Overlaid Concrete & Reflective Cracking

The Problem: 

When asphalt is overlaid on concrete pavements, it often fails at the exact locations of the underlying concrete joints. This is known as reflective cracking—and it's a common issue on many older UK trunk roads and motorways.

These failures occur because:

• Asphalt cannot accommodate the high levels of movement concentrated at concrete bay joints
  
• Cracks also appear above existing fractures in CRCP (Continuously Reinforced Concrete Pavement)
• Traffic loading and water ingress rapidly worsen the condition, eventually forming a linear pothole

A tell-tale sign is the audible “b-bump” as vehicle tyres drop into and out of the degraded joint.

The Solution:  Jointmaster Reflective Crack Repairs

Using BBA HAPAS-approved Jointmaster, these cracks can be permanently treated with a flexible, deep-set repair system designed to handle the unique demands of reflective cracking.

Typical Repair Process:

• Cut a deep recess, usually 40–50mm, to penetrate into the concrete and remove all failed asphalt
• Determine the width based on extent of cracking—commonly 200–300mm, or more for severe cases
• Install Jointmaster compound, a flexible material with high polymer content and crumb rubber additives for durability and recovery

Key Benefits:

• ✅ Accommodates thermal movement at concrete joints

• ✅ Seals against water ingress to prevent crack growth

• ✅ Withstands wheel tracking from HGVs and repeated traffic loading

• ✅ Restores smooth ride quality and eliminates joint noise

• ✅ Extends the life of both asphalt overlay and underlying concrete

A robust solution to reflective cracking that delivers long-term performance, safety, and value for asset owners.