international
construction
november 2014
ROADBUILDING
32
Project pressures
rehabilitation and reconstruction of a
section of National Route 4 (N4) over
25 km fromnear Zeerust toEnzelberg.
“Herewe’re reclaiming the existing 300
mm sub-base, adding a 150mmG1 base
course layerand sealing the road,” saidMr
Nyoni. “An extensionof timewas granted
due to badmaterials encountered, which
could not be recycled in-situ. Suitable
material had to be sourced from borrow
pits and was placed on top of the in-situ and stabilised using
theRM300.”
Propelled by its all-wheel drive configuration, the Cat
RM300 is designed to work in both full-depth reclamation
and soil stabilisation applications. It achieves precise cement
stabilisation, as well as very accurate predetermination of the
specified moisture content required through computerised
settings for the on-board, water-spray pump system.
“For road construction, we’ve found that the Cat RM300
ensures a consistency of the mixed material that’s perfect for
layer works, achieving precise densities,” saidMr Nyoni. “The
speed and efficiency are truly outstanding, providing us with a
major competitive advantage.”
Indeed, Nyoni is comfortably stabilising between 800 to
1,000m³ per day.
The machines feature a 2.4 m wide rotor drum fitted with
200 carbide-tipped picks, and offers a maximum cut depth of
508mm.
“With the RM300 you canmill the sub-base and the selected
material as one continuous layer, which significantly speeds up
the construction programme,” saidMrNyoni.
Controlled concrete
Meanwhile in the concrete paving sector, machine control
technologies from pioneers in the field such as GOMACO
and Leica can deliver other benefits to rehabilitation projects
by speeding up work compared to traditional methods and
minimising disruption for road users.
Darr Link is key road connecting Interstate 80withHighway
30nearCozad,Nebraska,US. Itwas scheduled to receive a new
>
Ammann Australia celebrated the
official opening of the training centre
in Queensland on 27May 2014.
