Concrete Remediation Solutions

Controlled demolition removes unsound, delaminated, contaminated or structurally defective concrete while protecting the retained structure, reinforcement and adjacent services. Methods span electric, pneumatic and hydraulic breakers, robotic demolition, concrete saws and high or ultra-high-pressure hydrodemolition, selected to suit deterioration depth, reinforcement configuration, structural sensitivity and permissible vibration, noise, dust and water discharge.

Typical applications: bridges and bridge decks, wharves and marine structures, process plants, tanks and water-retaining structures, cooling towers, tunnels and culverts, foundations and mining infrastructure.

Crack injection restores structural continuity, seals cracks against water and contaminant ingress and consolidates fractured or voided concrete. Low-viscosity epoxy resins are used for dormant structural cracks requiring high bond strength; flexible polyurethane, hydrophilic polyurethane or acrylic resins are selected where cracks are wet, actively leaking or subject to movement. Injection pressures are controlled to suit the concrete condition, crack geometry and structural configuration.

Typical applications: bridges and structural beams, columns and walls, tanks, tunnels and culverts, marine infrastructure, foundations, industrial floors and precast elements.

Waterstop injection controls active or recurring water ingress through joints, cracks, penetrations and discontinuities by intercepting the leakage path and forming a flexible barrier within or behind the structure. Water-reactive materials are selected to suit water flow, joint movement, void condition and required flexibility, with injection sequencing planned to control active water and establish continuity along the treated joint.

Typical applications: basements and below-ground structures, tanks and reservoirs, tunnels and shafts, dams and spillways, marine structures, service penetrations and water-treatment infrastructure.

Dry-mix gunite pneumatically conveys pre-blended dry material to the nozzle, where water is introduced and controlled by the operator immediately before high-velocity placement. The method suits localised structural repairs, overhead and vertical reinstatement, thin-layer repairs and complex profiles without conventional formwork. Delivery includes preconstruction trials, substrate and reinforcement preparation, layered application, rebound control, finishing and curing.

Typical applications: tunnels, bridge beams and substructures, wharves and marine structures, tanks and reservoirs, retaining walls, cooling towers and mining infrastructure.

Wet-mix shotcrete is batched, pumped and pneumatically projected at high velocity, providing rapid placement, effective compaction and high production rates on vertical, overhead and irregular surfaces. It is delivered for structural reinstatement, section enlargement, strengthening, large-area rehabilitation and ground support, with mix designs incorporating supplementary cementitious materials, fibres, accelerators and durability admixtures. Robotic application improves safety and consistency in tunnels, confined spaces and extensive remediation zones.

Typical applications: tunnels and shafts, retaining walls and slopes, bridge substructures, wharves and marine assets, tanks and reservoirs, industrial process structures and mining infrastructure.

Pressure and contact grouting fill voids, restore contact, consolidate fractured materials and improve load transfer between concrete, steelwork, rock, masonry and structural interfaces. Cementitious, microfine, non-shrink, epoxy, polyurethane, acrylic and specialist chemical grout systems are selected to suit void geometry, required strength, water conditions and allowable pressure, with real-time pressure, flow and volume recording throughout.

Typical applications: tunnel linings, baseplates and structural bearings, machine foundations, bridge bearings, dams and spillways, wharves, ducts and inaccessible structural voids.