C-Probe Systems

Jubilee Bridge was constructed in 1977 - chloride contamination was causing corrosion of the suspended and cantilever reinforced concrete support beams, half-joint elements and the soffits of the beamsICCP was used to protect cantilever beams, half-joints and suspended slab elements. Over 8,500 anodes were drilled in and are controlled in 20 zones with separate control of the beams and the half-joints.

Challenge: Many elements of the iconic skyscraper were facing embedded steel corrosion, including the structural steel lattice columns within the colossal terracotta enclosures. The expansion of the steel caused by the corrosion was severely damaging the masonry cladding and cracking the six-foot-tall terracotta bison heads.Strategy: Installation of an impressed current cathodic protection (ICCP) system at the steel sections with the colonnades on 29th to 32nd floors. The system consisted of LoCem® +point® anode mortar was applied within the bed joints and drilled in to provide 360° protection of the steel surfaces. The bison heads were deconstructed, steel cleaned-up and masonry reconstructed. LoCem® is a low carbon cement alternative (AACM), which can also act as a cathodic protection anode for controlling steel frame corrosion.Outcome: The ICCP system resulted in long-term performance and control for the whole life preservation of our clients’ assets. Using AchillesICP for control over corrosion rate, and AiMS to collect the data, the client had full transparency over structural health and the power to make predictive maintenance decisions.

37 Fleet Street (Hoare’s Bank) was built in 1829 as the headquarters of C. Hoare & Co who remain the only family owned bank still in existence. Corrosion had effected the building significantly and the façade was cracking due to iron cramps and pins corroding.C-Probe Systems provided the low carbon, smart materials to create an ICCP system which effectively protected the structure and controlled the corrosion. Winner of the ICRI 2007 Award of Excellence.  

Bok Tower is a transitional steel frame construction built between 1927 and 1929 and houses a 60-bell carillon (set oftuned bells). The tower is 205 feet tall, has eleven floors with the belltowerfrom levels 8 through 11. The Gothic revival architecture has three forms of masonry that adorn the exterior: coquina brick, intricate marble detailing and sculptures clad the steel columns and decorative tile panels. It was facing structural corrosion which C-Probe Systems effectively managed using an ICCP system.

Challenge: Concourse Village Plaza houses apartment blocks, retail shops, a multiplex cinema and underground parking. Chloride ingress and weathering has taken its toll on the structure with cracking and spalling of the concrete cover from reinforcement corrosion.Strategy: Significant concrete repair in conjunction with an ICCP system was needed for the structure. LoCem® +chase®, will be used specifically for reinforced concrete structures, where the ICCP anode mortar operates within slots cut and holes drilled strategically into the reinforced concrete structural elements. LoCem® is a low carbon cement alternative that can also act as a cathodic protection anode.Outcome: With the design of the ICCP for the Central podium completed, construction will begin in 2023 before moving to the West and East podiums. The project and is expected to go on for the next 2.5 years. The result of the project will be an ESG compliant strategy that will create a more resilient structure, utilising low carbon build materials that can control the impact of corrosion.

Challenge: The structure was had severe structural degradation due to the ingress of moisture and water over its near 100-year life. Corrosion to the steelframe resulted in tensile forces cracking and moving the brick skin, also causing a cracked façade. Strategy: ICCP was used as a method to control corrosion whilst the cracking and movement were repaired. This involved LoCem® and +point® AACM anode mortar to be grouted in the bed joints, alongside embedded corrosion rate sensors for service life tracking (AchillesICP and AiMS). LoCem® is a low carbon cement alternative, that can also act as a cathodic protection anode. Outcome: The structure was restored to be used as high-value residential apartments, saving tonnes of embodied carbon and eliminated the option of demolition. The embedded system successfully controlled and monitored corrosion for the long term, adding an additional 100 years to the structure’s service life.

Challenge: C-Probe's LoCem® +chase® anode mortar has been installed at the Omni Shopping Centre Car Park in Edinburgh, Scotland to 4 levels of underground car parking as part of a comprehensive corrosion management strategy. Overtime the popular car park had succumbed to structural damage and corrosion caused by the ingress of chlorides from de-icing salts from above.Solution: This system comprised of 42 ICCP zones and 7 additional monitoring zones forlevels protected using surface-applied corrosion inhibitors. In addition to this, some 6000 C-Puck galvanic anodes were used to protect newly repaired areas to 2 levels. All the anodes and monitoring could be controlled and data accessed remotely throughoutthe car park with AchillesICP and AchillesIES, helping to extend its service life for 100+ years.Outcome: This ESG compliant approach meant there was no need for demolition or extensive reconstruction using new materials, helping to reduce waste and harmful emissions. Reconstruction was also a near-impossible strategy due to underground facility and electric tram on land, meaning something non-invasive like cathodic protection was essentialto minimise social disruption.