Concrete sandblasting is a process designed to texture hardened surfaces like driveways, patios, walls and columns. The equipment used in this process will help remove excess paint, dust, grime and even expose aggregates. Indeed, there are various styles involved in this process, ranging from light cleaning to deep cutting, which can wear through close to 2mm of hardened surfaces. If you’re curious as to how concrete sandblasting works, including equipment tips and critical advantages, then read on.

Choosing your equipment carefully

You must choose your concrete sandblasting equipment carefully, taking into account the specific needs of your task. Firstly, what is your cut depth? If the surface only needs to be removed lightly, then virtually any type of concrete sandblasting tool will work. However, if your goals are a little more invasive or you’re dealing with thicker surfaces, then you’ll need a more powerful device to get the job done adequately.

Making sure you have enough time

The last thing you want is to get halfway through the process and then need to duck off and do something urgently. The amount of time required is predicated on the area of the space in question. However, it’s always best to give yourself at least a few hours, no matter how small the space is.


Breaking down the process

There are several steps you need to follow stringently to execute concrete sandblasting successfully. These are as follows:


Step 1: Remove debris and items in the vicinity

Firstly, you need to remove all the items and debris that will get in the way of your concrete sandblasting. This includes furniture, plants, electronics and other things that will likely be damaged during the process. For items that cannot be relocated (like a built-in BBQ system), cover the item with a thick cloth to prevent any staining or damage. This also includes windows, since small fragments of the surface could be hit nearby windows, causing cracks.


Step 2: Ensure adequate ventilation

Concrete sandblasting is a standard procedure in large warehouses and garages, where ventilation can be poor. Before starting the process, ensure that there is adequate ventilation to prevent respiratory concerns during the process. Open a few windows or a garage door for extra airflow.


Step 3: Make sure you have all the necessary safety equipment

Worker with complete sandblasting equipment

All people engaging in concrete sandblasting processes need to be wearing the required safety equipment at all times. This includes things like goggles and respirators, which will prevent you from inhaling dust particles and possibly damaging your eyes.


Step 4: Close the valves

On your machine (aka the compressor), you must close all the valves and fill the tank with the necessary sediment. This could include soda, steel grit, glass bead, silica or silicon dioxide.


Step 5: Turn it on

After closing the valves and filling the tank, you should turn on your compressor. Make sure it is set to a low-pressure setting, somewhere between 275 MPa to 0.689 MPa. Direct the nozzle towards the ground, while maintaining a safe distance from the ground. Experts recommend that it should be somewhere between 20cm to 40cm away from your body.


Step 6: Start working

Now, you are finally ready to start working. Use short bursts from the nozzle for maximum effectiveness and clean the surface with compressed air once the job is completed.


Advantages of concrete sandblasting

There are many benefits to this process. These are as follows:

  • Cost efficiency
  • Enhanced safety
  • Rapid turnaround
  • Relatively easy to complete
  • Better results compared to other methods

So, do you think concrete blasting is something that your garage needs? Don’t delay and start researching today!


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