Pumps Under Pressure on
Montreal Mega Hospital
Upon completion in 2016, the 21 story main building of
the massive, Montreal University Health Centre will pro-
vide more than 349,000 m² (1,145,000 square feet) of
floor space and deliver 772 individual, single-bed rooms
to serve approximately 345,000 outpatients, 22,000 inpa-
tients and 65,000 emergency patients each year.
The project is one of North America’s largest concrete
jobs with a footprint of 30,500 m² (100,000 square feet).
Multiple pieces of Putzmeister equipment, including two
trailer pumps, four placing booms and four towers, are
being used to place the nearly 100,500 m³ (110,000 yd³)
of concrete required for the project.
In order to complete the colossal project, two leading
contracting firms, Laing O’Rourke and Obrascon Huarte
Lain, joined together to form Construction Santé Montréal
They hired Coffrage Alliance as the formwork contrac-
tor for the job, who turned to Laval-based TPG Concrete
Pumping (TPG) to determine a plan for placing the im-
mense amount of concrete required for the hospital.
With a footprint totalling approximately 30,480 m²
(100,000 square feet), it was essential to figure out a
concrete placing system that could reach all parts of the
project with minimal setup and tear-down.
TPG suggested a set-up consisting of two Putzmeister
trailer-mounted pumps to pump through RS 750 pin tow-
ers to four Putzmeister MX 36-4 Placing Booms.
With a horizontal reach of more than 35 m (115 feet)
each, the placing booms were able to cover nearly the
entire project footprint.
To pump to the maximum height of more than 91 m
(300 feet), the team selected two Putzmeister BSA 2107
HP E Trailer-Mounted Concrete Pumps to connect to
the placing booms, which offer a maximum pressure of
220 bar (3190 psi).
Also helping to progress the project vertically was
the Z design of the Putzmeister placing booms. With four
tower cranes present at different levels on the project,
the flexible boom design allowed the crew to work at a
level that wouldn’t interfere with the functioning
of the tower cranes.
Harsh Mix, Long Pours
The harsh concrete mix used, along with some
of the pours taking place over a long period of
time—up to 16 hours—also posed challenges on
the job site.
The project called for the use of an anti-
corrosive, C80 (80 mpa) cement, which is 10
times stronger than the typical hospital seismic
resistant strength required. While the harsh mix
is harder on the pumps, the Putzmeister equip-
ment was up to the challenge.
Contractors World International Vol 6 No 4
Contractors World International