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 unit weight of 122 Ib/cu.ft. at a
moisture content of 16%. What is the
relative density of the compacted
sub-base? Given emax = 0.85, emin =
0.42, and G, = 2.68.
%3D
Q.7
The density of a fully started specimen of
clay having a water content of 40% is 1.85
gm/cc. On even drying, the density drop
of 1.74 gm/cc. The shrinkage limit of the
specimen will be (= 1.0 am / cc)
Saturated clay has a volume of 18.9 cm^3 and a mass of 30.2 gm. On oven drying the mass reduces to 18 gm. The volume of dry specimen as determined by displacement of mercury is 9.9 cm^3. Determine the 1. shrinkage limit 2. specific gravity 3. shrinkage ratio
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 saturated sample of inorganic clay has a volume of 21.4 cm3 and weighs 36.7 g. After drying, the volume is 13.7 cm3. The weight of dry soil is 23.2 g. Determine the following: (a) Water content, (b) specific gravity, (c) void ratio, (d) saturated unit weight, (e) dry unit weight, (f) shrinkage limit.arrow_forwardA shrinkage limit test for a saturated specimen had the initial volume Vi = 21.35 cm3 and initial weight Wi = 37 gf ( = 37 × 0.00981 = 0.363 N). After drying, it became Vf = 14.3 cm3 and Wf = 26 gf (= 26 × 0.00981 = 0.255 N). Compute the shrinkage limit (SL) of this soil.arrow_forwardProblem 3 Saturated clay has a volume of 18.9 cm^3 and a mass of 30.2 gm. On oven drying the mass reduces to 18 gm. The volume of dry specimen as determined by displacement of mercury is 9.9 cm^3. Determine the 1. shrinkage limit 2. specific gravity3. shrinkage ratioarrow_forward
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- A certain saturated sand (S = 100%) has a moisture content of 25.1% and a specific gravity of solids of 2.68. It also has a maximum void ratio of 0.84 and a minimum void ratio of 0.33. Calculate its relative density and classify its consistencyarrow_forwardA certain saturated sand (S = 100,) has a moisture content of 25.1 percent and a specificgravity of solids of 2.68. It also has a maximum index void ratio of 0.84 and a minimum indexvoid ratio of 0.33. Compute its relative density and classify its consistency.arrow_forwardIn 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?arrow_forward
- A sample of uniform sand has a porosity of 43%.From the lab test, the value of the void ratio in theloosest condition is 0.85 and a void ratio of 0.35 inthe densest condition. If the water content is 12%and Gs = 2.7. Determine the following:a) Density indexb) Degree of saturationc) Determine the moist unit weightarrow_forwardA structure is built on a normally consolidated clay of thickness of H(m), where H is the last digit of your student identity number (SID). If the last digit of your SID is zero, take H = 10m. The normally consolidated clay has a natural moisture content of 45% and a Liquid limit of 50%. Ground investigation results show that the clay is overlain by a 15m layer of sand, and the ground water table is at 10m below ground level. The submerged unit weight and bulk unit weight of the sand layer are 15 kN/m³ and 20 kN/m³ respectively. The vertical stress increase at the centre of the clay layer is 100kPa due to the weight of the structure. Calculate the settlement of the structure due to primary consolidation. Take G =2.7.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 moisture content in percent.arrow_forward
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