Previous Page  32 / 64 Next Page
Information
Show Menu
Previous Page 32 / 64 Next Page
Page Background

Canada

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

(CSM).

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.

Massive Footprint

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.

Putzmeister

Contractors World International Vol 6 No 4

Contractors World International