Hinsdale Central High School
Hinsdale, IL
July 2021
Tensar® InterAx™ geogrid makes passing proof roll easy.
- Engineer: Eriksson Engineering
- Distributor: Road Fabrics, Inc.
Client's Challenge
The contractor encountered poor subgrade soils (CBR=1.3%) that made it difficult to pass proof roll. This threatened to delay asphalt paving operations, and a cost-effective solution was needed to keep construction on schedule.
Tensar Solution
Tensar designed a solution consisting of a 10" thick lift of aggregate stabilized with Tensar NX850 geogrid. This design required 19" less of excavation and backfill compared with a traditional design that doesn't use geogrid. The contractor was able to pass proof roll and did so in less time and roughly half the cost of using traditional methods.