ASTM_D_6433_-_11.pdf

Designation:D643311Standard 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 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.1.3 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.4 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 and health practices and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary statements are given in Section 6.2.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 2500 contiguous square feet,6 1000 ft2(225 6 90 m2),if the pavement is not evenly divided by 2500or to accommodate specific field condition,for AC pavement.2.1.8 pavement sectiona contiguous pavement area hav-ing uniform construction,maintenance,usage history,andcondition.A section should have the same traffic volume andload intensity.2.1.9 portlandcementconcrete(PCC)pavementaggregate mixture with portland cement binder includingnonreinforced and reinforced jointed pavement.2.1.10 random samplea sample unit of the pavementsection selected for inspection by random sampling techniques,such as a random number table or systematic random proce-dure.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 1,2011.Published July 2011.Originally approvedin 1999.Last previous edition approved in 2009 as D6433 09.DOI:10.1520/D6433-11.2The 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 States1 3.Summary of Practice3.1 The pavement is divided into branches that are dividedinto sections.Each section is divided into sample units.Thetype and severity of pavement distress is assessed by visualinspection of the pavement sample units.The quantity of thedistress is measured as described in Appendix X1 andAppendix X2.The distress data are used to calculate the PCIfor each sample unit.The PCI of the pavement section isdetermined based on the PCI of the inspected sample unitswith