Expando Articles

Energex - Removal Of A Concrete Slab

John Rothwell Director of No Blast Pty Ltd - Tuesday, August 05, 2014

When I was contacted by Adam Philippini, the Construction Coordination Officer for Energex (an Australian energy provider) to remove a concrete plinth from their basement yard, I knew that Expando Explosive Mortar was the perfect solution for the job.

The concrete plinth needing removal was being used as a base for a transformer, the slab itself was approximately 1 metre thick by 3 metres wide and 10 metres long.

Given the location and size of the plinth, removal was not going to be a straight forward demolition job, this is one of the reasons that Expando was an excellent choice.

The slab was between two buildings where there could be no vibrations, minimal dust and no airborne concrete chips, this mean that traditional demolition methods such as  pounding the concrete with an evacuator was not an option.

After researching alternative solutions, Energex decided to use the unique non explosive demolition method that Expando Expansive Mortar provides, it was also chosen due to the cost saving provided over other demolition options.

To carry out the concrete demolition, Energex loaded Expando SCA-2 into holes drilled 38mm wide, approximately 450mm apart and around 850mm deep. 

The chemical started to crack the slab early on the second day after application, the weather was warm which helps with a quicker concrete burst.

To further speed the process and to ensure the reinforcing was cut, Energex decided to run diamond saw cuts along the slab, as you can see however in the images below, these cuts were not necessary as the job was completed entirely by the chemical expansion.

Expando Expansive Mortar ensured a safe and effective means of demolishing the concrete slab, with none of the usual concerns that need to be considered with demolition in a busy area.

Energex have been very happy with the result and will continue to use Expando in future jobs. 

Expansive Mortar, Non Explosive Demolition Agent - Breaking Granite boulders using Expando

John Rothwell Director of No Blast Pty Ltd - Tuesday, June 05, 2012

Expansive Mortar, Non Explosive Demolition Agent from Expando

Pan Civil was engaged to widen the road and remove boulder hazards from the road shoulder in the Moonbi Hills region of NSW.

The rock was granite and extremely hard. Some of the boulders were up to 200 Tons. Neil Champion director of Pan Civil said “It was uneconomical to break these rocks using the hammers on our excavators. So we turned to Expando.  Drilling was done by hand and by machine. The splitting was taking between 24 and 72 hours depending on ambient temperatures”.

The photo’s Neil provided are great examples of what can be done using Expando.

(Click on the images to make them larger)