Resistance to Abrasion in Hardened Concrete

Resistance to Abrasion in Hardened Concrete

1. Definition:

   • Abrasion resistance refers to the ability of concrete surfaces to withstand wear caused by friction.

2. Importance:

   • Essential for floors, pavements, and other surfaces exposed to continuous wear.
   • Ensures durability and longevity of concrete structures.

3. Factors Influencing Abrasion Resistance:

   • Compressive Strength: Directly proportional to abrasion resistance; higher compressive strength often means better resistance.
   • Surface Finishing: Proper finishing techniques enhance resistance.
   • Curing Methods: Adequate curing improves the microstructure and surface hardness.
   • Aggregate Quality: Hard, durable aggregate improves abrasion resistance.

4. Testing Methods:

   • ASTM C779/C779M: Standard test method for determining the abrasion resistance of horizontal concrete surfaces.
   • Böhme Abrasion Test: European standard test using a rotating disc to measure abrasion loss.

5. Improvement Techniques:

   • Use of Admixtures: Adding materials like silica fume or fly ash can enhance hardness.
   • Surface Treatments: Application of sealers or hardeners to improve surface toughness.
   • Optimal Mix Design: Adjusting the water-cement ratio and selecting appropriate aggregates.

6. Applications:

   • Concrete floors in industrial buildings, warehouses, and loading docks.
   • Pavements in high-traffic areas, including roads and walkways.

By understanding and applying these key points, better resistance to abrasion in concrete can be achieved, thereby enhancing the performance and lifespan of the structure.