Micro Surfacing on Cement Concrete

Micro Surfacing on Cement Concrete

Micro surfacing is typically applied on flexible pavement surfaces, such as asphalt roads, to enhance their performance and extend their life. However, applying micro surfacing directly on cement concrete surfaces is not a common practice. Micro surfacing is designed to adhere well to bituminous surfaces, and it may not bond as effectively to rigid surfaces like concrete.

Here are some reasons why micro surfacing is not typically applied directly on cement concrete and alternative solutions:

1. Bonding Issues:
   • Micro surfacing relies on adhesion to the existing pavement surface. While it bonds well with asphalt, it may not adhere as effectively to concrete due to the differences in surface characteristics and material properties.
2. Rigid vs. Flexible Pavements:
   • Micro surfacing is designed for use on flexible pavements, which can accommodate some degree of movement and deformation. Concrete, being a rigid pavement, has minimal flexibility, and the differential movement between the concrete and the micro surfacing layer can lead to delamination and failure.
3. Cracking and Joint Movement:
   • Concrete surfaces often have expansion joints and natural cracking. Micro surfacing may not effectively bridge these joints and cracks, leading to premature failure.
4. Surface Preparation Challenges:
   • The preparation of a concrete surface for micro surfacing may be more challenging than for asphalt surfaces. Concrete surfaces may require additional treatments to improve bonding and create a suitable substrate for micro surfacing application.
5. Alternative Treatments:
   • For concrete surfaces, alternative treatments such as concrete overlays, epoxy overlays, or specialized concrete sealers are more commonly used. These treatments are specifically designed to bond with and enhance the performance of concrete pavements.

If there is a need to improve the surface characteristics of a concrete pavement, it is recommended to consult with pavement engineers or specialists to determine the most suitable treatment. These professionals can assess the condition of the concrete, evaluate the desired outcomes, and recommend appropriate solutions.

In summary, while micro surfacing is an effective treatment for flexible asphalt pavements, it is not typically applied directly to cement concrete surfaces due to bonding issues and differences in pavement structure. Alternative treatments designed for rigid pavements should be considered for concrete surfaces to ensure long-term performance and durability.