Environmental Engineering Reference
In-Depth Information
PLATE 5.23 (
Color Plate 5.23
follows
page 396.)
AMPHIBOLITE (Tres Ranchos, Goias,
Brazil).
PLATE 5.24 (
Color Plate 5.24
follows
page 396.)
PHYLLITE (Minas Gerais, Brazil).
PLATE 5.25 (
Color Plate 5.25
follows
page 396.)
SLATE (Santa Catarina, Brazil).
Competent Rock
Intact rock that is fresh, unweathered, and free of discontinuities and reacts to applied
stress as a solid mass is termed competent or sound rock in engineering nomenclature.
Permeability, strength, and deformability are directly related to hardness and density (see
Section 3.2.1)
as well as to fabric and cementing. The general engineering properties of
common rocks are summarized in
Table 5.16.
