Abstract
The author have been studying about gelations of various low pH. low lime muds after setting at high temperature (125-150°C) for 20 hours. And he found the following facts; (a) There are clear relations between gelations and concentrations of solids (volume % of bentonite or native clay solids) and lime. (b) The good condition can be kept at very low alkalinities and lime concentrations, when the solid contents are at a minimum. (c) The most suitable concentration of lime ranges is about from 5.0 to 8.0 grams per liter. (d) The best concentration of low gravity solids and lime for posthydration is clearly different from that for pre-hydration.
