استاندارد D2487 ASTM - روش استاندارد برای طبقه‌بندی خاک‌ها به‌منظور مقاصد مهندسی (سیستم طبقه‌بندی خاک یکپارچه)

Scope Referenced Documents Terminology Summary TABLE 1 Significance and Use FIG. 1 FIG. 2 Apparatus Sampling Classification of Peat Preparation for Classification FIG. 3 FIG. 4 FIG. 5 Preliminary Classification Procedure Procedure for Classification of Fine-Grained Soils (50 % or more by dry weight passing the No. 200 (75-μm) sieve) Procedure for Classification of Coarse-Grained Soils (more than 50 % retained on the No. 200 (75-μm) sieve) Report Precision and Bias Keywords X1. EXAMPLES OF DESCRIPTIONS USING SOIL CLASSIFICATION X1.1 X2. USING SOIL CLASSIFICATION AS A DESCRIPTIVE SYSTEM FOR SHALE, CLAYSTONE, SHELLS, SLAG, CRUSHED ROCK, ETC. X2.1 X2.2 X2.3 X2.4 Examples of how soil classifications could be incorporated into a description system for materials that are not naturally occurring soils are as follows: X3. PREPARATION AND TESTING FOR CLASSIFICATION PURPOSES BY THE WET METHOD X3.1 X3.2 X3.3 X3.4 X3.5 X3.6 The portion of the field sample finer than the 3-in. (75-mm) sieve shall be obtained as follows: X3.7 Determine the liquid limit and plasticity index as follows: X3.8 Determine the particle-size distribution as follows: X4. AIR-DRIED METHOD OF PREPARATION OF SOILS FOR TESTING FOR CLASSIFICATION PURPOSES X4.1 X4.2 X4.3 X4.4 The portion of the field sample finer than the 3-in. (75-mm) sieve shall be obtained as follows: X4.5 X5. ABBREVIATED SOIL CLASSIFICATION SYMBOLS X5.1 X5.2 X5.3 The abbreviated system should consist of the soil classification symbol based on this standard with appropriate lower case letter prefixes and suffixes as: X5.4 The soil classification symbol is to be enclosed in parentheses. Some examples would be: