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We offer a range of
services to meet your needs


Water Stopping and Water Proofing

Specialised Grouting for Void and Annulus Filling

Permeation Grouting

Structural relining of Tunnels and Culverts

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
• Incorrect material application

Product selection is key, and this is where Ironstone Civils’, and our supply partner’s experience comes to the fore. 

Nothing however is more important than having experienced applicators who understand the importance of working to strict quality procedures

Concrete Repair

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 * 1 thus  hydraulic capacity loss is minimised compared with some other solutions.

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

Structural relining of Tunnels and Culverts

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.

Water Stopping and Water Proofing

Voiding under structures is often caused by settlement or washing away of foundation soils. This voiding can  compromise the structural integrity of the structure, particularly if the structure was designed to rely on the soil for structural support. Ironstone Civil have experience of filling voids under buildings, warehouse slabs, behind retaining walls and under storage tanks.

Another application is the abandonment of infrastructure, i.e., where removal of the asset is uneconomical, but  the asset owner wants to ensure that the asset will be  permanently filled and remain inert far into the future. The sorts of assets abandoned are water, gas, oil and sewerage pipes, or tunnels and culverts.

A specialised application is the filling of the annulus created when a new pipe is inserted into a redundant host pipe. 

There are many types of grouts available depending on the application. Sometimes a rapid set time is required or high flowability or a higher strength product. 

Ironstone Civils’ team have carried numerous void fill and abandonments in the mining, water, road and rail infrastructure sectors, throughout Australia

Specialised Grouting for Void and Annulus Filling

Permeation grouting can be an effective technique to strengthen sandy soils by filling the void spaces between the sand grains and aggregating the sand.

Essentially a highly flowable grout comprised of fine cement and water is injected under low pressure into the soil. The flowable grout fills voids and as it sets it forms an aggregated block of soil. 

The block that is created can be used to support buildings and structures or to enable temporary excavations adjacent to these structures.

For any substantial works carrying out an engineered design is essential.

There are several cement types that can be used varying from standard cements to ultra fine ground cements.  Matching the cement to the soil type is an important consideration.

Successful permeation grouting relies heavily on the experience and expertise of the permeation technicians and correct material selection. 

Permeation Grouting

Ironstone Civils’ team have carried out many specialist surface coating projects including the application of:

• High abrasion or chemical resistant surface coatings.
• Trafficable waterproof membranes on bridge decks and slabs.
• Highly durable pedestrian and bike path coatings.

Other Surface Treatments and Coatings

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