Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 3, Problem 3.28P
To determine
Calculate the relative density of the compacted sub-base.
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In a highway project, the granular sub-base layer is compacted to a moist unitweight of 19.16 kN/m3 at a moisture content of 16%. What is the relative density of the compacted sub-base? Given: emax = 0.85, emin = 0.42, and Gs = 2.68. To improve the bearing capacity of the same sub-base,the field engineers decided to increase the relative density to 85% by additional compaction. What would be the final dry unit weight of the compacted sub-base?
A saturated soil has the following characteristics: initial volume (Vi) =19.65 cm3, final volume (Vf) =13.5 cm3, mass of wet soil (Ml) = 36 g, and mass of dry soil (M2) =25 g. Determine the shrinkage limit and the shrinkage ratio.
An undisturbed specimen of soil has a volume of 300 cm3 and weighs 498 g. After over drying for 24 hours, its weight is reduced to 456 g. Assume G= 2.70 . Determine the porosity in percent.
Chapter 3 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - Prob. 3.4PCh. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10P
Ch. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - Prob. 3.13PCh. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Prob. 3.16PCh. 3 - Prob. 3.17PCh. 3 - Prob. 3.18PCh. 3 - Prob. 3.19PCh. 3 - Prob. 3.20PCh. 3 - Prob. 3.21PCh. 3 - Prob. 3.22PCh. 3 - Prob. 3.23PCh. 3 - Prob. 3.24PCh. 3 - For a given sandy soil, emax = 0.75 and emin =...Ch. 3 - For a given sandy soil, the maximum and minimum...Ch. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - Prob. 3.29PCh. 3 - Prob. 3.1CTPCh. 3 - Prob. 3.2CTPCh. 3 - Prob. 3.3CTP
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- A soil has a dry density of 1600 kg/cu.m and a void ratio of 0.63. Compute the saturated density of the soil.arrow_forwardIn an undisturbed soil formation, it is known that the dry unit weight is 18.06 kN/m3. The specific gravity of the soil particles is 2.75. (a) What is the saturated wet unit weight of the soil, in kN/m3 and pcf? (b) What is the submerged effective weight of the soil, in kN/m3 and pcf? (c) What is the submerged effective density (Mg/m3)?arrow_forwardIn its natural state, a moist soil has a volume of 0.33 ft3 and weighs 39.93 lb. The oven-dried weight of the soil is 34.54 lb. If Gs=2.67, calculatea) Moisture content (%) b) Moist unit weight (lb/ft3)c) Dry unit weight (lb/ft3) d) Void ratio, ee) Porosity, n f) Degree of saturation, S (%)arrow_forward
- In its natural state, a moist soil has a volume of 0.33 ft3 and weighs 39.93 lb.The oven-dry weight of the soil is 34.54 lb. If Gs = 2.67, calculate the moisturecontent, moist unit weight, dry unit weight, void ratio, porosity, and degree of saturation.arrow_forwardA compacted soil with a wet density of 18.50 kN/m3 has 97% of its pore spaces filled with water at a moisture content of 29.50%. What is the specific gravity of the soil solids? Determine also the porosity and void ratio.arrow_forwardA 3 layer soil has the following properties from top to bottom. Obtain the equivalent vertical coefficienct of permeability, in cm/sec, round off to 7 decimal places, and obtain the equivalent horizontal coefficient of permeability, in cm/sec, round off to 5 decimal places.arrow_forward
- For a given soil, the following are known: Gs = 2.74, moist unit weight is 20.6 kN/m3, and moisture content is 6%. Determine: Dry unit weight Void ratio Porosity Degree of saturationarrow_forwardWhat are the degree of consolidation of soil and the average degree of consolidation of soil layerarrow_forwardIf a saturated layer has a unit weight of 125 pcf, what is the submerged unit weight?What is the degree of consolidation of the abovementioned soil?arrow_forward
- The following technical data are given below: Overburden pressure = 180KPa Increase in pressure = 140KPa Clay thickness = 8m Compression Index = 0.315 Void ratio = 1.132 What is the total settlement in clay?arrow_forwardAn undisturbed sample of saturated clay has a volume of 16.5 cm3 and weighs 35.1 g. On oven drying, the weight of the sample reduces to 29.5 g. Determine the saturated density in kN/m3arrow_forwardA bed of sand consists of three horizontal layers of equal thickness. The value of k for the upper and lower layers is 1x10-4 m/s. What is the ratio of the average permeability of the bed in the horizontal direction to that in the vertical direction?arrow_forward
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