Specific Gravity of Stabilised Soils
Hi Everyone,
Im working as a Consultant Engineer and have observed Nuclear Density Test results along with Sand Replacement Results which are slightly above the Zero Air Voids Line on a soil stabilisation project. Testing has been done to confirm the specific gravity of the natural untreated soil alongside checks on site to verify same soil used and the equipment used is functioning correctly. I have hypothesised that the addition of a nominal quantity of cement as part of the soil stabilisation process has resulted in the specific gravity increasing and thus raising the zero air voids line. Calculating the quantity of cement with a specific gravity of 3.15 to obtain the specific gravity indicated by the results however does not tally with the binder used on site. Could the reasoning be that there is a chemical reaction undergoing that is affecting the specific gravity?
Has anyone come across this previously or have insights on this topic? Any guidance would be much appreciated.
