Lack of dimensioning methods
"You might say we're familiar with the technique but it's only now that we have the right equipment and computational models. With the improved analysis models and methods to predict what will happen to the road's load-bearing capacity, we can build stronger roads at better cost and thus promote the spread of stabilised roads," says Christian Busch, senior specialist at COWI.
For the moment, COWI, together with the Danish Road Directorate, has conducted a lime stabilisation pilot study on part of the new motorway between Odense and Ringe on Funen.
The Directorate has conducted another trial on the future motorway between Ønslev and Sakskøbing on Lolland. These pilot projects are now being followed up with full-scale projects.
Soil takes on properties of sand
Stabilisation is achieved by utilising the materials in the soil to achieve the desired strength. By adding lime, cement, or fly ash to the soil, it takes on the characteristics of sand and binds together into a rigid base.