Concrete Crack Repair and Cement Injection

Why does concrete crack?

Cracking concrete can be a common problem. However, not all cracks in concrete means that it is concrete cancer. If left untreated, and depending on the type/area of the concrete cracking, it can lead to concrete cancer.

Cracking concrete occurs for a number of reasons. It could be due to:

  • If new concrete has recently been poured, then the rate and amount of drying taken could impact the likelihood of cracking concrete
  • Exposure to the elements while drying
  • Level of tension placed on or within the concrete
  • The concretes level of elasticity

While the majority of cracking concrete does not affect the structural integrity of a building, left untreated, it can not only be unsightly but can lead to extensive and damage to structural integrity.

Cracking concrete, unlike concrete cancer, will often be more superficial looking in regards to the level of damage. Some of the main differential points are:

  • Concrete cancer is often caused by poor waterproofing. This is where water ingress has occurred and resulted in the reinforcing steel within the concrete structure begins to rust and corrode. Cracking concrete can be more of a result of the hardening process.
  • Concrete cancer, when at a very late progressive stage, often has visible chunks of concrete missing, heavy corrosion, concrete falling off or obvious signs of water ingress. Cracking concrete, depending on the level of damage, often has various cracks but no corrosion has occurred yet.


Did you know that currently concrete repairs are unregulated in WA? How do you know who to trust? Read more...

Types of cracking concrete

Cracks in the concrete as clearly visible, there are types of cracks that require specific techniques for repairs.

Expansion Cracks

With variable temperatures concrete can often expand and contract due to warming and cooling.

Structural Cracks

This is caused from movement of the concrete structure.

Water Ingress

While this is a predominant cause of concrete cancer, water can travel through the initial cracks in the concrete.

Shrinkage Cracks

This can be caused by stress to the concrete in specific corners of the structure and depending on the scope of work, could be treated with expansion joint sealing or reinforcing steel.

Weight-Related Cracks

This refers to the weight that concrete structure is holding. The level of pressure could cause cracks in the concrete.

Poor Design & Construction

Some of the most common causes of cracking concrete are poor initial construction, design defects, exposure to the elements and the quality of the materials.

cracked concrete 400x400


The type of repairs completed by the BUSS team will depend on the cause of the concrete cancer. If the concrete cancer is caused from chloride contamination, then the repair process can become more complex and will more than likely involve highly specialised concrete repair solutions such as cathodic protection.

When repairing cracking concrete, BUSS uses various techniques depending on the scope of damage. A common technique required in crack sealing and injection.

Crack Sealing and Injection is the process of repairing concrete damage, by applying a sealant directly into the damaged, cracked concrete. Damaged concretes and cracks can vary in size, starting from small hairline cracks through to large scale structural repairs. Crack Sealing and Injection also includes repairing internal holes, spalls and cracks through to external damages where heavy traffic flow is expected. Once cracks are sealed, the now repaired crack will be two to three times stronger than the original concrete, which ensures a long lasting and durable crack repair solution.

Concrete structures are continually exposed to natural and manmade elements which, over time cause the deterioration of a concrete structure. No matter the situation, BUSS can provide a solution to maintain and rehabilitate any structure and environment, based on the assets operational and budget requirements. Call us on 08 9444 1732 for more information.

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