Hot Bituminous Paving Checklist

7/27/2019 Hot Bituminous Paving Checklist

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HotBituminousPavingChecklist

1. Uponreceiptofplans,specifications,andproposal.A. ExaminethePlansandmakenotesofanyquestionsthatyouhave. Ifthereisaconflict

Planswill

govern

over

Standard

Specifications.

Supplemental

Specifications

will

govern

over

plans.

a. Scopeofwork.b. Getanoverviewofthepavingtobedoneontheprojecttounderstandwherethe

workistobedone.

B. Notes.a. ReadtheGeneralNotestodeterminedetailsthatareprojectspecificandnot

includedinthespecificationsthatapplytoHBPPaving. Plannotessupersede

specificationsifthereisaconflict.

C. Typicalsections.a. Typicalsectionsaredefinedbytheirstationing. Theremaybemorethanonetypical

sectionon

aproject.

Examine

all

typical

sections.

b. Newpavementthickness.c. Crossslopeofthepavedsurface.d. Numberofliftsneededtoachievethickness.e. Locationswherethetypicalsectionchanges.f. TypeofHBPmix.

D. BasisofEstimate.a. PlanquantityofBidItemsfortheproject. BidItemsarelistedbyspecification

sectionandcode.

b. Densityofmaterialusedtodeterminequantities.c. Typeandgradeofasphaltcement.d. Asphaltcementcontentusedtodeterminequantities.e. Typeandgradeofemulsifiedasphaltfortackcoat.f. Applicationrateofemulsifiedasphaltfortackcoat.g. Superelevationtabletolocateareasofsuperelevation. Atableshouldbemadefor

bothendsofeachtransitionshowingstationsandslopesforthestartandendofthe

transitionsandintermediatepointstochecktoachieveasmoothtransition.

E. PlanandProfile.a. Checkouthowthepavingfitsinwithotherconstructionontheproject.b. Locatewherethesuperelevationsandtransitionsarelocated.c. Locatefixturesthataretobeadjustedpriortoplacingthefinallift.

F. PavingLayout.a. Checkwheretypicalsectionschange.b. Examinetransitionstodeterminehowtogetfromonesectiontotheother.c. Determineareasthatwillbepavedoutsidethetypicalsectionssuchas

intersections,widenings,turnlanes,sideroadsorapproaches.

G. StandardDetails.a. Findstandarddetailsthatpertaintopavingoperationssuchasintersectionlayouts

andtrafficcontroloperationsforpaving.

H. StandardSpecifications.


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a. ReviewSection400oftheStandardSpecificationstorefreshknowledgeofrequirementsforthework.

1. Section401coverstheDescription,Materials,Equipment,ConstructionRequirements,MethodofMeasurement,andBasisofPaymentforPrime,Tack

andFogSeal.

2. Sections408,409,and410coverDescription,Materials,Equipment,ConstructionRequirements,MethodofMeasurement,andBasisofPaymentfor

BituminousPavement. Thepropersectionofthespecificationmustbeusedfor

theHBPbiditem.

3. ReviewallspecificationsreferencedwithinSection400. Oftenanotherspecificationwillbereferencedwithinaspecificationtosaveduplication. The

referencespecificationbecomespartofthespecificationreferencingit.

Materialsspecificationspertainingtotheworkwillbereferenced.

I. Proposal.a. LookatSupplementalSpecificationstobeawareifanyspecificationupdatesfromthe

StandardSpecificationshavebeenmade. SupplementalSpecificationswillgovernover

theStandardSpecifications.

b. ExaminetheproposaltofindSpecialProvisionsregardingpavingoperations. SpecialProvisionsarespecifictotheprojectandcoveritemsandconditionsthatarenot

includedintheStandardSpecifications. SpecialProvisionsgovernoverPlans,

SupplementalSpecificationsandStandardSpecifications.

J. ConstructionManual.a. ConsulttheSection400oftheConstructionManualtoreviewtheresponsibilitiesofthe

inspectorfortheworkbeingperformed.

K. Checkthequantitiesofthebiditemsinvolvedinthework. Plansaregenerallyaccuratebuterrorsdohappenanditismuchbettertofindthemearlytoavoidproblems.

a. Organizecalculationstoidentifywherematerialisplaced.1. Mainline2.

Shoulders

3. TurnLanes4. Acceleration/DecelerationLanes5. Sideroads6. Approaches7. Etc.

b. Determineaspreadrateformainlinepaving. Determinethevolumeofthepavementsectioninonestationandmultiplyitbythedensityofthemixtodeterminethetons/sta

thatwillbethetargettomeetplanquantity.

L. Prepareanynecessaryfieldbookstodocumentthework.M. Organizethedocumentationrequiredformaterialsacceptance.

a. Determinewhatmaterialsareacceptedbycertificationandwhichneedsamplingortesting.

b. Preparealistofmaterialsthatareacceptedbycertificationandatestingandsamplingfrequencyformaterialsthatrequirethem.

2. Priortostartofpaving.A. Makesuremixdesignisapproved.B. Checkstockpiles.

a. Identifytypeofmaterialandlocationofstockpilesformixproduction.b. Checkforcontamination.


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c. Checkforsegregation.d. Checkthatstockpilesareseparatedtopreventintermingling.

C. BinFeeders.a. Checkthatbinsareseparatedtopreventinterminglingofmaterialfromoverloadingthe

bins.

b. Makesurethatthefeedergatesareequippedwithchainsorsomedevicetoassureuniformfeed.

c. Checkcalibrationoffeedbins.d. Makesureascalpingscreenisinplacetopreventoversizematerialfromenteringthe

drumdryer.

D. AsphaltPlant.RefertoSection152oftheStandardSpecifications.a. Checktheslopeofthedrumtobesureitiswithinthemanufacturers

recommendations.

b. Seethattheplantisequippedwithtemperaturerecordingequipmentthatautomaticallyandcontinuallycontrolsmixtemperature.

c. Getcalibrationoftheflowmeterfromthecontractor.d. Consultwiththecontractortodeterminehowsampleswillbetakenduringproduction.e. Visitthecontrolshacktobecomefamiliarwithplantsettingsandoperation.f. Checkscalecertification.g. Checktheconditionofstoragetankstoverifytherearenoleaksandingoodcondition.

E. Equipment. RefertoSection151oftheStandardSpecifications.a. Rollersmustbeofsufficientweighttomeetspecificationsforappliedforce. Determine

themethodforcheckingthefrequencyandamplitudeforvibratoryrollers.

b. Checkpneumaticrollertirestomakesuretheyareinflatedtothepressurerangeinthespecifications. Tirepressurecannotvarymorethan5psibetweenanyofthetires.

c. Checktheconditionofthedistributorandbecomefamiliarwiththeoperationandinstrumentationnecessarytomonitortackapplication.

d. Truckboxesshouldbecheckedtomakesuretheywillnotleakorhaveimperfectionsthat

may

cause

mix

buildup.

They

should

have

tarps

available

to

cover

loads

in

the

case

ofcoldtemperatures. Tarpsshouldbecapableofcompletelycoveringtheboxandfree

ofholesandtears.

3. Duringpaving.A. PlantInspector.

a. Completedocumentationofproductionandpaving.1. MaintainuptodateandaccuraterecordsincludingInspectionReports,Mix

BitumenCutOffReports,mixtemperaturecharts,deliveredasphaltcement,

plantsettings,scalechecks,andothers.

2. Visitthecontrolshacktoobserveplantoperation. Notemixtemperatureandplantsettingstomakesurethingsarerunningsmoothlyandplantsettings

havenotchangedwithoutpropernotification. Mixtemperaturesthataretoo

highwill

break

down

the

asphalt

cement

and

reduce

the

life

of

the

pavement.

b. MonitortheContractorsoperationsattheplantsite.1. Stockpilesshouldbecheckedtomakesuretheloaderoperatorisnotgetting

materialfrombelowthepileorsegregatingthepileasheremovesmaterial.

2. Coldfeedbinsandconveyorsshouldbeexaminedtomakesurematerialisbeingfedconsistentlyinthecorrectproportionstothedrumandisnot

segregating.


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3. Trucksshouldbecheckedtomakesuretheyhavebeencleanedoutanddieselfuelisnotbeingusedasareleaseagent.

4. Lookatthesurgebinorsilotomakesureitisnotleakingmaterial.5. Observetrucksbeingloadedtomakesuresegregationisnotbeingcaused.6. Checktoseethattarpsareavailabletocoverloadsincoolweather. Tarps

shouldbefreeofripsandtearsandshouldbelargeenoughtocompletely

coverthebox.

7. Ingeneraltrytobeawareofanythingthatmaycauseproblemstothemixorontheroad.

c. SampleandtestmaterialsaccordingtotheFieldSamplingandTestingManual.B. PavingInspector

a. Distributor1. Checktheamountoftackinthedistributor.2. Checkthetemperatureofthetack. Ifitistoocoolitwillnotsprayproperlyandifit

istoohotitmaybegintobreakinthedistributor.

3. Collectsamplesasrequired.4. Makesurethespraybarisheated.5. Knowwhatthedilutionrateis.6. Makesurethepavingsurfaceisclean. Tackwillbondtodustanddirtonthe

roadwayandcouldbepickedupbytrucksandthepaver.

7. Checkthatallnozzlesareworkingproperly.8. Checkthebarheighttomakesurecoverageofthepavingsurfaceisuniform.9. Makesureanyverticalsurfacesaretackcoated.10.Recordthebeginningandendingstationsofeachtackshot.11.Aftertackisappliedchecktheamountoftackleftinthedistributortocheckand

recordtherateofapplication.

b. Rollers1. Makesurethereareenoughrollerstoproperlycompactthepavement.2.

Check

to

see

that

spray

bar

uniformly

applies

water

to

the

roller

drum.

3. Checkthatvibratorsareworkingproperlyandchecktheamplitudeandfrequencyofthevibrators.

4. Verifythemanufacturersrecommendedcontactpressureforpneumaticrollers.Checktirepressuresandmakesurealltiresareinflatedtothesamepressure;there

shouldbenomorethan5psidifferencebetweenanyofthetires.

c. Paver.1. Checkthatgradecontrolsystemisinplace.2. Checkthatscreedispreheated.3. Checkthatscreedvibratorsareworkingandinusewhilepaving.4. Makesurethehopperhasnomixfrompreviouspavingorothermaterialthatmay

contaminatethemix.

5. Makesurethereisnodieselfuelonthepavertocleanhandtools.6. Checktheaugerstomakesuretheyextendtowithinonefootofthewidthofthe

screed.

d. Paving.1. Makesurethereareisenoughtrucksandmaterialtoallowcontinuouspaving.

Makesuretrafficcontrolisinplaceandeverythingisinordertosafelycontrolthe

workzone.

2. Ideallythepavershouldneverstop.


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3. Checkthatthereisadequateguidanceforthepaveroperatortofollowtoproducestraighttangentsandsmoothcurves.

4. Collecthaulticketsforeachloadofmixdelivered.5. Checkthemixtemperature. Coldmixoracoldscreedwillresultintearingthe

pavementsurface.

6. Checkthatthereareblocksprovidedforthescreedtosetontoallowmaterialforrolldownatthejoint.

7. Makesurehandworkforthelongitudinaljointisdonepromptlysocompactioncanoccurbeforethematerialcools. Handworkshouldbekepttoaminimumand

excessmaterialshouldbewastednotspreadacrossthenewlypavedsurface.

8. Checkthetransversejointtomakesurethereisnobumpafteritiscompacted.9. Ifpavingtomatchanadjacentliftmakesuretoallowenoughmaterialfor2025%

rolldowntoachievepropercompactionatthelongitudinaljoint. Ifthereisnot

enoughmaterialthejointmaylooksmoothandsealedbutnothaveadequate

compactiontopreventearlyfailures.

10.Checkthepavementsurfacebehindthepaver. Thesurfaceshouldbeuniformandfreeofsegregation,streaks,dragsorshadows. Ifanyirregularitiesarefound

requestthe

contractor

to

correct

them.

11.Checkthewidthofthepavementsurfacetoverifytheplanwidthwillresult.12.Checkthicknesstoverifythatthedesiredthicknesswillbeachievedafter

compaction.

13.Checkthecrossslopetodetermineifthepropercamberisinthescreed. Agoodstartingpointisonehalfinchcamberinthemiddleofthesection. Thisallowsfor

rolldownresultinginconstantslopeaftercompaction.

14.Checkthesloughstomakesuretheyareattheproperslopeandcompacted.15.Checkthelevelofmaterialinfrontofthescreed. Thelevelshouldbeconstantat

themidpointoftheaugers.

16.Thehoppershouldbeatleasthalffullatalltimes.17.

Segregation

will

occur

in

the

hopper

as

it

is

loaded.

The

wings

should

not

be

dumpedduringpaving.

18.Wherefreshlyplacedpavementisnotconfinedbycurbandgutter,oranadjacentlift,begincompactionapproximatelysixinchesinsidethepavementedge. Where

thepavementisconfinedbegincompactionoverlappingtheedges. Compact

towardthemiddleofthesection.

19.Checkthespeedofthepaverswiththefrequencyandamplitudeofthevibratorstogetthebestrideresults. Itisimportanttoachieve810impactsperfoot,lessthan

thatmayproducearipplingeffectinthepavement. Excessiveimpactsoramplitude

maycausechecking.

20.Afteracompactionsequencehasbeendeterminedmakesuretherolleroperatorsfollowthepattern. Ifconditionschangeandanewcompactionsequenceis

necessarydetermine

apattern

that

works

and

follow

that.

21.Checkthepavementtemperaturetomakesurethecompactionsequenceiscompletebeforethetemperaturedropsbelow185degrees.

22.Checkbehindtherollerstoverifyplanwidthisbeingproduced. Checkthattheslopeacrossthesectionisuniform,ifitisnotadjustthecamberinthescreedto

correctit.


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23.Checkthesurfaceaftercompactiontomakesureitisuniform,dense,andfreefromirregularities. Thereshouldbenosegregation,streaks,tearing,steelrollermarks,or

checking.

24.Monitortherateofapplicationofthepavingoperationtomakeadjustmentstothespreadratetokeeponpacetomeetplanquantity. Comparetheresultstothe

calculatedspreadrate. Thisshouldbedoneapproximatelyevery500tons. Make

gradualchangestobringtherateinline. Spreadratesaredefinedbythetonsof

mixplaceddividedbythenumberofstationsbetweenthebeginningandending

stations. Itisalsoimportanttotrackthecumulativespreadrate. Ifthecontractoris

askedtoincreasethicknessbecausethespreadrateislowtheideaistogetbackon

tracktomeetplanquantity. Iftheadjustmentistoorapidorlaststoolonganother

correctionwillbenecessary. Itisnotgoodpracticetoconstantlychangethickness.

25.Priortoeachdayspavingdeducttheamountofmixpreviouslyplacedfromplanquantityandrecalculateanewspreadrate.

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