AgriVision Equipment

This project had been on a tight budget since it began in Spring 2023. The site was originally stabilized with a woven fabric and a 4” crushed rock section. The section failed in the Spring of 2024 when it encountered heavy rains and construction traffic. The Owner and Contractor needed a reliable solution that would fix the problem before they could begin paving the building aprons. Given the previous failure, it was important that the solution save them on added construction costs. The owner was considering a geogrid and a chemical solution.

Tensar was called to give an alternate section design for the owner. DCP testing of the fat, expansive clay resulted in a design CBR of 1.5%. The Tensar design consisted of a 6” PCC pavement over a 7” aggregate section with an NX850 geogrid based upon the subgrade modulus. Tensar and Coleman Moore put together a submittal for the Contractor to present to the Owner. The Owner saved $30,000 on a smaller sized apron job vs the chemical stabilization. Construction time was also saved since Lenox, IA continued to receive moisture, which would have prolonged the chemical option. Aggregate trucks continue to rut the larger site where the fabric is installed, however, rutting is not present in the geogrid stabilized areas.