ENVISIA®

333 George Street •• Sydney

CLIENT/CONSTRUCTION TEAM

LocationCorner George Street and Martin Place, Sydney
ClientWatpac
OwnerCharter Hall
ArchitectGrimshaw Architects

Date

The building was completed in 2016

Boral Products/Services

The majority of ENVISIA® concrete was used in the floors of the building. The floors at each level were constructed using post-tensioning, which requires the concrete to gain strength rapidly. ENVISIA® easily achieved the 22 MPa strength required after four days, compared to the five or six days that would be expected from concrete with this high level of cement replacement. ENVISIA® enabled construction to continue at the rapid pace required in modern projects, while reducing the level of embodied carbon in the building. The balance of the volume was used in columns and core walls.

Concrete placement was performed by Boral subsidiary
De Martin & Gasparini.

Sustainability is at the heart of 333 George Street, an 18-storey building featuring a mix of retail and office tenants. Central to achieving the goal of achieving a 5 Star Green Star energy rating is the selection of Boral's innovative ENVISIA® concrete for the building's suspended post-tensioned floor plates, columns and core walls.

333 George Street is the first commercial project to use ENVISIA® in super structure elements, chosen for its reduced carbon and high early strength qualities. Typical cement replacement levels in post-tensioned concrete are 20 per cent, however ENVISIA® achieved a minimum of 60 per cent cement replacement. This was estimated to have saved about 700 tonnes of CO2 emissions.