Page 306 - Planning and Design of Airports

100–200
5–15
100–125
Fair to
Slight to
Medium to very
suitable poor medium high 100–200 5–15 100–125 Practically Medium Medium to very impervious high suitable 100–200 4–8 90–105 Poor Medium to Medium to very high high suitable 100–200 4–8 80–105 Fair to High Medium to very poor high suitable 50–100 3–5 90–110 Practically High Medium
Not Not Not Not Not Not Not
Fair to good Fair to good Poor Poor Poor to very poor Poor to very poor Not suitable

Silts, sandy silts, gravelly silts, or diatomaceous soils Lean clays, sandy clays, or gravelly clays Organic silts or lean organic clays Micaccous clays or diatomaceous soils Fat clays Fat organic clays Peat, humus and other Characteristics of Soil Related to Airport Pavement Foundations

ML CL OL MH CH OH Pt
compress- ibility LL compress

Low < 50 High ibility LL<50 Peat and other fibrous organic soils

Fine grained soils TABLE 7-3