What Are Asphalt Driveways
warmer parts of the world concrete is often used since there is not much
risk of damage from frost heaving, use of Salt and de-icing chemical
that damage concrete for snow and ice removal. An asphalt driveway is a
flexible paved surface. In comparison to
asphalt will bend and flex over time. As we
build a driveway
consideration is given to the proper base material, grading and joint
construction. Both are good materials for a driveway construction, but
we feel that asphalt driveways provide better flexibility and value for
property owners both residential and commercial. With correct
construction an asphalt driveway is also flexible, quite durable, and
less prone to failure cracks. What is an Asphalt
Asphaltic concrete is mixture of well graded
crushed stones bonded together with asphaltic cement, the petroleum
product that glue the aggregates together. If you have read the article
on concrete driveway you will know that there are prerequisite tasks
that precedes road paving, they are equally applicable in this case.
The composition of an asphalt driveway is made up of bituminous
asphalt mixed with specific stone sizes and sand. Driveway asphalt is a
specifically engineered mix design for a pavement project determines
along with handling and compaction the final asphalts characteristics.
So it is a specific mixture of various sized aggregate, and it contains
stones, sand and liquid asphalt cement in specific ration’s that is
heated to enable it to be mixed. This cement is a petroleum product
which is heated to the point at which it becomes a liquid. This liquid
cement and aggregate mixture is kept heated till it is placed and
compacted. If it cools too much prior to adequate compaction it will not
compact since the heat is what makes it fluid to enable compaction and a
smooth uniform finish.
Really none of this is all that hard it
just needs to be done right and with knowledge of the job requirements
to produce a good end product. Very soon after paving, the mixture cools
and hardens to create a monolithic driving surface that will last over
time. If someone contacts you and says they have left over asphalt from
a nearby job you should be concerned if for no other reason is it still
hot enough.The value in Asphalt driveways
Asphalt driveways are one of the most cost-effective option you can
choose for a driveway. You do not need to worry about salting and
calcium chloride on your driveway in winter since asphalt is unaffected
by salt. If repairs are needed or an underground line needs to be
installed in an asphalt driveway it is less expensive fix than with a
concrete drivewayBeneath the Asphalt Driveway
The ground that receives the bituminous binder course and asphaltic
pavement must be adequately prepared in composition and level ahead of
pouring application i.e. all route survey related tasks are concluded,
and the sub-grade, sub-base and base are in place and well compacted in
right sequence and properly shaped to direct water away from the
driveway. Unlike concrete, Asphalt is particularly weak in the face of
Beneath your asphalt driveway is your base, a
layer of imported, suitable and well compacted material. This is to
provide solid foundation for your asphaltic pavement. This material
could be naturally occurring laterite or well graded crushed stones etc.
You may find out what is commonly used in your locality.
name suggests, the sub-base is beneath the base, it may be composed of
same type of material with the base or a variation of it. A thickness of
150mm is generally suitable for each of the base and sub-base.
Subgrade sit underneath the subbase and is the graded natural ground
prepared to receive the subbase, it must be sound and well compacted.
Where the grade is too weak, you must stabilize it otherwise the road
may fail. If the subgrade is confirmed to be stable enough, you may be
able to compromise on the installation of base and subbase, but you must
be very sure.Asphaltic Paving Equipment
Effective application of asphaltic pavement require the use of
equipment, the asphalt is usually ordered and delivered to site at high
temperature while the bituminous material has not solidified. It’s in
this state that the asphalt is spread, and compacted. To pave an
extensive portion of road without adequate equipment is therefore
practically impossible. This is why you need equipment.
concern is primarily your driveway, I don’t consider your investment in
equipment necessary, except you can find a way to dispose them off after
use, at reasonable price. In the alternative, you may hire equipment if
such opportunity exist within your locality.
You will require a
motorized equipment (tar boiler) to spray the hot liquid bituminous
binder course on the prepared base.
You will also need a tipping
truck to deliver the asphalt and a paver to receive the asphalt from the
tipping truck and accurately deposit the asphaltic materials on the
prepared base at the prescribed thickness, and a roller to compact the
freshly laid asphaltic concrete. You will require a water tanker as well
to spray water over the newly paved driveway surface.