A new software tool is available to facilitate the best choice of specialist geomembrane materials for reinforcing treatment. Called ARCDESO, the software is available from Asphalt Reinforcement Services (ARS) for use alongside its suite of Glasgrid highway reinforcement systems. The company has recently used the two products to renew damaged carriageway on the M60 in Leicestershire and the A45 in Northamptonshire.
ARCDESO stands for Anti-Reflective Cracking Design Software. Road condition data gathered from visual surveys and structural assessments are fed into the computer package. The software then uses finite analysis to predict how the carriageway will perform, with or without the addition of secondary reinforcement. The analysis results indicate which of the three varieties and nine grades of Glasgrid reinforcing systems would offer the best solution.
Gerald Byrne, company director for ARS, explained: “The programme can calculate the optimum thickness of an asphalt overlay and the grade of reinforcement required to prevent reflective cracking within a road, caused by thermal or dynamic loading, from getting worse”.
ARS offer three renewal systems. Glasgrid is a polymer coated fibreglass matrix designed to improve siffness and load-bearing capacity within a fully flexible asphalt pavement. Added durability is offered to composite pavement construction with the use of CompoGrid which features a non-woven fabric attached to the Glasgrid reinforcement to regulate uneven layers of a carriageway and provide extra protection from moisture transfer. Finally, there is Gridseal, a polymer modified bond coat that enhances the level of protection against reflective cracking and provides a durable bond between the existing pavement and new asphalt overlay.
Each system is applied using a mechanical applicator with places 1.5m width rolls onto the road sub base. The fibreglass material is laid in tension, pushed flat against the surface with mechanical brushes and held in place using either a self-adhesive or the addition of a bitumen bond coat. Once installed, the membrane is overlaid with asphalt.
For further information: www.asphaltrs.co.uk