Some papers on EK in early 1950s are available thanks to growing of book and issue digitization, the famous Project Ocean. Those papers are very interesting. Quite a lot of phenomena discovered in that early stage of research are still attractive up to now.
However, it seemed that research on EK had been suspended for a while. It may be because both mechanism and engineering application of EK are very complicated.
In the past decade, there were quite a lot of breakthroughs on EK technique. One among those was EKG materials, a new category of geosynthetics which provides corrosion proof electrode; another one was smart DC power supply.
Smart DC power supply is truly important and to some extent, it makes large scale application of EK possible. This is a key technique that tackles the challenge of power demand and energy consumption; and it is still evolving. This is a fruitful area to explore.
In 1950s publications, we can see some discussions on compressibility and consolidation effect after EK treatment. This is another interesting area that inspires completely new constitutive model, which may help understanding of not only consolidation issue but also mechanism of unsaturated soil.
Breakthroughs in this overlapping research area are very encouraging. Researchers on polymer, power supply, sensor, mathematics, mining are welcome to communicate and collaborate.