Proper Joint Preparation Prior to Sealing and Resealing Concrete Joints

Proper joint preparation is critical for ensuring the long-term performance and durability of concrete pavement sealants.

According to the tech brief, Proper Joint Preparation Prior to Sealing and Resealing Concrete Joints, joint preparation, which accounts for just 5-8% of total sealant costs, plays a significant role in extending sealant life and preventing water infiltration, erosion and structural damage. Key goals include reducing water entry, minimizing the risk of incompressible materials causing joint failures and preserving the integrity of the pavement. Innovative methods such as media blasting, high-pressure power washing (up to 3,500 psi) and precise sawing techniques are highlighted as essential components for achieving cleaner, more effective joints.

The tech brief outlines clear step-by-step procedures for both new construction and resealing projects.

·    For new pavements: Professionals are advised to temporarily leave saw slurry in the joints to protect against contaminant intrusion during construction, followed by thorough cleaning and preparation before sealing. 

·    For resealing: Joint preparation prior to resealing existing joints is dependent on the type of existing sealant material. Methods will vary depending on sealant type, but preparation procedures which include sawing, media blasting and air blowing, ensure clean, textured surfaces that enhance bond performance. 

Additionally, the tech brief notes that airport facilities often demand more stringent joint preparation due to wider, beveled designs. By following these optimized procedures, contractors can significantly improve sealant performance while ensuring compliance with environmental and workplace safety standards.

This practical guide reinforces the importance of meticulous preparation, offering crucial insights for maximizing pavement lifespan and performance in varied applications. Read the entire tech brief here: https://ow.ly/Z6Vg50VtgQY