ASTM Reference Soils Program
August 1997
ASTM REFERENCE SOIL SUMMARY ANALYSIS SHEET
For
ASTM REFERENCE SOIL CH-1 & TEST METHOD D 698
(Testing Fat Clay (CH), Vicksburg Buckshot Clay,
Using
ASTM Test Method D 698 – 00, Method 1A, Optimum Water Content / Dry Unit
Weight; Determined by
ASTM Reference Soils & Testing Program)
DRY UNIT WEIGHT
LIMITS OF ACCEPTABLE TEST RESULTS
OPTIMUM WATER CONTENT
Average Optimum Water Content = 22.6 %
Standard Dev. Optimum Water Content = 0.84 %
Average Dry Unit Weight = 97.7 lbf/ft3
Standard Dev. Dry Unit Weight = 1.02 lbf/ft3
The equation describing the region of acceptable test results1 for the ASTM Reference Soil CH-1
obtained in accordance with the attached protocols was determined to be:
2
2
⎛ OM − 22.6 ⎞ ⎛ DUW − 97.7 ⎞ ⎛ DUW − 97.7 ⎞
⎛ OM − 22.6 ⎞
⎟ ≤ 5.50
⎟+⎜
⎟⎜
⎟ + 0.82 ⎜
⎜
1.02
1.02
⎠
⎠ ⎝
⎝ 0.84 ⎠ ⎝
⎝ 0.84 ⎠
where: OM = optimum water content in percent; DUW = dry unit weight in lbf/ft3
_________________________________
1
The region of acceptable test results describes an area which would contain at least 90 % of the dry unit weight
versus optimum water content test values for the ASTM Reference Soil CH-1 with 95 % confidence (I. J. Hall, D. D.
Sheldon, Improved Bivariate Normal Tolerance Regions with Some Applications, Journal of Quality Technology, Vol.
11, No. 1, January 1979).
ASTM Reference Soils Program
August 1997
ASTM REFERENCE SOIL SUMMARY ANALYSIS SHEET
For
ASTM REFERENCE SOIL CL-1 & TEST METHOD D 698
(Testing Lean Clay (CL), Annapolis Clay,
Using
ASTM Test Method D 698 – 00, Method 1A, Optimum Water Content / Dry Unit
Weight; Determined by
ASTM Reference Soils & Testing Program)
DRY UNIT WEIGHT
LIMITS OF ACCEPTABLE TEST RESULTS
OPTIMUM WATER CONTENT
Average Optimum Water Content = 16.6 %
Standard Dev. Optimum Water Content = 0.53 %
Average Dry Unit Weight = 109.2 lbf/ft3
3
Standard Dev. Dry Unit Weight = 0.81 lbf/ft
The equation describing the region of acceptable test results1 for the ASTM Reference Soil CL-1 obtained
in accordance with the attached protocols was determined to be:
2
2
⎛ OM − 16.6 ⎞ ⎛ DUW − 109.2 ⎞ ⎛ DUW − 109.2 ⎞
⎛ OM − 16.6 ⎞
⎟ ≤ 4.91
⎟+⎜
⎟⎜
⎟ + 1.02 ⎜
⎜
0.81
0.81
⎠
⎠ ⎝
⎝ 0.53 ⎠ ⎝
⎝ 0.53 ⎠
where: OM = optimum water content in percent; DUW = dry unit weight in lbf/ft3
_________________________________
1
The region of acceptable test results describes an area which would contain at least 90 % of the dry unit weight
versus optimum water content test values for the ASTM Reference Soil CL-1 with 95 % confidence (I. J. Hall, D. D.
Sheldon, Improved Bivariate Normal Tolerance Regions with Some Applications, Journal of Quality Technology, Vol.
11, No. 1, January 1979).
ASTM Reference Soils Program
August 1997
ASTM REFERENCE SOIL SUMMARY ANALYSIS SHEET
For
ASTM REFERENCE SOIL ML-1 & TEST METHOD D 698
(Testing Silt (ML), Vicksburg Silt,
Using
ASTM Test Method D 698 – 00, Method 1A, Optimum Water Content / Dry Unit
Weight; Determined by
ASTM Reference Soils & Testing Program)
DRY UNIT WEIGHT
LIMITS OF ACCEPTABLE TEST RESULTS
OPTIMUM WATER CONTENT
Average Optimum Water Content = 17.0 %
Standard Dev. Optimum Water Content = 0.53 %
Average Dry Unit Weight = 106.3 lbf/ft3
Standard Dev. Dry Unit Weight = 0.64 lbf/ft3
The equation describing the region of acceptable test results1 for the ASTM Reference Soil ML-1
obtained in accordance with the attached protocols was determined to be:
2
2
⎛ OM − 17.0 ⎞ ⎛ DUW − 106.3 ⎞ ⎛ DUW − 106.3 ⎞
⎛ OM − 17.0 ⎞
⎟ ≤ 6.60
⎟+⎜
⎟⎜
⎟ + 1.02 ⎜
⎜
0.64
0.64
⎠
⎠ ⎝
⎝ 0.53 ⎠ ⎝
⎝ 0.53 ⎠
_________________________________
1
The region of acceptable test results describes an area which would contain at least 90 % of the dry unit weight
versus optimum water content test values for the ASTM Reference Soil ML-1 with 95 % confidence (I. J. Hall, D. D.
Sheldon, Improved Bivariate Normal Tolerance Regions with Some Applications, Journal of Quality Technology, Vol.
11, No. 1, January 1979).
where: OM = optimum water content in percent; DUW = dry unit weight in lbf/ft3