A useful but somewhat dated review covering permeability and many of the permeation capacity-related processes considered here was provided by Hearn et al.39 In general, however, references relating to the structures and properties discussed in this chapter are unfortunately widely dispersed in the journal and conference proceedings literature. Much of the journal literature is becoming available via on-line access, but unfortunately that is not generally true of conference proceedings, which are often difficult to obtain. The relevant technical journals include Cement and Concrete Research, Cement and Concrete Composites, Materials and Structures, and others less commonly cited. The use of backscatter SEM to characterize the microstructures of concretes was featured in a recently published special issue of the journal Cement and Concrete Composites.68
