Hi Thomas - yes I remember that. Cement is interesting chemistry, its more complex then its solid ratio. It has ingredients that modify surface tension, particle dispersion and attraction and the binder is very very fine. Its hard to find for me, useful technical info on it as they (civil engs) are looking for other things then what we machine builders are looking for. The E90 material is silimax with alumina/alox/carborumdum etc added. Its time for me to move along to building vs research.... Peter
edit - 1) Thomas would you send me a cup of Silimax? if so PM me for my address.
2) Heres Plank2 in the honey warmer 30C and my electric blanket