In this week’s blog, we examine one of the lesser known concreting techniques that we offer; shotcreteing. This is a process where thin layers of wet or dry mix concrete are sprayed onto a surface using a hose. Below are some of the most commonly asked questions we get from clients when we recommend shotcrete as a concrete application technique.
How does it differ from concrete?
Shotcrete is concrete, what differs is the way that cheap viagra online it is applied. When used for construction purposes, concrete tends to be poured from a mixing truck and then needs to be compacted through a process of vibration. The result is a very thick surface which tends to be used as foundations in buildings. By contrast, the shotcrete technique involves pushing wet or dry concrete out through a high pressure nozzle by using compressed air.
What are the advantages?
Because it is not as labour intensive as concrete and does not use up as much raw material, shotcrete is comparatively cost effective and quick to apply. The thinner layers of concrete which the shotcrete technique creates, along with the face that it stays in place once sprayed, means it can be used on vertical surfaces as well as awkward or unique shapes. It’s ability to bond and low permeability also means that it can be used to repair cracks in established concrete structures.
What are the disadvantages?
Although shotcreteing is less labour intensive, more emphasis is placed on the application technique as it needs to be applied at the correct distance and at the right water to cemetious materials ratio. Shotcrete which is applied by an amateur might look okay on the outside but be riddled with sand pockets and voids underneath. Imperceptible faults like these leave the reinforcing steel the shotcrete encases vulnerable to the elements.
What is it used for?
The shotcrete technique is most commonly used as an encasing material for irregularly shaped structures like swimming pools or curved structures like grain silos and civil engineering structures like dams, tunnels and tanks. It can also be used as a fireproofing method for structural steel and an earth retention method in areas of high erosion. More recently shotcrete has been adapted for use as wall insulation in building construction.
Icon Concrete is a well established Melbourne concrete company offering an extensive range of specialised concreting services including shotcreting. Give us a call on 0402 082 472 to learn more.