Grind Cracked Concrete In An Easy Way

Concrete is a durable and widely used building material. However, over time, it can develop cracks due to various factors such as heavy loads, temperature fluctuations, or poor construction practices. Cracked concrete not only affects the aesthetics of a structure but also compromises its structural integrity. To maintain the longevity and safety of the concrete surface, it is crucial to address cracks promptly. In this article, we will discuss the process of how to fix cracked concrete.


Part 1: Grinding Cracked Concrete

Grinding cracked concrete is an essential step in preparing the surface for crack repair. The grinding process helps to remove uneven edges, smooth out rough surfaces, and create a clean and uniform area for effective crack repair. Here’s a step-by-step guide on how to grind cracked concrete:

Gather the necessary tools and equipment:

Prepare the work area:

  1. Clear the area of any obstacles or debris.
  2. Protect adjacent surfaces, such as walls or other concrete sections, with plastic sheeting or masking tape.

Safety precautions:

  1. Put on safety goggles, gloves, a dust mask or respirator, and hearing protection before starting the grinding process.
  2. Ensure that the work area is well-ventilated.

Start grinding:

  1. Begin by using the angle grinder with a diamond grinding wheel to grind down any raised edges or uneven surfaces around the crack.
  2. Move the grinder in a back-and-forth motion, applying even pressure.
  3. Avoid grinding too deep into the concrete, as this may weaken the structure.

Smooth the surface:

  1. After grinding down the rough areas, switch to a finer grit diamond grinding wheel to achieve a smoother finish.
  2. Continue grinding until the surface is uniformly smooth and level.
  3. Clean the surface:
  4. Remove all dust and debris from the ground concrete by sweeping or using a vacuum cleaner.
  5. A clean surface will ensure proper adhesion of the crack repair materials.


Part 2: Crack Repair

Once the concrete surface has been properly ground and cleaned, it’s time to address the cracks and restore the structural integrity. Here are some effective crack repair methods:

Assess the cracks:

  1. Examine the cracks to determine their width and depth.
  2. Cracks less than 1/4 inch wide are considered narrow cracks, while those wider than 1/4 inch are classified as wide cracks.
  • Narrow crack repair:

For narrow cracks, use a crack filler or a concrete patching compound.

  1. Clean the crack thoroughly, removing any loose debris or old filler.
  2. Follow the manufacturer’s instructions to apply the crack filler or patching compound using a trowel or putty knife.
  3. Smooth the surface of the repaired crack and allow it to dry according to the manufacturer’s recommendations.
  • Wide crack repair:

For wide cracks, an epoxy-based or polyurethane-based crack filler is recommended.

  1. Clean the crack and remove any loose material or debris.
  2. Use a wire brush or similar tool to create a rough surface inside the crack, which will enhance the adhesion of the filler material.
  3. Apply the epoxy or polyurethane crack filler into the crack, ensuring that it fills the entire void.
  4. Smooth the surface of the filled crack using a putty knife or trowel.
  5. Allow the filler material to cure according to the manufacturer’s instructions.
  6. Reinforcing with concrete staples or pins:In some cases, especially for wider or deep cracks, reinforcing the repaired area with concrete staples or pins can provide additional strength and stability.
  7. Drill holes on both sides of the crack, perpendicular to the crack line, using a masonry drill bit.
  8. Insert concrete staples or pins into the holes, ensuring they are securely anchored in the surrounding concrete.
  9. Apply a layer of epoxy or bonding adhesive around the staples or pins to further strengthen the bond.
  10. Allow the adhesive to cure before proceeding with the final surface treatment.

Surface treatment and finishing:

  1. Once the crack repairs have cured, it’s important to restore the aesthetics and protect the concrete surface.
  2. Apply the resurfacer according to the manufacturer’s instructions, using a trowel or squeegee.
  3. Smooth out the resurfacer and ensure it blends seamlessly with the surrounding concrete.



Grinding cracked concrete and performing effective crack repair is crucial for maintaining the durability and aesthetics of concrete structures. By following the step-by-step process outlined in this article, you can successfully grind cracked concrete and repair the cracks using appropriate methods and materials. Remember to prioritize safety by wearing protective gear and ensuring proper ventilation during the grinding and repair processes. Addressing cracked concrete promptly will help extend the lifespan of your concrete surfaces and maintain the structural integrity of your building.


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