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Application: Shot blasting for construction

Engineered shot blasting solutions for predictable surface preparation and faster production.

See detailed overview, process notes, and recommendations for this industry use-case. For matching spares or machine selection, request a quick quote.

Sa 2.5 / Sa 3 finish High throughput Roller conveyor blast Automated process Anti-corrosion prep PAN India installations
Shot blasting for construction
Sa 2.5
Cleanliness standard
500–3000
kg/hr throughput
Rz 40–70
Surface profile (µm)
1 pass
Full cleaning in single pass
About this application

Shot blasting for construction

Concrete Shot Blasting 

Shot blasting concrete is a surface preparation technique used in construction to clean, roughen, or profile concrete, steel, or other materials. It involves the use of high-speed steel shots (small spherical metallic beads) fired through a specialized shot blasting machine onto the surface to be treated. The impact of the shots removes dirt, rust, scale, or other surface contaminants and can also produce a textured surface, increasing the bond strength between the surface and the subsequent coating or overlay material. Shot blasting for construction is commonly used in flooring and concrete surface preparation, steel surface cleaning, and surface preparation for painting or coating application.

Probably at this point, you're asking why an abrasive blasting machine is used. Shot-blasting concrete floors are necessary for a variety of reasons. For instance, if you want to paint concrete or apply a new coat of epoxy or urethane, the surface must be clean and free of any chemicals, adhesives, and previous coatings. Concrete floors can be shot-blasted to ensure optimal adherence and prolong the lifespan of the coating. Blasting concrete is also excellent for giving concrete texture and creating "peaks and valleys." You increase the surface area and give the coating more to "grab" while it cures in addition to creating a fantastic look.

The two methods listed below are employed during shot-blasting during construction. The first method is referred to as wheel blasting. By rotating a turbine wheel, the wheel blasting method turns electric motor energy directly into kinetic abrasive energy. Each wheel has a capacity ranging from roughly 60 kg per minute to 1200 kg per minute. Wheel blasting machines are used when huge parts or large sections of surface need to be cleaned, desanded, descaled, deburred, de-rusted, or otherwise processed.

The second method is known as "air operated shot blasting machine," and it uses compressed air pressure to drive abrasive material. The abrasive blasting pot, dust collector, and abrasive recycling system all function together in the blasting chamber. To fully reclaim floors that transport the abrasive and clean the surface, one must either shovel or sweep the abrasive back into the blast pot.

Shot Blasting for Construction Benefits

Regardless of the technology employed, shot-blasting offers the following benefits:

  • It can aid in creating a matte, smooth surface.
  • A metal object with a surface coating may be more long-lasting and durable after being shot-blasted.
  • It can be applied to steel surfaces to eliminate rust.
  • A permanent link between the protective coat and the shot-blasted surface can be formed with the help of shot-blasting.
  • Shot-blasting can be used to draw attention to flaws and imperfections on metal surfaces.
Key Use Cases

Key Use Cases

Common production scenarios where shot blasting delivers the best finish, adhesion and throughput.

Pre-paint / Powder-coat prep

Remove mill scale and create a controlled profile for strong coating adhesion (Sa 2.5 / Sa 3).

Anti-corrosion surface cleaning

Uniform blast cleaning for steel plates, beams and fabricated structures before primer / epoxy.

Structural & fabrication lines

High-throughput processing on conveyor / roller lines with consistent finish and repeatable output.

Weld seam / scale removal

Clean weld areas, edges and heat-affected zones to improve coating quality and inspection readiness.

Deburring & edge rounding

Remove burrs and sharp edges on components for safer handling and better downstream fit-up.

Single-pass finish targets

Optimized media + wheel setup to achieve full cleaning in one pass with predictable surface profile.

Process Flow

Blasting process — step by step

A practical flow used on production lines to consistently hit Sa 2.5 / Sa 3 targets with the right profile.

  1. 1
    Loading & infeed
    Steel sections or plates are placed on the roller conveyor. Feed speed is set according to section weight and required cleanliness level.
  2. 2
    Blast chamber
    Multiple blast wheels (4–8 units) throw steel shot at 70–80 m/s, covering all 4 sides of the section simultaneously. No rotation needed for flat profiles.
  3. 3
    Abrasive recovery
    Used shot falls to the floor screw conveyor, is elevated to the separator, cleaned of dust and broken shot, and recirculated back to the blast wheels.
  4. 4
    Dust collection
    A pulse-jet dust collector captures fine dust and broken abrasive particles. Clean air is returned to the workshop — no external exhaust needed.
  5. 5
    Outfeed & inspection
    Blasted sections exit on the outfeed conveyor. Surface is inspected against Sa 2.5 comparator before primer application, ideally within 4 hours.
Machine Suggestions

Recommended machines

Machines we quote for this job. Send size, material and finish — we will confirm the fit.

Roller Conveyor Shot Blasting Machine
15-30Lakh

Roller Conveyor Shot Blasting Machine

Roller conveyor shot blasting machine

Product Roller Conveyor Shot Blasting Machine
Machine Type Roller Conveyor
Grade Semi-Automatic
Pressure 6-7 Bar
Number Of Doors One
Power 420 Volt
Wheel Blasting Machine
4LAKH-80LAKH

Wheel Blasting Machine

The wheel blasting machine is a powerful surface treatment equipment imp...

Product Wheel Blasting Machine
Material MS Steel
Grade Semi-automatic
Power 3 HP
Capacity 200 KG
Number of Door Single Door
Shot Blasting Room
5Lakh -10Lakh

Shot Blasting Room

When compared to open-air blasting, the controlled environment of a shot...

Material Mild Steel
Motor Power 10 Hp
Machine Type Automatic, Manual
Cleaning rate 3-5 sqr. mtr/ hr
Frequency 50 Hz
Voltage 415 V
Portable Shot Blasting Machine
35k - 1.1Lakh

Portable Shot Blasting Machine

These portable shot blasting machines are hydraulically tested to 250 PS...

Compressed air required at 80 psi 60 - 217 cfm.
Storage tank capacity 150 - 1000 kg
Grade Manual
Approx cleaning rate 4 - 21 Sq. Mtrs./Hr.
Std. blast hose length 5 - 10 mtrs.
Types of dust collector Fabric bag dust collector/ Reverse pulse jet pleated filter dust collector
Grit Blasting Machine
40K - 5Lakh

Grit Blasting Machine

A grit blasting machine is a machine used to remove the rough surface of...

Abrasive Tank Capacity 150 - 1000 Kg
Material Mild Steel
Machine Type Portable, Cabinet
Usage Surface Finishing
Grade Manual, Semi-Automatic, Automatic
Specs

Technical specifications

Typical ranges for roller conveyor blasting lines. Final specs depend on job size, wheel count and finish target.

Parameter Typical value / range
Cleanliness standard Sa 2.5 (standard) / Sa 3 (on request)
Throughput 500–3000 kg/hr (depends on section size, rust grade & line speed)
Surface profile Rz 40–70 µm (achieved by shot/grit mix and wheel parameters)
Blast wheels 4–8 units (coverage on all 4 sides, depending on chamber design)
Throwing speed 70–80 m/s (wheel dependent)
Abrasive recovery Floor screw conveyor → elevator → separator → recirculation to wheels
Dust collection Pulse-jet dust collector (fine dust capture; clean air return)
Primer window Ideally within 4 hours after blasting (site conditions may vary)