Shotblasting: The Preferred Method for Surface Preparation

IMAG1414-300x168   Miami-Airpot-Shotblasting

Shot blasting concrete remains the #1 choice for surface preparation of any flooring manufacture and contractor concerned about bonding a coating to a concrete floor surface. In fact, the term “surface preparation” came to be known with the introduction of early shot blasting machines. Shot blasting can profile concrete slabs for a thin film coating or a ¼” morter. Bridge contractors can testify as to why surface preparation is so important prior to the installation of either concrete or epoxy overlays. Shotblasting remains the surface preparation of choice for architects and engineers who write specs for the bridge industry. Shotblast Floors, Inc has a fleet of shot blasting equipment ready to move anywhere in the United States. Surface preparation is our business and we do it safely, cost-efficiently and always on schedule!Shotblast Floors has several shot blaster with blasting paths ranging from 10 to 48 inches and removal rates from about 200 square foot per hour to up to 30,000 square feet per hour. We have both electric and diesel blasters

What is Shot Blasting? Shot blasting is a cost-effective and environmentally-friendly method for preparing asphalt, concrete and steel surfaces. This timesaving process strips, cleans and profiles the surface while leaving the resulting surface ready for chemical treatments, coatings and overlay materials.Shot blasting can produce the International Concrete Repair Institute’s (ICRI) concrete surface profiles of CSP 3 through CSP 8.

Shot blasting produces excellent bonding characteristics that promote better adhesion and reduced coating failures.
How Does Shot blasting Work?Shot blasting systems use a high-performance, airless, centrifugal or perimeter-fed blast wheel. In both types of wheels, kinetic energy charges steel shot by the blades on the rapidly rotating blast wheel, and the steel shot propels at a high velocity toward the surface. The shot strikes the surface and rebounds, and the shot and debris then enter an air-wash separator where the dirt and debris are separated from the shot.The shot is recycled to the blast wheel repeatedly while the dirt and debris are transferred to the dust collector. This creates a steady blast of kinetic energy that strips laitance, coatings and surface contaminants while profiling the surface in one step. The dirt, dust and debris deposit in easy-to-handle bins or quick change-bags, reducing exposure to workers and the environment. During operation, shot blasting is virtually dust-free.

Different ICRI concrete surface profiles can be obtained by varying the shot size and travel speed. Selecting the shot size is critical to proper performance—the larger the abrasive, the larger the impact power, resulting in a larger profile. The smaller the abrasive, the less impact power, resulting in a smaller profile. A surface preparation specialist can help you select the correct abrasive size for a particular project or application.

What Are the Benefits? Shotblasting does not require harsh chemicals or acids, and it does not necessitate containment. When used properly, little to no dust is emitted into the atmosphere, and the process has a minimal carbon footprint. The largest commercially available shotblast system consumes 28 gallons of diesel fuel and 1,000 pounds of steel abrasive to blast one lane-mile. This correlates to a carbon footprint of 0.543 tons per lane-mile. Compare this to 558 tons of carbon emissions to produce a lane-mile of asphalt and 2,408 tons of carbon emissions to produce a lane-mile of concrete freeway.From a sustainability perspective, preserving roadways and bridges instead of replacing them makes sense. The low cost of shot blasting provides many benefits when compared to other pavement preservation methods. At a cost of roughly $6,680 per lane-mile, it costs one-twentieth the cost of asphalt repaving, one-third of the cost of chip seals and one-seventeenth the cost of a 2-inch asphalt overlay.

It also saves time and money by reducing material costs, labor and traffic control costs with shorter lane closure times. Shot blasting is the only process that has been proven to restore both micro and macro texture to asphalt and concrete roadways. This translates into higher skid resistance and safer roadways. If you couple shot blasting with available chemical treatments, the pavement life can be extended to five years, reducing the need to repave roadways.

To prepare concrete and asphalt surfaces for epoxy coatings, urethane coatings, MMA broadcast systems or polymer modified overlays, most manufacturers specify shot blasting as their preferred method of surface preparation. It produces a clean profiled substrate in one pass with no chemicals or water. No additional time is needed for the substrate to dry.

The product can be applied once the surface is blasted, which means less lane closure time and a faster return to service. It eliminates drying time and costly and time-consuming disposal methods associated with other surface preparation methods. The production rate, finish profile and low operating cost make shot blasting an important tool to help maintain, repair and restore the world’s infrastructure system of roadways, airports and bridges.

Typical Applications

Preparation is the key to any successful installation. Over 80% of coating failures can be attributed to improper or in sufficient prep. Shot blast Floors, Inc can perform surface preparation tasks ranging from very light etching to more aggressive removal of surface mortar down to coarse aggregate. They also are a cost-effective method for removing dirt, grime and chemical contaminants from large areas and for prepping substrates for self-leveling or polymer overlays, epoxy toppings and most coatings. Another big advantage of shot blasting is that it produces very little airborne dust or debris, making the method a good choice for floors in sensitive areas, such as food preparation facilities or manufacturing plants.

What Shot Blast can’t do effectively is remove rubbery mastics or heavy elastomeric coatings, because the steel shot will just bounce off the surface. As a dry process it allows for immediate application of coatings shortening installation times.

Shotblasting Benefits:
Perfect for industrial floors, warehouses, road and airport maintenance, and parking garages, this shot blaster is an environmentally-sound choice for your surface preparation.
Excellent for industrial floor prep, road and airport maintenance, asphalt blasting, decontamination, and much more
Labor and time-saving shot blasting process strips, cleans and profiles in one step – cost effective and friendly to the environment
Operates virtually dust-free – healthier for the operator and workforce
Prepares concrete for recoating or application of overlays
Removes markings, dirt, and old coatings
Prepares parking lots and garage decks
Cleans factory and warehouse floors
Ideal for airport runways
Used on bridge decks and highways
Stencils patterns for decorative concrete applications
Marine industry: removes paint, rust and marine growth
Cleans ship and aircraft carrier decks
Removes nonskid coatings
Cleans offshore platforms
Removes rust and paint
Prepares petroleum and water storage tank surfaces
Cleans brick or stone
Prepares asphalt surfaces