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Layout of Transportation Engineering Lab:
• Objective: The objective to study the layout of the Transportation Engineering lab is to get
familiar with the dierent equipments and machines placed in the lab. And to
understand the working of these instruments and there practical implementation in
Transportation system.
• Ring and Ball softening point Apparatus: t is used to note the softening point of !ituminous materials. "oftening. The
reason for measuring the softening point is that the bituminous materials don#t
have speci$c %elting point. point is that temperature at which the specimen
under test becomes soft enough to allow a steel ball of speci$c dimension &'(
mm) to fall a required distance under test condition
Saybolt Viscometer:
This apparatus is used to determine the *onsistency and +iscosity of !itumen
and to study the +ariation of viscosity with Temperature.
ortable s!id resistance Tester: This instrument is used to check the skidding. !eing portable this instrument
can be taken anywhere for testing. After measuring the skidding precautionary
measures are to be taken. t is found that the skid resistance of roads,highways
starts decreasing as its open to tra-c.
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enaterometer:t is used to classify the bitumen as "oft or hard bitumen depending upon the
penetration into the material. enetration is noted when /00g needle
penetrates into the bitumen for (seconds.
Los Angeles Abrasion "ac#ine: This instrument is used to determine the resistance of coarse aggregates against
wear i.e. resistance of coarse aggregate to impact1 in a rotating hollow cylinder
having steel balls,spheres. This machine consists of a hollow steel cylinder closed
at both ends that is supported by shafts on two sides. The cylinder rotates about
a2is of shaft in hori3ontal position. An opening is provided to introduce the
material into the hollow cylinder which must be closed during testing.
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$uctilometer: This machine is used for determination the ductility of bituminous materials by
measuring the elongation before breaking when two ends of specimens are pulled
apart at a speci$ed speed and temperature. %oulds $lled with bitumen are installed
in the machine1 with one end $2ed other end is moved on opposite side at a speci$c
rate &( cm,min). t is recommended that the sample must not break or sagged down
before /00 cm elongation.
%ine sieve s#a!er: t is used for the sieve analysis of $ne aggregates.
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&ot latet is used to dry the aggregates samples.
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Electric Oven:
It is used to dry the aggregate samples and its capacity to heat the samples is up to 20000C.
Asp#alt "i'er:
It is used to mix asphalt with aggregates for mix design purposes.
%an circulate oven:
It is used to find the bitumen loss on heating.
Speci(c )ravity assembly:
t is used to $nd out the speci$c gravity of aggregates samples.
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*eig#ing balance: t is used to weigh the sample for various tests. t has capacity of 400g and
5.* of 0.00/g.
+leveland open +up ,as# point tester:
t is used to determine the 6ash point and $re point of bitumen. After passing 6ame
above the heated bitumen if bitumen catches $re for an instant then that point is
called 6ash point.
"ars#all Stability mac#ine: t used to $nd out the strength of samples of bitumen mi2 design.
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S#ape Testers:
• 7lakiness 8auge
• Elongation 8auge
The particle shape of the aggregate mass is determined by the percentage of flaky and elongated
particles in it. Aggregates which are flaky or elongated are reasons for weakness of mixes. For
determining flakiness index. article is flaky when its thickness !smallest dimension" is less than
0.# of the mid$si%e of the sie&e fraction. 'auge has se&en labeled slots for rapid hand trying of
particles from each of the se&en sie&e cuts. The mass of all flaky particles !passing appropriate
slots" as percent of the sample is the flakiness index
Flakiness 'auge
Elongation Gauge
Angularity -umber "ould:t is used to $nd out the angularity number of an aggregate specimen.
Angularity describes the absence of roundness. 9 A metal cylinder of about 4
liter capacity.Temping rod of circular cross9section1/:mm ;1 :0cm in length.
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+oarse sieve s#a!er:
It is used for the sie&e analysis of coarse aggregates.
Electric Oven:It is used to dry samples. Its capacity to heat the samples is up to 2000 C.It is used to e&aporate the
moisture of aggregates samples.
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