Tencate: A24 Leatherhead, Surrey

The A243, in south west London, runs from Junction 9 of the M25 towards Kingston upon Thames. The original pavement construction, which comprised a bituminous surface overlying an unreinforced concrete slab road base, was suffering from extensive reflective cracking, settlement and fretting. Carriageway deterioration was further exacerbated by utility operations. The high peak-day time traffic volumes meant that it was not possible to facilitate repair work during the day. Night-timer working had noise restrictions.

After planning off the old surface, the exposed concrete carriageway was covered with the polymeric Geocomposite PGM-G 200/200, manufactured and supplied by TenCate Geosynthetics. Geocomposite PGM-G 200/200 is a mechanically bonded continuous filament non-woven geotextile made from 100% polypropylene and reinforced with high modulus glass filaments. The product is characterised by its uniform bonding, optimum bitumen capacity and efficient load uptake at very low strains of less than 3%.

Benefits include:

  • Retard formation of reflection cracks in the bituminous inlay
  • Seal cracks in the underlying layers and prevent water and oxygen penetration
  • Reinforce the asphalt layers of the carriageway
  • Prolong carriageway life.

The PGM 200/200 was overlaid with a Supaflex wearing course. Efficient working methods meant that 5,000sq.m of road refurbishment was completed over a 3 night period.

For further information: www.tencate.com