Improving the strength and reducing the shrink/swell potential of soils has been essential for as long as construction has existed. The Mesopotamians and the Romans had each discovered that pathways and roads with weak soils could be improved with the addition of pulverized limestone (calcium) thus improving the load carrying capacity of the structure. Many of these early stabilized roads still exist today.
During the 1960's and 1970's modern methods of soil modification/stabilization developed out of necessity. Shortages of aggregates and fuel resources forced engineers to consider alternative techniques for strengthening soils as opposed to traditional methods that required removal and replacement.
In recent years, intensive research has lead to an advanced knowledge, not only of application techniques, but also in optimal material combinations and treatment rates. These findings, coupled with new equipment designs and a better understanding of the best uses for soil modification/stabilization, have allowed modern soil modification/stabilization to once again gain momentum in construction practices.