Duoguard Australia

Client – Jones Lang LaSalle
Location – 595 Collins Street, Melbourne, Victoria
Consultants – Infracorr Consulting
Contractors – Vertitech Australia Pty Ltd
Date: January – May 2017

Asset Description

595 Collins Street comprises a 20 storey A Grade commercial tower, located in the CBD of Melbourne Victoria. The building includes two (2) levels of basement parking, ground floor retail plus 17levels of high-quality office space. The Victorian Registry of Births Deaths and Marriages is located on the Ground 595 Collins St Melbourne.

Maintenance to infrastructure and a proactive approach is always a desirable attitude. Localised deterioration was observed along the insitu concrete joints, a condition assessment was requested and performed, the assessment detected reinforcement corrosion.



Infracorr Consulting was contracted to perform a condition assessment on the external facade elements, the assessment detected reinforcement corrosion and the initiation of spalling concrete along the false joints.

The recommendation and remedial design selected the Patchguard Connect Galvanic anode corrosion control system, as it provided a low-disruption option for preventative maintenance along these joints. Unlike other galvanic anodes which require breakouts, the Patchguard connect system could be installed in discrete core holes, minimising the work required to protect the structure.

Challenges included the external access system required to install the system, and access during busy periods in the city itself. Drilling holes and noise levels were to be kept to a minimum.

Specialist Remediation contractors Vertitech was chosen because of their experience and highly trained technicians to install the system.

The Benefits

Reinforced Concrete is a very durable and versatile construction material, however if poorly constructed or unprotected, can over time, deteriorate through reinforcement corrosion, leading to costly maintenance problems if left untreated.

Patchguard Galvanic anodes were installed into contaminated areas of reinforced concrete, identified as being at risk of corrosion. The system is discrete with no surface wiring or permanent control systems, the Patchguard is used to prevent incipient anode induced corrosion adjacent to reinforced concrete patch repairs.