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REVEX first at Heathrow
Heathrow Airport’s taxiway concrete
is generally accepted to be among the hardest in Europe. With
its flint and river gravel mix and aggregate up to 65mm, the
age-hardened concrete represents a challenge to any diamond saw
bladeboth in terms of cutting rate and life.
In support of Amec, as part of BAA’s
Pavement & Infrastructure Team, Concrete
Cutters (Sarum) Ltd. recently cut 1350
linear metres of Taxiway Alpha’s PQ concrete to 450mm
depth. Using 72h.p., 4 cylinder diesel floor saws Concrete
Cutters carried out comprehensive tests using diamond blades
from four different suppliers including Nimbus. Comments the
company’s operations director Iain Campbell, “the
new REVEX blades clearly became first choice since life
averaged at least 15% more thantheotherblades. They also tended
to cut faster or at least
equal to the best of the rest.”
Concrete Cutters used four saws cutting simultaneously, with
two 5,000-gallon water tankers each feeding two saws.
Step-cutting commenced with two saws
performing the initial cut using 600mm diameter blades,
followed by a third machine tooled with a 750mm blade. The
final cut was taken with a fourth machine using a 900mm /1200mm
diameter
blade. As Iain Campbell sums up, “We
started a week ahead of break-out, worked 7a.m. to 6.30p.m.
daily shifts and stayed on programme throughout the
job”
Increasing speed on the M3
In recent trials a new version of the
Nimbus ULTIMAX thin wall diamond crown drill has shown itself
nearly 70% faster than some other drills.The trials took place
during the Highways Agency’s scheme on the M3’s
Lightwater interchange bridge at Junction 3 where structural
upgrading has taken place in line with the current European
standard.
To facilitate barrier/parapet replacement
Farnborough based contractor Castle & Pryor has drilled
close on a thousand holes using a combination of rock and
diamond drilling. This latest ULTIMAX
version has been developed using new diamond grit/bond
technology to provide faster drilling especially where steel is
involved. In the event the M3 project
demonstrated, on a trial basis, that the
new Nimbus product can significantly
reduce drilling time and ease the problem
of penetrating steel. As Nimbus area sales
manager Danny Palmer observes,
“Using the 20mm diameter ULTIMAX
trial drill Castle & Pryor achieved
penetration rates of up to 9cm/min through
the heavily reinforced flint concrete involved.” In
general rebars needed to be avoided where possible for reasons
of structural integrity but on hitting steel the drilling
contractors reported that
they found no need to ease back on
drilling pressure.
In addition to performance enhancement the
new ULTIMAX reflects the safety culture for which its parent
organization Saint- Gobain Abrasives is now well known. All
Saint- Gobain plants are oSa certificated which means that 100%
of its production complies 100% with the international
standards laid down.
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Diamatic joins the Nimbus range
May this year saw the beginning of an
important new alliance for Nimbus Diamond Products. As sole UK
distributors for the Dutch floor preparation system Diamatic,
Nimbus will be able to offer a full range of machines to cover
floor grinding and polishing requirements across the board.
As Nimbus national sales manager Peter
Worsley explains, “With the versatility of the Diamatic
range behind us we will provide a cost-effective answer for
every application from a simple ‘ironing out of
bumps’ to a multi-stage, top quality decorative
floor.” The company behind the patented Diamatic
technology,
Holland Industriele Diamantwerken, is a
leading name in floor preparation systems and specialises in
the design, development and manufacture of state-of-the-art
planetary-driven machines. As sole UK agent Nimbus becomes part
of
Diamatic’s worldwide distribution
network.
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