as highway engineering equipment

8/13/2019 as highway engineering equipment

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Asphalt Content Furnace:

The Asphalt Furnace has an internal electronic

balance automatically monitoring the sample weight

throughout the ignition process, saving valuable

technician time and increasing productivity in the lab.

Simply enter the sample weight and calibration factor

for your particular mix design, place the sample in the

furnace chamber and press "start." When the test cycle

is complete, the system automatically ends the test and prints the results. A periodic "beep" alerts

the technician that the test has ended. Pressing "stop" unlocks the chamber door and the sample

can be removed and allowed to cool for gradation analysis.

Los Angeles Abrasion Machines:

The L. A. Abrasion Machine is used as a quality

control tool for aggregates, including crushed rock, gravel and

slag. The testing method determines the degradation when

subjected to abrasion, attrition, and impact and grinding. The

sample is placed in the drum along with a hardened steel

abrasive charge. After rotating the drum a specific number of

times, samples are removed and examined for wear.


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Penetration tester:Penetration tester The instrument is suitable to

determine the penetration of highway bitumen, modified

asphalt, as well as liquid petroleum asphalt or residue of

emulsified asphalt after evaporation.

.The penetration of bituminous materials is expressed

as the distance that a 100 g0.05 g standard needle

vertically penetrates into the sample without measurable

fraction in 5 s at a constant temperature bath of 250.1

. It is used for evaluating the consistency of asphalt.

The larger the penetration is; the thinner and softer the asphalt is.

The instrument can also be used for inspecting industry materials such as solid granule,

powder, colloid, as well as food materials such as cream, glycine, etc. It has been widely used in

the field of food industry, highway and traffic departments and other departments.

Automatic Proctor-CBR compactor:

Provides a fully automatic uniform compaction of

specified effort, thus ensuring repeatable test results and

eliminating any operator fatigue during the tests. It

consists essentially in a robust steel frame housing the

motor speed reducer and lifting mechanism which assure

uniformity of drop height at all specimen levels. The

rammer pick- up has a cam system for accurate height

release and is made of highly resistant material for

trouble free long life. Compaction cycles conforming to the mentioned Standards, can be set on

the digital control panel.


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Buoyancy balance:

Digital high capacity scale offers 16000 gram

weighing capacity with 0.1 gram readability for highly

accurate weighing results. The digital scales vacuum

fluorescent display makes it easy to read results in any

light whether conditions are dark or light. The digital

electronic scale's stainless steel weighing platform

creates a easy to clean, durable, long lasting scale.

Road skid resistance tester :

The apparatus is suitable for both site and

laboratory applications to perform two types of

tests:

For measuring pavement (road asphalt) surface

frictional and skid resistance properties.

For polished stone value tests on aggregates

(curved specimens) from accelerated polishing

tests.

Water bath :

Provides water at the required temperature

of 25 0,1C.The unit consists of a stainless steel

water bath 10 litres capacity with wool insulation,

immersion heater with digital thermostat, motor


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pump with connections, cooling coil device, current water operated, to maintain a constant

temperature of the bath whenroom temperature is slightly higher.The bituminous sample is

immersed into the water bath, and placed on the penetrometer on

Portable Sieve Shaker:

The Portable Sieve Shaker will hold 8 Full Height 8"

sieves, pan and cover. Motor driven in two models, one for 110

V, 60 Hz, the other for 220 V, 50 Hz.Off-center bearings


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provide an orbital motion that reduces clogging and quick action clamps hold the sieve stack

securely.

A 60 minute timer is provided with a "hold" position to permit continuous running. Heavy gauge

steel, painted exterior. Overall dimensions are 38 in H x 15 in W x 13 in D (97 x 38 x 33 cm.).

The California Bearing Ratio (CBR) :

CBR test is a simple strength test that compares the

bearing capacity of a material with that of a well-graded crushed

stone (thus, a high quality crushed stone material should have a

CBR at 100%). It is primarily intended for, but not limited to,

evaluating the strength of cohesive materials having maximum

particle sizes less than 19 mm (0.75 in.) (AASHTO, 2000). It

was developed by the California Division of Highways around

1930 and was subsequently adopted by numerous states,

counties, U.S. federal agencies and internationally. As a result,

most agency and commercial geotechnical laboratories in the

U.S. are equipped to perform CBR tests.

Material uses in asphalt testing:

1. Asphalt:The black cementing agent known as asphalt has been used for road construction for

centuries.Asphalt is called a bituminous material because it contains bitumen, a hydrocarbon

material soluble in carbon disulfide. The tar obtained from the destructive distillation of soft


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coal also contains bitumen. Both petroleum asphalt and coal tar are referred to as bituminous

materials.

2. Aggregate :Aggregates (or mineral aggregates) are hard, inert materials such as sand, gravel, crushed

stone, slag, or rock dust. There are two types of aggregates fine and coarse aggregate

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