Questions from Geotechnical Engineering

Q: 9% of a soil is retained on No. 4 sieve

9% of a soil is retained on No. 4 sieve, and 11% passes the No. 200 sieve. It is also known that 10%, 30%, and 60% of the soil is smaller than 0.1 mm, 0.8 mm, and 1.9 mm, respectively. When Atterberg...

Q: The grain-size characteristics are given in the following table.

The grain-size characteristics are given in the following table. Draw the grain-size distribution curve. Determine the percentages of gravel, sand, silt, and clay: According to the USDA system Accordi...

Q: Given Gs = 2.75, calculate the zero-air

Given Gs = 2.75, calculate the zero-air-void unit weight in lb/ft3 for a soil at w = 5%, 8%, 10%, 12%, and 15%.

Q: Repeat Problem 6.9 using Matteo’s (2009) method.

Repeat Problem 6.9 using Matteo’s (2009) method.

Q: The maximum and minimum dry unit weights of a sand were determined

The maximum and minimum dry unit weights of a sand were determined in the laboratory to be 104 lb/ft3 and 93 lb/ft3, respectively. What would be the relative compaction in the field if the relative de...

Q: The maximum and minimum dry densities of a sand were determined in

The maximum and minimum dry densities of a sand were determined in the laboratory to be 1682 kg/m3 and 1510 kg/m3, respectively. In the field, if the relative density of compaction of the same sand is...

Q: The relative compaction of a sand in the field is 90%.

The relative compaction of a sand in the field is 90%. The maximum and minimum dry unit weights of the sand are 108 lb/ft3 and 93 lb/ft3, respectively. For the field conditions, determine: Dry unit...

Q: Following are the results of a field unit weight determination test on

Following are the results of a field unit weight determination test on a soil using the sand cone method. Calibrated dry density of Ottawa sand = 1667 kg /m3 Calibrated mass of Ottawa sand to fill the...

Q: The backfill material for a vibroflotation project has the following grain sizes

The backfill material for a vibroflotation project has the following grain sizes. D10 = 0.11 mm D20 = 0.19 mm D50 = 1.3 mm

Q: Repeat Problem 6.1= with the following values.

Repeat Problem 6.1= with the following values. D10 = 0.09 mm D20 = 0.2= mm D50 = 0.61 mm