ABSTRACT
The selection of cementing materials for S/S of waste must consider the following aspects, based on the characteristics of the waste: (1) compatibility of the cement and the waste; (2) chemical fixation of contaminants; (3) physical encapsulation of contaminated waste and soil; (4) durability of final waste forms; (5) waste form leachability; and (6) cost-effectiveness of S/S. In practice, a variety of additives are often used with cementing materials to address all of these aspects. Some commonly used additives are described in detail in Chapter 8 as well as in previous publications.1,5 This chapter focuses mainly on the various hydraulic cement systems used for S/S of wastes.
