The Altoona-Blair County Airport, a regional airport in central PA, faced a safety concern with one of its runways. Reflective cracking had occurred due to harsh freeze/thaw conditions during winter months. The daily impact on the airport pavements caused fatigue in the surface layer, making them vulnerable to further damage from moisture infiltration and traffic loading.
To address this issue, the project engineer recommended using paving interlayer fabrics to extend the design life of flexible pavement runways. However, they had never specified a sustainable asphalt paving interlayer fabric. A suitable solution was found in Petromat Enviro™, a paving fabric designed to be easily recycled by milling it into small pieces. This fabric effectively mitigates stress and moisture on runways, taxiways, and aprons, ensuring the preservation of pavements for smoother take-offs and landings.
To implement the solution, half of the existing runway wearing surface was milled off, and Petromat Enviro was directly installed on the milled surface. Petromat Enviro has optimal elongation, enabling its installation without a leveling course.
Finally, a 2-inch (5.08 cm) finished surface course was applied directly on top of the Petromat Enviro. The installation of 20,000 yd² (16,722 m²) was completed with ease.
Geogrid-reinforced embankment for GO Transit rail service expansion
GO Transit expanded rail service between Hamilton and Toronto, requiring a third track on a historic embankment near Sunfish Pond. A geogrid-reinforced slope with a steel sheet pile wall was implemented to meet structural and environmental requirements.
MSE walls with MIRAGRID XT for rail expansion
GO Transit used hybrid MSE walls with MIRAGRID XT geogrids to stabilize embankments on Lakeshore West Line, ensuring stability under space and load constraints.
MIRAFI geotextiles prevent subgrade failure and reduce track downtime
Canadian Pacific Railway (CP) identified track settlement issues and partnered with Solmax and Clifton Associates to implement a geosynthetic solution, reducing ballast use by 43% and completing repairs on a 72 ft section in under seven hours.