexture to obtain a suitable water drainage in the tyre/road
47、interface. The macrotexture is obtained by suitable proportioning of the aggregate and mortar of the mix or by surface finishing techniques. NOTE 2 Based on physical relations between texture and friction/noise, etc., the World Road Association (PIARC), originally defined the ranges of micro-, macro
48、- and megatexture (Reference 9). Figure 2, which is a modified version of the original PIARC figure, illustrates how these definitions cover certain ranges of surface texture wavelength and spatial frequency. Note that ride discomfort includes effects experienced in and on motorized road vehicles and bicycles, as well as wheelchairs and other vehicles used by disabled people. NOTE 3 Adapted from ISO 13473-2:200