Newsletter Winter 1996 - Nevada Department of Transportation

WSffi$ffiffiW
Volume6 NumberI
theNercdaDeparfrnent
Il,lPROVED
P6vE1-l
EllTPERFO
BHf,1{CEWtil{ pREC0l'tp6cflO1l
Sponsoredby FIfWA, Throughthe
Priority Technologles
Program
Premaurefailureof longitudinal
jointsbetween
asphaltmatsis a major
sourceof pavement
failurein Novadaand
acrossthecountry.A lackof sufficient
asphaltmaterialandcompaction
in tbe
joint sectionis indicatedasthemain
/xeason for hesejoint failures.
TransTech
Systemr,Inc.,of Albany,
NewYorh manufactures
attachrnents
to
aspbaltpaverswhichaddress
thisissue.
TheJointMakerSystemautomafes
proper
longitudinaljoint consfudionpmcesses
andallegedlydelivenpavements
where
Lverage
densitiesin thelongitudinaljoint
sections
arenearlyequal0oavetage
densities
in tbefull rnatuel.
Cunently,thistecbnology
is
underutilized
becauremoststafp
deparmennof Fanrporadon,including
NDOT,donotre4uirecompaction
tpsting
in tbejoint sections,Intwt" NDOT
currentlyrequirescompaction
tes6to be
takena minimumof onefoot ftom tbe
joint to ingurethattestresul8
longitudinal
represent
theaverage
matcompaction.In
tbetypicallylow.bidcontracting
environment
tbatcurrentlyexis6
tluoughoutmuchof t[o industry,
con8actingfirmsnaturallyrespond
directlyto thecontractrequiremenfs
placenuponthemby theircustotrlerr,
witb little or no incenfivefor voluntarily
goingbeyondthosereguiremente,
Anotherreluolrfor theunderutilization
of
improvedjoint construction
technology
mayincludetbegeneralporception
by
manypavement
ownerstbatpaving
contractors
do nothaveanavailableand
cost.effective
mothodfor providing
joinr
bigherqualitylongitudinal
construction,
It is tbeindustry'sunderutiUza$on
of
availableandinnovativotcchnology,
such
asTranrToch'e
JointMakerSystem,
tbat
ledto theestablishment
of tlrePriority
Technologies
Program
andoNDOT's
curent participationwitb FHWAin
tootingtboJolntMakerSyrtomto
detormins
its effecdveness
in irnproving
our longitudinaljoint conrtruction
t€chnigues,
ISTEA,Section6005,osablished',6n
appliedresrlxchandtpchnology
progran
(Cpntinuedon Nett Page)
pBotECT
DEiloltsrRaTtolt
ft9, t7
'Vldeo Inrpectbn of .Htghway
Edgedralnr"
Relativelynewin someareasof fbo
counFy,NDOTonlyrecentlybeganusing
higbwayedgedrains
a3a toshnigue
for
NDOTpersonnel
wwe re,cently
preserving
be
andexfendingtbelife of
fortunaterecipientsof theFHWANpvada'rHighwayt,Whilowebave
eponsored
Demonstsafion
Proleg-No, 87, lefiwd mucbaboutrbedpsignof
edgodraine
throughtheexporiencar
of
of Hig[way
"Vid€oInspection
otherhigbway
agencies,
NDOT
is
Edgedrainr".Thisvideofechnology
was
in tbeareaof
dsmonsrarcd
in LasVegason Septerrber f#ftafulyarwwcrmnor
maintaining
tbeee
systomr,
Fortunafely,
17th M laterprarented"
froma design
tbeFHWAoffice of Tecbnology
srandpointin CarsonCrty, Ilwas evident
Applieationrrecognizsdssrfafss'ngedr
b1'6e responses
of tboeeinvolvedtbaf
in thisarpaanddeveloppd
a
thgreis a lm n b leun& aboutthe
projecton dr$nab|r,
demonstrgion
inspeoffun
a& maintenawe
of highway
pavempnf
tyff€ms,ledby 6eir veryown
edeednnns,
Gprt iwcdn Pegc 1)
Paga I
Reseqrchqnd
Fqll lssoe,1996
Revieur
For this PTP project,the Federal
Administration'sNevada
Hiehwav
Pre{ompcction
piiisiori purchasedtwo JointMaker
for thepurPoseof accelerating
Systemsfor NDOT. The equipmentwas
testing,evaluation,andimplementationof iistalled on the two paverswhichwere
technologieswhich aredesignedto
usedduring the 1996seasonto paveUS
areaeastof Carson
improve the durability, efficiency,
50 in the S-tagecoach
impact,productivity,and
enuironmental
City, Nevada-.Within this l0-mile section
safetyof highway,transitandintermodal
of US SO,approximatelyeightmiles of
transportationsystems".As a meansto
onelongitudinaljoint wereconstructed
portion of
addr6ssthe implementation
usingthe Joint MakerSystem,leaving
Section6005,the Priority Technologies
the r-emainingtwo milesasa control
paving
Program(PTP)wasdesignedexpresslyto
sectionusing conventional
the deploymentof new or
accelerate
techniques.NDOT will continueto
technologyby
innovativetransportation
monitor theperformanceof this
the successfultestingandevaluationof
loneihrdinalloint overthenextthree
yeaiswith a hnal reportto bepublished
technologieswhichhavehigh potential.
for brinsingreal benefitsto transportatlon by July 7,1999,Providingcost_
installationprocedures,
users. One-uniquefeatureof thePTPis
c6mparisons,
overallbenefitsto
its chargethat activitiesbe freld office
densitycomparisons,
initiatei andmanagedfor the application the department,andan implementation
plan if applicable.
andevaluationof transPortation
technologythathasnationalor regional
the PTPis a
sisnificanLe.In essence,
Edge
fr6td initiated andmanagedExperimental
clctronicrensing
norrcontqct
6
Projectsprogram.
control sFtem thot cotomqticqlly
positionsthe screedendgatQin ProPer
blorirnity to the coldmot to inroreprecise
mqt qlignmcnt.In qdditionto the smsor
snit, this sFtQmincloderthe Edge
Follower c6ntrol onit, foillqfe clqrm, qnd
olt necerscryccblingond moonting
hordwcrc.
( Continued fronr Page I )
loint l'lqker
Thir mechcnicaldc'vicePlwider for
the plqcemcntof odeqootcorphcltmix to
qchiwe high dmriU, intedockcd
qggrcAqtelointconstrodion.lhe prodoct
mokctsond
piifqge inclodestwo-ioint_
and left side kidrer Plqtes.
In additionto imProvedPavement
quality and thepotentialfor extended
daverientlife, this newpavingtechnolr
is designedto providesubstantialsafeq
il.:-fi;';;"d ;;ielvI
ffi#i'oi thJr.b
membersthat wiil no
is expectedfor crew
I
lons6rbe requiredto spendtime exposedI
to tiaffic duringtherakingof longitudinalI
ioints. In addition,thereportedreductionI
in time requiredto completemostpaving I
iobswill alsoreduceworkers'exposureto I
iraffic andlessdisruptionsto the driving I
public aswell. Takinginto accountthe I
reduced
iotential safetyimprovements,
I
l
fill failed
to;;;
coststo
maintenance
mainrcnance
potentialfor
longitudinaljoints, anda po.tential
it would
overalllower pavingcosts,rt
ttrisprojectwaswell
certainlyappearthattttis
worth the time andeffortrequiredby all
involved.
involved.
I
POLYCO6RD'S
1{FORCI1{G Ff,BRIG
ENT.REI
P6VEM
ProdttctEvqloqtionCommittcc
PECREC6P
sEPr.il,1995 E DEC.lo,1995
'Doe to delcYsbeYondoor control,
thc Fotl1996issacof this newrlettet
was not poblished.The SePtembcr
ll,l995 PECmeetingreccpis inclodcd
in thir irsae.
Page 2
First reviewedby the PECduring the
March 1996meeting,thePolYguard
fabrics(wovenand
pavement-reinforcing
non-woven)areviewedaspotentiallyusefulmaterialsfor specificoveday
projectsrequiringselectiveretro-reflective crackprotection.Unsuitedfor
applicationon roadwayshavingwidespreadcracking,thesefabricsareintended
for useon individualpavementcracks
consideredtoo largeto be controlledby
the thinner,moretypicalreinforcement
fabricsthat areintendedfor application
overentireroadwaYsections.
upcomingoverlay
After researching
applicationof
projectsfor an appropriate
I
I
I
I
I
I
I
I
l
thesefabrics,the MaterialsDivision
I
a field testsiteon Charles- |
recommended
ton ParkRoad,nearLas Vegas.This
I
locadonwas selecteddueto the sizeand I
numberof cracks. In addition,it provides I
enoughroomto testbothproductsalong I
with a controlsectionusingtypical
I
NDOT strategiesfor thecontrolof retro- |
reflectivecracking.
I
from the I
Basedon recommendations
MaterialsDivision andDisuict I, the
-s\ I
committeeapproveda field testof botir
theNW-75 and665 pavementreinforcir-fabrics. I-ook for anupdateon this freld
testin upcomingissuesof the RTR.
Researchsnd TechnologyRevieur
Foll lsrue,1996
sealsfor our bridge
6DV61{CEDcompression
expansionandgowth joints, therehas
DRFIlIFGEbeena lot of productdevelopmentin this
waterproofexpansion-joint
systemusesa
backerrod to supporta thermoplastic,
polymericsealant,coveredwith an eightareadueto the manyproblemsassociated inch steelbridgingplatethatis then
coveredwith a compactedbinder/
with joint sealingsystemsandmaterials
aggregatematrix. Field testedfor the
overall.
sametfuee-yeuperiodalongsidethe 902
RCStestjoints, this expansion-joint
The differenttypesof bridgejoint
systemwasalsofoundto provide
systemspresentedto the Product
EvaluationCommitteeduringthe pastsix satisfactoryperformancewith no evidence
of damageor joint leakage.
yearshasrun thegamutfrom simple,
Mr. Rick Foster,ADS representative,
joint
sealants,to
silicone/rubber
provideda presentationand answered
Basedon recommendations
ftom the
elastomericneoprene"bladder"proftles
questionsconcerningtheir high-density
joint
fieldBridge
Division
and
their
overall
adhered
to
epoxy-coated
that
are
polyethylene(HDPE),flared,culvert end
pneumatic testperformance,the committeeapproved
walls
installation,
under
during
sections.Havingalreadyapproveda
pressure.The threenew bridge systems
all threeproducts.TheJeeneJoint
similarproductlast year,the committee
Systemhasbeenapprovedfor useon new
PEC
meeting
the
approved
at
September
was careful to ensurecomparablequality
andrehabilitationprojects.The othertwo
Jeene
Joint
include:
Watson
Boman's
questions
comparing
the
two
through
(rapid- products:Dow Corning's902RCS and
RCS
Dow
Corning's
902
System;
products. Mr. Fosterprovided
the Koch BJS,areapprovedprimarily for
curesilicone);andKoch's BJSasphaltic
informationabouttheproduct'sdesign,
joint rehabilitationwork wherethejoint
plug
design.
in answerto
material,andIfV resistance,
widths ande;pectedmovementsare
a varietyof questionsfrom thecommittee.
within
manufacturer's
installation
was
frst
The
Jeene
Joint
System
HDPE
He informed the committeethat
recommendations.
All
threeof thesejoint
presented
1990,
NDOT
in
to
September
endsectionshavebeenin usethroughout
will
continue
to
be monitoredfor
systems
and
has
since
by
Hydrozo,
Incorporated,
thecountryfor thepast30 yearsandhave
long-termperformance.Additional
part of Wason Bowman's
become
a
years
to
life
span
of
50
70
an expected
NDOT installationsof thesejoints are
productline. After approvalfor field
undernormalconditions.
growth
recommended
on a limited basisat
testing,it wasinstalledin several
joints
varying
locations
to determinetheir
(oints
approach
between
the
bridge
Basedon Mr. Foster'spresentation
pavement)on bridge performance
underdifferentclimatic and
roadway
slab
and
the
andthe committee'sdesireto orovide
traffic conditions.
structuresin theLas Vegasarea. The
Aeased competitionin this irea, the
principal
responsible
for
investigator
i I{DPE end sectionwas approvedfor
providingfinal reportson all threejoint
basisat the
useon a case-by-case
hincipal
discretionof District Maintenanceandthe systems,ToddStefonowicz,
that
after
five
Bridge
Engineer,
stated
HydraulicsSection.It is expectedthat
years
intact
remained
fully
the
Jeene
Joint
provide
the
I{DPE endsectionswill
to
the
approach
completely
bonded
and
with a broaderrangeof
department
slabandthe concretepavementwith no
culvertmaterialsto chooseftom when
joint leakageevident.
designingfor the variableconditions
foundthroughoutNevada. In particular,
Dow Corning's902 RCS was
HDPE end sectionsprovide an excellent
installed
on theN. McCarral bridgeover
choicewhenfacedwith the high-pHsoils
First reviewedby this committeeon
Reno,during the summerof
US
395,
in
found in different areasof our state.
1993. It wastestedas a single-component September13,1.994,theElastoflex60C
systemdirectiyadheredto thejoint walls
crackfillerhassuccessfully
completeda
with no headeror nosingmaterialused. It l5-monthfield test on SR290, northof
wasalsotestedasthe sealantcomponent Winnemucca.Theprincipalinvestigator
Incorporated's
in SiliconeSpecialties,
for this field test,Craig Crawford,Distict
BJSsystemwhichincludesa two-part
III HighwayMaintenanceSupervisor,
polymericnosingmaterial. While the SSi statedin his final reportthattheproduct
nosingmaterialis still underreview the
performedvery well. It remainedpliable
902 RCSdid proveitself to be a durable, andbondedto the asphaltpavementwith
low-modulusexpansion-jointsealantthat no appa.rent
lossof materialthroughout
is particularlywell suitedto sealing
the testperiod. Includedin this testwere
walls without theneed
irregularly-shaped
two controlsectionsusingNDOT:
for ajointheaderor nosing.Todd
approvedcrackfillersalongsidethe
years,
this
reporledthat after three
Elastoflex
60C.
productperformedwell in both test
Leavingthe metaphoricalbridgesto
our politicians,NDOT BridgeEngineers installations,showingno evidenceof
Basedon Craig'srecommendation
Ieakageor bondingproblems.
xsle busycompletingtheir final reports
andits performance
ascomparedto that
liree newbridgejoint systemsthat
products,
the
two
control
of
the
ir."€ beentestedover thepastthreeto
TheKoch BJSasphalticplug system
committeeapprovedtheMaxwell
five years.While the departmenthashad wasalsotestedon theN. McCarran
Elastoflex60Ccrackfillerfor additionto
usingmechanicallyvery goodsuccess
BridgeoverUS 395,installedduringthe
the approvedlist ofType D crackfillers.
fixed steelandneoprenestrip sealsand
summerof 1993.This smooth.
SYSTEM'S
lligh0ensity
PolyethyleneFlsred
CglvertEndSections
MOmrEtL
PRODOCT"S
ET6STOFLEI(
5OCCRfiCIGITLER
TTIREE
]IEWBRIDGE
torlfT SYSTEMS:
wFnsoil Bouullf,ll's
tEEl{E'OrNr,
902
DOWCORNING',S
qndKOCII'S
BrS
RCS,
Page 3
(ContinuedfromPage
I)
everyonein attendance.Shefound that
while many NDOT maintenance
personnelwereawareof theedge&ains
edgedrainguru, Mr. Bob Baumgardner. currently in place,they werenot at all
familiar with the tools and techniques
As an integralcomponentof FHWAs usedin thet maintenance.During the
overall project on drainablepavement
CarsonCity slide-showpresentation,
it
systems,the "Video Inspectionof
wasalso conveyedby membersof
Highway Edgedrains"project was
MaintenanceCrew 3, from District II. that
designedto specifically demonstratethe
they knew very little aboutproper
effectiveness
of closed-circuitvideo
edgedraininspectionandmaintenance
inspectionof edgedrainsin the field.
techniques.It wasgenerallyagreedthat
According to Mr. Baumgardner,it became this demonsfrationprovidedan invaluable
evident early on in the developmentof
opportunityfor NDOT employeesto
edgedrainsthat many of ttreroadways
cometogetler on this subjectand to
incorporatingthem werenot
developa greaterunderstandingof
demonstratingthe expected
everyone'srole in the design,
improvements. While someedgedrain
constructionandmaintenanceof
problemswere obvious throughcareful
edgedrains.While it was satisfyingto
visual inspection,otherswere
hearthat the open-loop,segmenteddrains
undetectablewithout digging them up or
that we arecurrently using werealso the
finding a way to actually inspectthem
edgedraindesignmost recommendedby
internally. And so was born the useof
Mr. Baumgardner,it was somewhat
closed-circuitvideo cameratechnology
disappointingto learn that we did not yet
for edgedraininspections.
appearto havean edgedraininspection
strategyin place.
After the demonstrationin Las Vegas,
Patty Mamol4 District I Assistrnr District
Over and over again,Mr.
Engineer,Maintenance,commentedthat
Baumgardnerstatedthat he could not
this was a very beneficialproject for
overemphasizethe importanceof careful
Dcmo1{o.t7
NevadaDepartmnentof Transportation
1263SouthStewartStreet
CarsonCity,Nevada89712
inspectionandappropriatemaintenance
strategiesto ensurethesuccessful
-applicationanduseof edgedrains.And
in tle end,Mr. Baumgardner
left us wil
oneoverridingmessage
aboutedgedrains:
"If you're goingto build tlem, design
themto be maintained.If you'renot
going to provide the funds to maintain
them,don't build them."
Rcseqrchond Tcchnology Rcvlcw
is publishedquarterlyby rhe NDOT
ResearohDivision
The NevadaD.ptrtmant ol
Transportttlon
1263S. Stcwrt Stro',t
Carcon Clty, N.vtda 89712
Phone(702) 888-7803
lf you have@mments,queslions,
or needadditionalinformation
regardingarryof the topics
discussedin this issue,please
contaa Alan Hllton.
Rasearoh/Special
Studies
Manager