Studies on Hydration Swelling and Bound Water Type of Sodium- and Polymer-Modified Calcium Bentonite

Table 1

Physical properties of polymer modifier.

	Preparation method	Ionic degree	Concentration
CPAM	Solution polymerization	8.91 mol%	2.7 wt%
APAM	Solution polymerization	4.1 mol%	3.5 wt%