INTERNATIONAL EQUIPMENT NEWS
Mill prepares ground for mobility in Mexico
(Triturados Asfalticos de Torreón (TATSA)
faced the challenge of removing the
complete pavement at a maximum
milling depth of 25cm to 30cm. With the
W 150 CF it was possible to fulfil this
task in one single pass but depending on
the stretch requirement, TATSA was also
performing milling of the layers in two
or three passes. “These roads are old
and have been paved over many times
during several years without any milling
work. In some parts the pavement is
even above the sidewalk,” says Gisela
A Wirtgen W 150 CF compact milling
machine has been deployed in Mexico
to implement a new Bus Rapid Transit
system (BRT).
The project in one of Mexico's most
important economic and industrial centres
includes a new, exclusive hydraulic concrete
BRT lane plus the rehabilitation of two
adjacent asphalt lanes. The project will result
in better, faster mobility with improved
transportation security for city residents.
However, before being able to
build the new lanes, milling contractor
A W 150 CF compact milling machine, equipped with new 1 800mm milling drum
assembly, mills the entire road pavement along the main city corridor in Torreón, Coahuila,
Mexico, for the implementation of a brand-new Bus Rapid Transit (BRT) system.
A Wirtgen W 150 CF compact milling machine.
www.equipmentandhire.co.za
Gutiérrez, production coordinator at
TATSA.
The entire project covers a length of
24.3km and includes the integration of
9.3km central confined lanes in Torreón
and 15km of highway between Torreón and
Matamoros. The tender stipulated a single
milling machine that could work at several
locations in the city within the same day.
Due to this requirement and the large-scale
project in confined spaces the contractor
chose Wirtgen’s 150 CF with a 1800mm
milling drum assembly. With the extended
drum, the most powerful cold milling
machine in the compact class is now even
more versatile and ideal for surface course
rehabilitation on medium to large job
sites. Furthermore, W 150 CF’s optimised
machine transport weight – despite its
tremendous engine power – spoke for
itself. To maximise the cost-effectiveness
of milling operations, cold milling machines
need to be transported quickly from one
site to the next.
To achieve optimum milling results, the
W 150 CF offers the Level Pro levelling
system which continually compares the
actual milling depth with the present
target milling depth. Level Pro can work
with different sensors – cable, hydraulic
cylinder, ultrasonic and slope sensors
or laser and sonic ski sensors as well as
multiplex systems – and can be extended
as required.
3D levelling is also possible with
installed interfaces that are compatible
with 3D systems from common
manufacturers.
In Torreón, Tatsa used the multiplex
system. In this system, three sensors
on each side of the machine scan the
height. The automatic levelling system
factors all three measurements into its
analysis so that the pre-set target milling
depth is met exactly, while ensuring that
any unevenness in the road surface is
not copied.
“The work with Wirtgen’s levelling
system the Level Pro Plus and Multiplex
systems is intuitive and comfortable, the
milling results showed an evenly milled
surface, true to line and level. This is a
crucial factor when it comes to paving
the new surface courses and avoiding
costly correction measures in the form of
asphalt levelling courses,” says Liborio Frias
Estrada, milling jobsite coordinator for the
BRT project in Torreón.
OCTOBER 2019
11