TABLE OF CONTENTS The following notation is used in this chapter:
| Symbol | Definition |
|---|---|
| a | Correction factor for specific gravity (hydrometer test) |
| A | Activity of clay fraction |
| C c | Coefficient of curvature |
| C u | Coefficient of uniformity |
| D | Soil grain size (also known as soil particle diameter) |
| D 10, D 30, D 60 | Particle sizes for a percent finer of 10%, 30%, and 60%, respectively |
| F | Percent finer, also known as percent passing (sieve and hydrometer) |
| G s | Specific gravity of soil solids |
| K | Correction factor (hydrometer test) |
| L | Effective depth (hydrometer test) |
| LI | Liquidity index |
| LL | Liquid limit |
| M R | Dry mass of soil retained on no. 200 sieve |
| M s | Dry mass of soil specimen |
| M w | Wet mass of soil specimen |
| M 1 | Mass of empty evaporating dish (hydrometer test) |
| M 2 | Mass of evaporating dish plus dry soil (hydrometer test) |
| M 3 | Mass of dry material, that is, M 3 = M 2 ? M 1 (hydrometer test) |
| PI | Plasticity index |
| PL | Plastic limit |
| R | Corrected hydrometer reading, that is, R = R s ? R c (hydrometer test) |
| R c | Hydrometer composite correction (hydrometer test) |
| R DS | Cumulative amount of dry soil retained on a given sieve (sieve analysis) |
| R s | Actual hydrometer reading (hydrometer test) |
| SL | Shrinkage limit |
| t | Time, min (hydrometer test) |
| T | Temperature, C |
| w | Water content of soil |
As mentioned in Chap. 3, certain index tests can be used to classify the soil. Two different types...
