Mix Mud realises the fact that most minor concrete repairs in Sydney are carried out quickly and simply by hand. The safety of the work is a major factor that should be considered during the work.
Paul Albanese, Managing Director at Mix Mud believes that: A finishing touch can be the difference between ‘nice-looking’ and “outstanding”.
To achieve a high standard and deliver lasting results, Mix Mud advises the following simple seven-step process set out below.
– Step 1: Substrate Preparation
– One should mark the defective concrete and then remove it according to the size of the affected area.
– A hammer and chisel will probably be sufficient for small patch repairs.
– For slightly larger areas, a hammer drill can be used and for even larger areas a high-pressure water jet can be used.
– Then the concrete must be removed to a minimum of 155mm behind the main bars. Cut the side to a minimum of 90° to avoid any undercutting and maximum of 135° to reduce debonding around the edges.
– The substrate should be of good quality with no loose material before continuing any further.
– Inform the supervisor immediately if there are any cracks in the substrate.
– Step 2: Reinforcement Preparation
Remove all the tie wires, mortar/concrete, rust and any other loose material. You can remove it by the following techniques:
– Steel wire brush or power tools – This technique can be applied only in carbonated concrete and under environmental constraints.
– Abrasive blast cleaning – In case chlorides are present, then reinforcement should be cleaned with water afterwards.
– Step 3: Reinforcement Corrosion Protection
– Apply two layers each 1mm thick.
– Allow the first coat to harden before applying the second coat.
– Allow application to dry before applying repair mortar.
– Apply corrosion protection using a hopper spray for large applications or using brushes to smaller applications.
– At this instance, using two brushes can ensure full application behind the bars.
– Step 4: Bonding Primer If Needed
– The substrate should be wet before you wipe away excess water.
– Wipe it using a sponge for small areas of air pressure for larger areas.
– Use either a brush or hopper gun to apply the primer.
– Be sure that the gun points at different angles on the surface to ensure even application behind the bars.
– Step 5: Repair Application
– If bonding primer has not been applied, then wet the substrate.
– If it is being repaired by hand, then press the repair mortar firmly into the repair area using a trowel and/or hand.
– When the first layer is dry apply the second if the application depth exceeds the product’s maximum layer thickness.
– Finish with a wooden trowel for best results. Avoiding spraying additional water over the surface.
Repairing concrete is not as easy as people think. The most common process out there is to look at a crack in a concrete path or drive and try to force some kind of cement-based concrete into the existing crack. It does not work every time or most of the times.
About Mix Mud:
Mix-Mud offers the best rendering facilities in Sydney. It also excels in providing concrete repairs in Sydney and is among the best companies that offer cement and acrylic render in Sydney, Australia.
For More Information :- http://mix-mud.com.au/cement-rendering-services-sydney.html
