Plants and equipment used in highway construction
There are several equipment’s that
are specifically used in the final stages of construction or in the maintenance
of highways. They include scrapers, dozers, loaders and Excavators. They are
innovative products of superior quality, built on a tradition of integrity to
carry out the rapid expansion that is witnessed in the highway construction.
The construction of highways has 3
phases, rough grading -earthmoving, fine grading -sub-grade preparation and
surfacing, which includes gravel, concrete, asphalt, (or any combination of the
three). Compaction is a major element of highway construction and it goes a
long way to ensure maximum life of the road structure. Maximum compaction is necessary
for a great highway.
In the fine grading operations
there is a need to grade surfaces to very fine tolerances and changing the
moisture level in the material being compacted. The Machines which add moisture
are water trucks and graders and which reduce moisture levels include discs,
mixers, and graders.
Graders are used to create flat
surfaces
In the Paving stage today machines
can produce large quantities of paved surfaces in record time. A drilling
machine, a chip spreader, which lays down the aggregate on top of a bituminous
binder, a compactor, and a cold planer are used. The surface thus made is ready
for traffic.
Vibratory roller compactor is used
to compact soil, gravel, concrete, or asphalt. It ensures a smooth, even
surface and achieves the required density.
Padded Drum Compactor is applied to
compact soil, gravel, concrete, or asphalt.
The Concrete Plants come in two
types being ready mix plants and central mix plants. A concrete plant has parts
and accessories.
A Curb Machine takes concrete and
creates curb and gutter continuously.
A Crusher reduces large rocks into
smaller rocks, gravel, or rock dust. An Impact Crusher may be a horizontal
shaft impactor or a vertical shaft impactor.
A Cone Crusher breaks rock by
squeezing the rock twice at the the top, and again at a lower position also. It
is suitable for crushing a variety of mid-hard and above mid-hard ores and
rocks.
Asphalt distributors are effective
in applying prime or tack coats on a surface in preparation for paving. They
are in two forms truck mounted or trailer models and are vital equipment in any
asphalt surface treatment project. There is an insulated tank with a heating
system, a spray bar and unique control system. It is scientific and
sophisticated equipment which produces a uniform spray.
An Asphalt Mixing Plant combines
mineral aggregates sand and filler in a correct proportion to yield a great
result. The mixture is heated and coated with a binder.
A Paver is used to lay asphalt.
A Road Roller is used to press the
asphalt and come in rubber tyre rollers double drum asphalt rollers. Their use
is determined by the mixture used in the highways.
A Cement Mixer homogeneously
combines cement, aggregate, sand or gravel and water to form concrete. There is
a revolving drum to mix the components.
Road Reclaimers work on the asphalt
layer and mix it with the underlying base to stabilize the deterioration that
has occurred. They add asphalt emulsions and binding agents during
pulverization.
Combination Compactors are put to
use for the compaction of asphalt base and sub-base courses for road
construction and road maintenance.
A pneumatic compactor comes with
advantages and provides a uniform degree of compaction compared to steel wheel
rollers. The result is a tight, dense surface and increased density also.
Thus there are machines for all
stages of highway construction that will ensure speedy time utilization,
meeting of deadlines and efficient results.
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