Mainmark restored support beneath a deteriorating rigid pavement in Oxford using its proprietary Teretek® resin injection technology, eliminating slab rocking and helping extend the service life of the existing highways asset without excavation or reconstruction.

Completed in just one week, the project treated 754m² of pavement while enabling planned resurfacing works to proceed with minimal disruption.

Addressing Concrete Pavement Slab Movement

Sub-base deterioration beneath the rigid concrete pavement had resulted in void formation, slab movement and reflective cracking through the overlying asphalt surface.

Water ingress through deteriorated joints was further eroding support beneath the slabs, increasing movement under traffic loading and accelerating pavement deterioration. The client required a fast, non-intrusive solution that would restore support ahead of resurfacing works.

The Solution

Mainmark used its proprietary Teretek® resin injection technology to restore support beneath the pavement structure.

Engineered resin was injected through small access points beneath the slabs to:

• Fill sub-surface voids

• Improve ground stiffness

• Re-establish slab-to-ground contact

• Remove slab rocking under load

The treatment was delivered without excavation, heavy plant or removal of the existing pavement structure.

The Results

During the one-week programme, Mainmark:

• Restored support beneath 754m² of rigid pavement

• Completed 390 injection points

• Eliminated slab rocking under load

• Improved load transfer across the pavement structure

• Extended the service life of the asset

• Reduced the need for future invasive repairs

Continuous monitoring throughout the works confirmed effective ground contact beneath the treated slabs.

Key Benefits

Non-Intrusive Delivery

Restored pavement performance without excavation or reconstruction.

Rapid Programme

Completed within a single week, reducing disruption to road users and surrounding operations.

Extended Asset Life

Addressed the underlying loss of support to help slow ongoing deterioration and defer costly replacement works.

Reduced Environmental Impact

Retained the existing pavement structure, avoiding excavation, waste removal and the carbon associated with reconstruction.

"Performance issues in rigid pavements are typically driven by loss of ground support rather than failure of the slab itself. By improving the condition of the underlying materials and restoring contact, we can significantly improve load transfer and extend asset life without the need for invasive reconstruction."

David Hedley, Infrastructure Lead, Mainmark