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SHOT BLASTING PART 1 – LEARN SOME SHOT

This first part of our Shot Blasting series will discuss whether shot blasting is feasible or sensible for your floor preparation project.  While shot blasting can leave a desired CSP profile and is universally the preferred floor prep method, it is not the only...

SHOT BLASTING PART 2 – LEARN SOME SHOT

The second part our shot blasting series will cover, What is shot blasting, shot blasting technique and some limitations of shot blasting. Shot blasting is a form of floor preparation prior to a wide variety of seamless epoxy floors. It is the preferred method by...
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SHOT BLASTING PART 1 – LEARN SOME SHOT

SHOT BLASTINGThis first part of our Shot Blasting series will discuss whether shot blasting is feasible or sensible for your floor preparation project.  While shot blasting can leave a desired CSP profile and is universally the preferred floor prep method, it is not the only option for floor preparation.  Many physical factors and restrictions determine if shot blasting is a viable method of surface preparation.   The physical accessibility of an area where your epoxy coating or epoxy flooring is going is the first determining factor.  Shot blasting machines are one of the larger machines used in floor prep.   They customarily range from 8″ models up to 48″ models, some more portable than others.  There are walk behind shot blasting machines and ride on shot blast machines.

Factors to Consider:

  • Project Access Points of Entrance
  • Power Supply Source and Location
  • Restricted access of the Surface Area or Project.

Sometimes Shot Blasting is not physically or economically productive or sensible.  If you access point is a basement, possibly confined space, 2nd flooring or above, these limitations can seriously pose a problem.  Without an elevator, lull or some serious ramp building skills, your not going to be able to the shot blast machine in the building.  These machines are sturdy enough and the larger units to have manufacturers lift points, but this is going to take some planning and coordination.

Next, power supply, most of the heavier duty floor preparation machines run on either 208/220, 440/480 or Propane.  For INTERIOR WORK in the North East US, propane has almost been informally outlawed in the vast majority of commercial, pharmaceutical and industrial projects. While there are some exceptions, that leaves good ol’ electric

.  These machines require or a “pigtail” that must be hard wired directly in a service by a licensed electrician, this is high voltages stuff, not for the DYI crowd.  These service boards must have be located in relative proximity to the area where the flooring preparation is going to take place.   If the power source is in excess of about 350 feet depending on the machine/power source and you will see a significant decrease in production and or mechanical performance failure.  Portable generators (20 KVA-30 KVA) usually do the trick but, must be stored outside the building as they usually run on diesel.

Our finally item is restricted access.  5000 sq.ft in 100 rooms you say?  Yes, that is a serious productivity killer.  These are large machines, by the time your edge grinding is done and factoring the turning radius of the shot blast machines you find your productivity plummet.  There are other means of mechanical preparation that can be more productive and that leave an acceptable bond profile to apply epoxy coatings, epoxy flooring, decorative epoxy systems or other finished goods.

SHOT BLASTING PART 2 – LEARN SOME SHOT

SHOT BLASTING PART 2 – LEARN SOME SHOT

The second part our shot blasting series will cover, What is shot blasting, shot blasting technique and some limitations of shot blasting. Shot blasting is a form of floor preparation prior to a wide variety of seamless epoxy floors.

It is the preferred method by epoxy flooring contractors for their floor prep, prior to any application of epoxy floor systems and epoxy floor coatings. It is an enclosed system. Shot (steel customarily, with varying sizes and shapes) is contained in a storage hopper, the shot is then dropped down onto a blast wheel in motion where it is throw against the floor. This takes place as the machine is in motion. Speed of the machine as well as what grade shot used will dictate the bond profile achieved. The shot rebounds off of the surface, returns to the storage hopper, while the vacuum unit separates and collects the dust debris. Hence and enclosed system.

THINGS THAT DICTATE SHOT GRADE AND SPEED:

  • Existing coatings, adhesives, quality and cleanliness of existing concrete
  • The desired CSP profile as per manufactures recommendations to ensure bond strength.
  • The selected epoxy flooring finish, shot blasting can leave to much of a profile that can reflect and shot through thinner mil coating systems. AKA Blast lines.

Shot blasting is a preferred method of epoxy flooring contractors but, it is not the only one accessible to those who are qualified and knowledgeable. Shot blasting will not remove the thicker system 1/16” or more and you will have great difficulty. Substrates with any sort of flexible coating or membrane systems can cause problems, as the shot will not rebound off the surface and may penetrate and get stuck in said coating. Like wise could be said for adhesives. The effectiveness of removing adhesives, with shot blasting varies. If it a very thin layer and predominately cured, dried or brittle, shot blasting may be an effective floor prep. In other cases other floor preparation will prove more efficient and effective.

FOR MORE INFORMATION ON SHOT BLASTING AND FLOOR PREP SERVICE CONTACT US, WE LOOK FORWARD TO SPEAKING WITH YOU SOON.