New Dynapac SD pavers for Dezhou ring road

New Dynapac SD pavers for Dezhou ring road
Dezhou City gets new ring road
CHINESE CONTRACTOR Shandong Lutai Co is using
two of the newly launched Dynapac SD2550CS large
tracked pavers to lay asphalt on a section of the new ring
road being built around Dezhou City, in Shandong Province,
Eastern China.
The SD2550CS pavers are amongst the first to have
rolled off the assembly line at Dynapac’s Chinese manufacturing
plant in Tianjin, which began to assemble this
model soon after it went into production at Dynapac’s
German factory late last year.
Featuring a basic width of 3m, the SD2500CS offers a
maximum paving width of 10 m and a placement thickness
of 320 mm. It offers a theoretical placement capacity of
800 t / hour and a paving speed of up to 28 m/minute.
Two newly delivered Dynapac SD2550CS
asphalt pavers are being used as part of
a new fleet of equipment by contractor
Shandong Lutai in eastern China.
Shandong Lutai is also using two newly-delivered
CC624HF 12-tonne double-drum vibratory rollers, one of
the heaviest machines in the Dynapac roller range, and two
CC900 compact double-drum rollers, which are designed
for small-scale compaction work and close-up finishing.
The CC900 features a drum width of 900 mm and with
its large drum diameter makes compaction easier, even
in soft tricky asphalt mixes. Articulated steering with
maintenance-free hitch and steering cylinder reduces
maintenance.
Shandong Lutai’s equipment manager, Zhang Bau Fu,
says that the Dezhou ring road is the first project for the
new Dynapac equipment, which had arrived on site at the
start of the company’s contract.

New Dynapac SD pavers for Dezhou ring road
Zhang Bau Fu, Equipment
Manager, Shandong Lutai.
“We have used Dynapac
equipment before,
but it was always on
a rental basis,” he
says. “There is a large
amount of infrastructural
work underway and
planned in Shandong,
and so we decided to
invest in the equipment
as a strategic expansion
of our own fleet.”
Dezhou is a fast-growing city that bases much of its
economy on the development and manufacture of cleanenergy
technology and products. One of its main activities
is the development of solar energy equipment, and
Dezhou raised its international profile in this sector when
it hosted the International Solar City Congress in 2010.
Mr Zhang says that the ring road has been split into
several different packages, and that Shandong Lutai is
responsible for the asphalt laying on a 10 km stretch, with
two carriageways, each of 14.75 m width.
The asphalt layer consists of two courses, a base
course that is 8 cm thick, and a wearing course of 6 cm.
“Working the pavers side by side, and
following up directly with the compactors
allows us to maintain a tight site and
proceed at a uniform pace.”
Both SD2550CS pavers are being used side-by-side on
the carriageway, each working at a width of about 7 m - so
that between them with one sweep they cover the entire
width up to the concrete barriers on either side of the road.
“We have a tight deadline of just two months to complete
this project,” says Mr Zhang. “Working the pavers side by
side, and following up directly with the compactors allows
us to maintain a tight site and proceed at a uniform pace.
“There is also the fact that this time of year sees a great
deal of rain, and if we work to a pattern like this, where a
section of the road is totally completed at one shift, then
we are helping our logistics and planning even if our work
cycle is broken because of a downpour.”
Mr Zhang says that with the machines having only just
begun on site, it is not yet possible to provide an accurate
figure on progress but that 1000 m per machine per day
would be a realistic average for this time of the year.
He says that the base course requires two passes of the
CC624HF compactors, followed by a further two passes
on the wearing course, with the same number of passes
by two small CC900 compactors, with one working on
either side of the carriageway and compacting hard up
against the concrete kerb.