DIGEST 2006 - Sabita

Figure 2: The Chipsealer 61 unit with 3 500 l binder tank
and behind it the 8.5m 3 stone hopper
The Chipsealer units are fully
imported from Secmair in France.
The South African units boast the
most advanced technology ever
installed on this type of
equipment, and includes three
on-board computers, which control
all aspects of the binder and
aggregate application, as well as
monitoring all the relevant
physical environmental data (such
as road temperature, air
temperature, positioning etc.)
and recording the application on
video.
In the international arena the use
of the single pass system has had
a major impact on the traditional
sealing market, and specifically on
the effectiveness of maintenance
seals, leading to a zero pothole
scenario. It is believed that the
introduction of this equipment into
the South African market will
assist road owners to more
effectively maintain their road
networks and reduce annual
maintenance costs.
In addition the accurate spraying
of the binder (temperature control
of surface seals.
and
application
rate) in
accordance
with
specifications,
(which is
normally
difficult to
achieve in
practical
terms on
site,) should
greatly
improve the
effectiveness
The use of visual imaging
equipment and integrated
computer controls on the new
Secmair equipment offers road
owners an alternative that was not
previously available to them – i.e.
the option of applying a low cost
maintenance seal over just that
portion of road that really needs
treatment.
Emulsion binders
The units are designed to apply all
types of binders, including
modified binders, requiring an
application temperature of up to
170 0 C. International trends show
that the future of these units lies
with the application of emulsion
and modified emulsion binders.
The environmental and safety
aspects associated with emulsions,
together with the ease of
application and the reduction in
energy consumption (LP gas in
particular), makes emulsions a
very attractive option.
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