chapter 3 rigid pavement - DOT On-Line Publications - Department ...

I-60 Lmqitudinal CrackFnq - l988
in Jme 3, 1988 project PZrSmnd m 35-tnileS Of a yet-to-be owed to traffic
sectian of I-61 noted Some lmgitudinal Cracking m both sides of tfie
transverse mtractim joints in the portland cement ancrete (pee) pavement.
At first, the lmgitudinal aaching appeared to be limited to a carple of
interchange ranps, however, it was swn fovld to be scattered throu#xut the
approximately eleven miles of pet pavement having w shoulders. The omer 24
miles of yet-to-k opened section of I-61 consisting of pee pavenent having
asphalt stroulders was not experiencing any cradling. The cracks were
typically 12-18 inches in length and were located approximately 9-12 in&es
from the mainline/shoulder joint. wlen cracking octlPled, me cracks wcTe
ahays present m both sides of the transverse cmtractim joint and near the
inside and cutside of the nU.rUne/shoulder 1mgitudina.l joints.
BACKGROUND
The eleven miles of WC pavenent were placed in 1987 ulder 3 paving projects
involving two cmtractors. me mainline pee consists of l2-indr jointed,
mesh-reinforced concrete pavement having 40.foot joint spacing. The typical
sectim consists of two travel lanes with an additlmal truck cllnbing lane
for several sectims. The tied sharlders ansist of 10.in* ncn-reinforced
ccncrete pavement having 200taot joint spacing. The shoulders art tied to the
mainline pavement with had< bolts. Free draining base material consisting of
qgregate (No. 57 stme) treated with two percent of paving asphalt by wei@
’ the aaregate is in place breath the mainline and shoulder pee pavement.
bgitudinal and transverse joints were sawed and sealed using a low module
Aliccnc seaLant. This section of I-64 was scheduled to be opened to traffic
on July 15 so it was tiperatfve.mat me cause of me prcblem be cktermined
and an acceptable solution fomd before the road was opened.
On Jcne 6, Messrs. W.T. KeUey, D.M. Hart and D.J. VoeU