Concrete Repair

Well designed and properly constructed reinforced concrete structures can have long service lives. But they are not immune to damage because of,  deterioration over time, foundation movement, chemical or environmental damage, and in some rare occasions structural damage (e.g., due to  earthquakes).  The damage is often seen as cracking of the concrete, or corrosion of the reinforcing steel which then causes concrete spalling. Concrete maintenance and early repair of damage are essential to ensure a structure’s long term structural integrity.

Concrete repairs are, in general, straight forward but complications due to  difficult access, heat, cold, moisture, water seepage, can often occur. Also, concrete repair can be a costly so getting it right the first time is  important. Sometimes the repairs are ineffective, or failure and this is usually caused by incorrect material selection and application

Product selection is key, and this is where Ironstone Civil and our supply partners experience is essential. Nothing is more important than having experienced applicators who understand the importance of working to strict quality procedures.

Structural relining of tunnels and culverts

Many of today’s culvert and tunnel infrastructure is in need of maintenance or  replacement.Replacement is often impractical because it can cause unacceptable downtime or is cost prohibitive, so structural relining options are increasing being considered.

Ironstone Civil provides structural relining of tunnels and culverts using  cementitious or chemical grouts. For larger diameter culverts of 1.8m diameter and above we use Geopolymer reinforced grouts that are centrifugally sprayed onto the culvert to create a new  culvert within a culvert. Once the Geopolymer sets the new culvert structurally replaces the old host culvert. The reinforced grout is typically applied at a thickness of around 50mm* thus hydraulic capacity loss is minimised compared with some other solutions.

* Design thickness will depend on many variables and engineering designs are recommended for all structural replacement.

Water stopping and water proofing

Water leakage can cause significant damage to structures and reduce their economic life. In addition, water leakage can damage stock or seriously reduce the utility of a structure.

Where water is expected to be present structures are usually designed and constructed to have watertight integrity, that is, to prevent water egress from containment structures or water ingress into structures.

Despite these precautions during construction, unplanned water ingress and egress can still occur. Changing  environmental conditions, faulty or inadequate design or construction, damage or simply deterioration of the structure over time, can all be contributing factors. In the instance where an asset is ageing, certain materials may have exceeded their lifespans. Stopping water ingress can be very challenging because it is often impossible to know with precision what you are dealing with. This is where know how and experience come together solve water stopping problems.

Ironstone Civil through our supplier partners have a range of solutions available to stop water leaks in large buildings, large infrastructure and tunnels. Whether it be large water ingress or minor leaks Ironstone Civil have the experience to solve the problem.

Concrete crack injection

Joint sealant repairs

HDPE liner repair