Cracking and Seating
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Crack and Seat is a popular carriageway and pavement repair system. It’s a practical and economical way of preventing reflective cracking in asphalt overlays on concrete roads.
Cracking and seating can be used where the existing concrete slab is a minimum of 100mm thick and of Pavement Quality Strength. It is also suitable for use on reinforced concrete.
What is Reflective Cracking?
Reflective cracking is caused by movement or faults in the concrete slab reflecting into the asphalt overlay. Causes include: voids in the sub-base, thermal expansion/contraction, rocking road slabs or overload of the rigid pavement. Cracking and Seating can help alleviate these problems.
How does Crack and Seat work?
The concrete road slabs are cracked and seated back onto the sub-base. These new cracks then accommodate some of the thermal expansion/contraction thereby significantly reducing future reflective cracking.
The existing overlay is removed, then multiple hairline 45° fractures are induced which converts a rigid concrete road into a semi-flexible road base. The overlay is then applied - a minimum of 30/40mm for light to moderately trafficked roads, and 60/70mm for busier roads and industrial estates.
The Benefits of Cracking and Seating
- Minimal disruption (no need for road closure)
- Cost-effective (reduces overlay thickness) - typically 80% cheaper than reconstruction
- Environmentally friendly - uses existing material
- Quick - up to 1,500m2 per day
- Finds voids and soft spots
- Reseats the concrete back down onto the sub-base
- Stops concrete slabs rocking and moving
- Stops the transmission of traffic vibration to dwellings
- No adjustments needed to kerb lines, footways, thresholds, height restraints, barriers or street furniture
Contact D-Drill for a no obligation site visit and assessment. Call us today on 0800 33 74 55.