soils in construction (engineering) douglas kowalewski
TRANSCRIPT
Soils in Construction (Engineering)Douglas Kowalewski
SOIL PROPERTIESParticle Size Distribution
Gravel, Sand, Silt, Clay
Fi = (Ms-ΣMi) / Ms
Fi = Fraction of particles with diameter finer than “i”
ΣMi = summation of mass of particles with diameter finer
than “i”
SOIL PROPERTIES
Atterberg Limits: Soil Plasticity
Characterize the fine-grained fraction of soils
Measure the Following Water ContentPlastic Limit (PL)Liquid Limit (LL)Plastic Index (PI)
Plastic Index = LL – PL0: Nonplastic
1-5: Slightly Plastic5-10: Low Plasticity
10-20: Medium Plasticity20-40: High Plasticity
>40: Very High Plasticity
GEOTECHNICAL – Unified Soil Classification System
M = Silt (Plots below the A-line)C = Clay (Plots above the A-line)
CLAY
SILT
Grain Size Analysis: FINES
Plasticity: FINESGEOTECHNICAL – Unified Soil Classification System
H = High Liquid LimitL = Low Liquid Limit
LOW HIGH
Fine Soil
Plastic Index = LL – PL0: Nonplastic
1-5: Slightly Plastic5-10: Low Plasticity
10-20: Medium Plasticity20-40: High Plasticity
>40: Very High Plasticity
GEOTECHNICAL – Unified Soil Classification System
Reading: Appendix B USCS: pg 1-22
SOIL REPORTS
Site Map
GEOTECHNICAL