Fortifix Asphalt Reinforcement – Yorkshire Water
Location Yorkshire Water access road, Chelker Resrvoir, Skipton
Start date 06/07/2020
Project requirement The Chelker Reservoir lies within an area of outstanding natural beauty at the southern edge of the Yorkshire dales and is only 2 miles as the crow flies from the Bolton Abbey heritage site. Following a recent programme of sheet piling works and heavy trafficking from site vehicles, the entire length of the access road had suffered from reflective cracking. Clients Yorkshire Water required a long-lasting resurfacing repair to fix the potholes and areas of cracking. The remote area is subject to high levels of annual rainfall with frequent heavy downpours and wintry conditions, so needed a rugged repair option to reduce ongoing maintenance costs and prevent early recurrence of the problem. The low tensile strength of asphalt means it is subject to cracking as a result of settlement, fatigue, temperature fluctuations and vehicle loadings following periods of wet and cold weather.
Services supplied The Fortifix steel cord reinforcement option was recommended as providing the best solution to reflective cracking for resurfacing contractors Calder CAD.
Outcomes The low-strain properties of the steel grid and the unique seven strand cord profile provides a strong interlock into the asphalt, giving a 32% longer design life than glass fibre grids. A thinner layer of asphalt is also required as a result (in this case a 50mm surface course of AC 10 dense 100/150). Following planing and patch repairs by Calder CAD, the Fortifix 1C was laid, supplied cut to the correct width so it could be simply rolled out into the bitumen emulsion bond coat (Mulitbond 70).
Calder CAD and Managing Director Jason Dooling oversaw the installation. “The Fortifix grid was easy to install and absorbed nicely into the tack coat. Additional emulsion was applied over areas where the textile overlaps widthways and at the start of a new roll to make sure it didn’t lift up as we laid the asphalt. The grid was easy to cut around the raised ironwork using straight edge snips, and the entire resurfacing was completed in one morning with minimal disruption to the local residents”.