Thus, strictly speaking, permeability is a characteristic which isapplicable in specific situations
only, such as for dams and tunnel linings where significant heads can develop. Permeability can
be controlled in a similar manner to absorption.

Factors Affecting

The transportation processes are influenced by a large number of material and environmental
parameters, for example, as illustrated in Figure 6.

Hydrate Chemistry
Absorption ------------ Hydrate Structure ----------------- Cement Type
Capillary Size and Degree of Interconnection -------- W/C Ratio
Diffusion
Pore Fluid Content ----------- Aggregate Type
Permeability ---------- Pore Fluid Chemistry ----------- Curing Conditions
Environmental Conditions

--------- primary parameter ----------- Secondary parameter