ASTM_D_6433_-_20.pdf

Designation:D643320Standard Practice forRoads and Parking Lots Pavement Condition IndexSurveys1This standard is issued under the fixed designation D6433;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers the determination of roads andparking lots pavement condition through visual surveys usingthe pavement condition index(PCI)method of quantifyingpavement condition.1.2 The PCI represents the collective judgement of pave-ment maintenance engineers and is an indirect measurement ofpavement structural integrity(not capacity)and pavementfunctional condition indicators such as roughness.The PCI isnot intended to replace the direct measurement of ride,struc-tural capacity,or friction.1.3 The PCI for roads and parking lots was developed by theU.S.Army Corps of Engineers(1,2).2It is further verified andadopted by DOD and APWA.1.4 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific precautionary statements are given in Section 6.1.6 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Terminology2.1 Definitions of Terms Specific to This Standard:2.1.1 additional samplea sample unit inspected in addi-tion to the random sample units to include nonrepresentativesample units in the determination of the pavement condition.This includes very poor or excellent samples that are nottypical of the section and sample units,which contain anunusual distress such as a utility cut.If a sample unitcontaining an unusual distress is chosen at random it should becounted as an additional sample unit and another randomsample unit should be chosen.If every sample unit is surveyed,then there are no additional sample units.2.1.2 asphalt concrete(AC)surfaceaggregate mixturewith an asphalt cement binder.This term also refers to surfacesconstructed of coal tars and natural tars for purposes of thispractice.2.1.3 pavement brancha branch is an identifiable part ofthe pavement network that is a single entity and has a distinctfunction.For example,each roadway or parking area is aseparate branch.2.1.4 pavement condition index(PCI)a numerical ratingof the pavement condition that ranges from 0 to 100 with 0being the worst possible condition and 100 being the bestpossible condition.2.1.5 pavement condition ratinga verbal description ofpavement condition as a function of the PCI value that variesfrom“failed”to“excellent”as shown in Fig.1.2.1.6 pavement distressexternal indicators of pavementdeterioration caused by loading,environmental factors,con-struction deficiencies,or a combination thereof.Typical dis-tresses are cracks,rutting,and weathering of the pavementsurface.Distress types and severity levels detailed in AppendixX1 forAC,and Appendix X2 for PCC pavements must be usedto obtain an accurate PCI value.2.1.7 pavement sample unita subdivision of a pavementsection that has a standard size range:20 contiguous slabs(68slabs if the total number of slabs in the section is not evenlydivided by 20 or to accommodate specific field condition)forPCC pavement,and 225 6 90 m2(2500 contiguous square feet6 1000 ft2),if the pavement is not evenly divided by 225 m2or 2500 ft to accommodate specific field condition,for ACpavement.1This practice is under the jurisdiction of ASTM Committee E17 on Vehicle-Pavement Systems and is the direct responsibility of Subcommittee E17.42 onPavement Management and Data Needs.Current edition approved June 1,2020.Published June 2020.Originallyapproved in 1999.Last previous edition approved in 2018 as D6433 18.DOI:10.1520/D6433-20.2The boldface numbers in parentheses refer to the list of references at the end ofthis standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.2.1.8