Spalling Concrete

Understanding concrete spalling

Concrete cancer is caused when the steel reinforcing within a concrete slab begins to rust. As the steel rusts it expands, displacing the concrete around it, causing it to become brittle and crack thus accelerating the process.

  • Crazing and cracking concrete (concrete spalling)
  • Rust stains which seem to leak out from within the concrete
  • Bubbling (also called Plating) of concrete render
  • Leaks which appear in overhead concrete surfaces

The dangers of concrete spalling

Concrete spalling – especially on the outside of a building – not only looks terrible, but it is potentially dangerous too. Over time, and with increased exposure to the elements, untreated pieces of concrete may fall from your structure. The risk is it falling and damaging property, or even worse, hitting a person walking below.

The causes of concrete cancer

There are a number of reasons your building may have spalling concrete. The more common reasons include:

  • A poorly poured substrate which has allowed moisture to seep into it through cracks and voids
  • Inadequate preparation of the reinforcing steel when the original concrete was poured.
  • The ends of the reinforcing are too close to the surface. In heavy rains, water may seep through causing lime and other chemicals in the steel to oxidise.
  • Incompatible metals being used in close proximity to each other, thus causing a reaction which allows water into the slab
  • Stress fractures from bearing weight or general wear-and-tear allow water to penetrate the concrete and react with the steel

For more information, or to speak with one of our concrete spalling specialists, please contact the Remedial team.

CONTACT US

WE'RE HERE TO HELP

Contact us for more information and to arrange a quote.

CONTACT US

WHAT YOU SAID

LATEST NEWS

Stay up to date on the latest thoughts, trends and news in building repair and maintenance

Learn more about fire safety upgrades and what you need to know to stay compliant
What you need to know about Fire safety upgrades

25 August 2021. By Jeff Anderson

The shifting sands of the Australian Building Code mean that what you may have known about fire safety in buildings a few years ago might be different today. In this piece we dissect fire safety and tell you what you need know.

Flooring for industrial facility management - Remedial Building Services
The importance of scheduled facilities management – Part 2: Industrial and Production Facilities

11 August 2021. By Goran

In the blog last week we covered off things to consider and look out for in buildings, so this week, we thought we would deviate slightly and look at the role of a facilities manager with particular emphasis on flooring maintenance, and the role flooring plays in the industrial sector.

Facilities maintenance and management is vital to long term building health
The importance of scheduled Facilities Management – Part 1 Commercial and Residential

2 August 2021. By Chris Jakovljevic

Make the time – or allocate someone else to – to undertake routine checks and plan for regular maintenance. This allows you to identify issues sooner and in doing so, mitigate ongoing costs, problems and inconveniences which would otherwise affect the building and the occupants of it.