Flinders Street Railway Station
Client: Public Transport Commission
Engineer: Hardcastle & Richards
Contractor: Koroz Construction
Concrete Supplier: Pioneer Concrete
Shrinkage Reducing Admixture, Grace
Location: Melbourne, Australia
The Challenge . . .
Repairing the roof of this famous building required the removal and replacement
of the bitumen/felt roof membrane over the existing concrete roof. The
specification called for a 50mm thick lightweight fiber reinforced concrete
overlay slab to be placed over the membrane. The challenge was to produce
a slab overlay with minimal cracks.
The Solution . . .
Following discussions with the project managers and design consultant,
it was agreed to use Eclipse® Shrinkage Reducing Admixture on a section
of the project. Eclipse dramatically reduces shrinkage and associated
cracks in concrete without adding expansive materials to the concrete.
It is the first product of its kind and it acts chemically to attack the
primary mechanism causing shrinkage in concrete.
The placement and finishing operations went smoothly and there has been
no evidence of cracking or curling on the slab overlay. Grace MicroFiber
were specified to produce a slab overlay with minimal cracks.