The original thoughts on the use of large blocks of EPS Geofoam came about by stacking sheets of the material high enough to provide stability needed to withstand the harsh weather, poor soil and subsoil composition, and the rolling nature of Norway’s roadways. Block production evolved and is still made in multiple thicknesses, and sizes.
One would think that engineers from the USA would have taken notice of this breakthrough in construction methods, but no. Japan’s capital city, Tokyo would become the next major project recorded. Haneda Airport (Tokyo International Airport) required major runway expansion, and EPS Geofoam was ideally suited to complete the task in record time, with significant savings over the cost of soil void fill.
The first US project using EPS Geofoam was in Colorado in 1989. That’s seventeen years before Geofoam was considered satisfactory for embankment support and roadbed.
To touch on how impactful Geofoam was on Japanese engineers, it’s remarkable that within a two-year period, 1985 – 1987, more than 2000 projects included 46 million square feet of Geofoam. Wow!
A stretch of Highway 160 between Durango and Mancos experienced a slope destabilization, resulting in a landslide. EPS Geofoam proved itself in not only supporting and stabilizing the embankment but saved time and money. Engineers across the country are now both knowledgeable and utilizing EPS Geofoam to cut construction time and money.
Geofoam was used to create highway side slope stabilization to prevent any similar issues. The use of geofoam versus conventional restoration resulted in an 84% reduction to the total cost of the project.
Source: Colorado Hwy 160 project