Pavement
Pavement
Performance
Performance
Evaluation
Evaluation
and
and
Rehabilitation
Rehabilitation
Design
Design
Delft University of Technology
Delft University of Technology
The Netherlands
The Netherlands
André A. A.
•
• RoadRoad usersusers demanddemand a a certaincertain levellevel ofof serviceservice inin termsterms ofof::
-- safetysafety ((geometricgeometric design, design, skidskid resistanceresistance),),
-- drivingdriving comfortcomfort ((evenesseveness, , noisenoise inin thethe carcar),),
-- appearanceappearance ofof thethe roadroad, ,
-- noisenoise andand airair pollutionpollution,,
-- vehiclevehicle operatingoperating costscosts.. •
• RoadRoad authoritiesauthorities are are responsibleresponsible for for keepingkeeping thethe roadroad andand thethe pavement
pavement inin suchsuch a a conditioncondition thatthat thethe useruser demandsdemands are are fulfilledfulfilled.. •
• User’sUser’s needsneeds mustmust bebe translatedtranslated inin technicaltechnical termsterms..
Introduction
Introduction
Maintenance
Maintenance
strategies
strategies
Condition
Condition
Time
Time
Minimum
Minimum acceptanceacceptance levellevel
Usage
Usage dependentdependent maintenancemaintenance Condition
Condition dependentdependent maintenancemaintenance
Frequency
Frequency distributiondistribution of of maintenancemaintenance moments
•
• UsageUsage dependentdependent maintenancemaintenance, , repairrepair thingsthings afterafter a a certaincertain number
number ofof hourshours, , isis onlyonly possiblepossible ifif serviceservice lifelife cancan bebe predictedpredicted andand variation
variation inin serviceservice lifelife isis smallsmall.. •
• UnfortunatelyUnfortunately pavementpavement lifelife isis veryvery difficultdifficult to to predictpredict andand variationvariation in
in pavementpavement lifelife isis ““substantialsubstantial”.”. •
• ThereforeTherefore conditioncondition dependentdependent maintenancemaintenance isis thethe wayway to to gogo for for pavements
pavements andand conditioncondition monitoringmonitoring isis a a veryvery importantimportant issueissue.. •
•SoSo measuremeasure conditioncondition, determine , determine whatwhat isis wrongwrong andand design design maintenance
maintenance strategystrategy. . ThisThis isis whatwhat wewe callcall pavementpavement evaluationevaluation andand rehabilitation
rehabilitation..
Maintenance
•
• TechniciansTechnicians likelike to to discussdiscuss thingsthings likelike crackscracks, , rutsruts, crack , crack propagation
propagation, , polymerpolymer modifiedmodified mixturesmixtures, , plasticityplasticity indexindex etcetc, , butbut they
they shouldshould realiserealise thatthat legislatorslegislators andand usersusers don’tdon’t talktalk aboutabout pavements
pavements inin thosethose termsterms!! !! TheyThey eveneven don’tdon’t understandunderstand whatwhat wewe mean
mean!!!!!! •
• ItIt isis thereforetherefore ofof vital vital importanceimportance thatthat wewe as as technicianstechnicians makemake a a clear
clear translationtranslation ofof thethe user’suser’s ((legislatorslegislators) ) needsneeds inin thethe technicaltechnical things
things wewe are are talkingtalking aboutabout andand vice versa. vice versa.
Mismatch
Mismatch
between
between
legislators
legislators
/
/
users
users
and
and
technicians
•
• AssessingAssessing thethe conditioncondition ofof andand determiningdetermining thethe neededneeded maintenance
maintenance for for anan entireentire roadroad networknetwork isis anan enormousenormous tasktask. . Therefore
Therefore itit isis divideddivided inin taskstasks onon networknetwork andand projectproject levellevel.. •
• TypesTypes ofof questionsquestions askedasked, , informationinformation neededneeded andand answersanswers to to bebe given
given are are differentdifferent betweenbetween networknetwork andand projectproject levellevel.. •
• NetworkNetwork levellevel isis ofof importanceimportance for for legislativelegislative levellevel, , networknetwork andand project
project levellevel isis ofof importanceimportance for for administrativeadministrative//managementmanagement levellevel and
and technicaltechnical levellevel..
Network
•
• QuestionsQuestions askedasked::
-- do do youyou reallyreally needneed thisthis amountamount ofof moneymoney,,
-- whatwhat isis thethe effecteffect onon pavementpavement conditioncondition andand willwill user’suser’s complaints
complaints decreasedecrease,,
-- whatwhat isis effecteffect ofof a a lowerlower budgetbudget,,
-- whatwhat willwill happenhappen ifif wewe deferdefer maintenancemaintenance oror lowerlower thethe standards.
standards.
•
• NetworkNetwork levellevel: : largelarge amountamount ofof data data shouldshould bebe collectedcollected andand evaluated
evaluated inin a a shortshort periodperiod ofof timetime. . HighHigh speedspeed measuringmeasuring techniques
techniques are are necessarynecessary.. •
• To To answeranswer thethe questionsquestions itit isis notnot neededneeded to monitor to monitor entireentire networknetwork.. •
• EntireEntire networknetwork shouldshould bebe monitoredmonitored ifif oneone wantswants to to knowknow wherewhere the
the unsatisfactoryunsatisfactory spotsspots are. are.
Network
•
• QuestionsQuestions askedasked::
-- whatwhat isis goinggoing onon withwith thatthat pavementpavement,,
-- whatwhat do do wewe needneed to do,to do,
-- howhow muchmuch does does itit costscosts andand howhow shouldshould thethe maintenancemaintenance contract
contract looklook likelike,, •
• Project Project levellevel: : qualityquality ofof thethe data data isis ofof importanceimportance..
Project
•
• AboutAbout a a decadedecade agoago thethe onlyonly measurementsmeasurements thatthat couldcould bebe performed
performed atat anan acceptableacceptable highhigh speedspeed levellevel werewere::
-- ride ride measurementsmeasurements,,
-- skidskid resistanceresistance measurementsmeasurements.. •
• NowadaysNowadays wewe cancan measuremeasure almostalmost anythinganything atat highhigh speedspeed..
-- roadroad profileprofile ((e.ge.g. laser) ,. laser) ,
-- texturetexture (laser),(laser),
-- thicknessthickness (radar),(radar),
-- deflectiondeflection (laser),(laser),
-- skidskid resistanceresistance ((contactcontact measurementmeasurement),),
-- noisenoise ((soundsound).). •
• UnfortunatelyUnfortunately thesethese techniquestechniques are are notnot alwaysalways applicableapplicable ((costscosts, , availability
availability ofof equipmentequipment andand skillsskills, , etcetc).).
Measurements
Measurements
Measurements
on
on
project
project
level
level
•
• DeflectionDeflection measurementsmeasurements.. •
• Material Material testingtesting ((lablab. . InvestigationsInvestigations).). •
• HighHigh speedspeed measurementmeasurement techniquestechniques quite quite oftenoften havehave anan accuracy
Pavement
Pavement
damage
damage
is
is
due
due
to a lot
to a
lot
of
of
factors
factors
• • TrafficTraffic • • ClimateClimate • • SubsoilSubsoil •
• InteractionInteraction betweenbetween damagedamage typestypes; ; inin ourour mechanisticmechanistic designs designs wewe tend
tend to to treattreat variousvarious damagedamage typestypes as individual as individual parametersparameters. . ThisThis isis a
