Asphalt Reinforcement

Heavy Trafficking Trial, Rotaflex - Meltham Mills Road, UK

Client Kirklees Council
Contractor

Thomas Bow City Asphalt

Consultant Kirklees Council
Product

Rotaflex – Glass Fibre Asphalt Reinforcement

Quantity

700m²

Benefits

– Prevents settlement cracking
– Stops reflective cracking
– Reduces rutting
– Waterproofing
– Cost effective solution to road maintenance

Project Description
Kirklees Council Asset Management Policy aims to maintain the 1,900km of roads in its area by looking for the most efficient whole life costs possible. The council assessed the state of the heavily trafficked Meltham Mills Road to be unacceptable for safe passage due to a very stressed road surface. The road receives some of the highest loading in the area, taking approximately 1,800 HGV vehicles per week either passing or delivering to the local factories. In addition as a bypass to Meltham town centre it takes approximately 4,000 light vehicle traffic movements per week. Using the guidelines from the West Yorkshire Combined Authority (WYCA), the council decided on a 60mm binder course with 40mm SMA overlay with a predicted lifetime of 15 years, including first light maintenance at 5 years.

The Challenge
Whilst the design was to the required Kirklees Council guidelines, in line with their policy of reducing whole lifetime costs the highways team were looking for any improved techniques which could extend the maintenance periods still further. The site runs along the length of ABG Geosynthetics Ltd own offices and being heavily trafficked and easily monitored, the location presented an ideal site for a trial.

The Solution
ABG proposed a Rotaflex asphalt reinforcement geocomposite comprising a glass fibre geogrid backed with a polyester geotextile. The geogrid reinforces the road surface, preventing propagation of cracks through the surface course. By stopping these cracks it delays the breakdown of the road surface, considerably extending its life.

The polyester geotextile binds the bitumen used in the installation process, sealing the subsurface and avoiding damage caused by water penetration.

The trial included Rotaflex reinforced and unreinforced areas which were to be monitored over the following 5 years up to the first predicted maintenance point. At first, the finish was even across the whole road surface, but after only 4 years following several harsh winters and high traffic volumes, the unreinforced areas were showing distinct signs of distress. Depressions, potholes and delamination started to occur and these areas had to be patched prematurely.

The reinforced Rotaflex geocomposite areas showed no signs of stress. The conclusion is that the trial is a success, showing Rotaflex helps to strengthen new surfacing layers, prevents cracking and deformation. Rotaflex asphalt reinforcement geosynthetic provides a cost effective solution to road maintenance by extending the maintenance intervals and reducing whole life costs.

ABG Rotaflex geogrid system for asphalt reinforcement

The ABG Service
ABG assisted with technical comparisons, costings, design, supply and installation.

Contact ABG today to discuss your asphalt reinforcement project specific requirements and discover how ABG’s past experience and innovative products can help.

Additional information