I am planning to use Durisol/Nexcem blocks as my foundation drop beams/piers, so it is a bit easier for me, as I will simply use 5 cm of Durisol (wood crete) material followed by 5 cm of XPS as the slab edge (replacing traditional wooden formwork during pour, too).
There are many other options available for alternative designs, e.g.:
http://www.laros.com.au/wp-content/uplo ... 150108.pdf