Results from a liquid limit test conducted on a soil are given below. Number of blows, N 12 19 27 37 Moisture content (%) 35.2 29.5 25.4 21 a. Determine the liquid limit of the soil. b. If it is known that the PI = 6.5, what would be the plastic limit of the soil? C. Determine the liquidity index of the soil if w = 23.8% in situ

Results from a liquid limit test conducted on a soil are given below. Number of blows, N 12 19 27 37 Moisture content (%) 35.2 29.5 25.4 21 a. Determine the liquid limit of the soil. b. If it is known that the PI = 6.5, what would be the plastic limit of the soil? C. Determine the liquidity index of the soil if w = 23.8% in situ

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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1. During Atterberg limit tests in the soil mechanics laboratory, the students obtained the following results from a clayey soil. Liquid limit tests: Number of Moisture blows, N content (%) 14 38.4 16 36.5 20 33.1 28 270 Plastic limit tests: Students conducted two trials and found that PL = 172% for the first trial and PL = 17.8% for the second trial. a. Draw the flow curve and obtain the liquid limit. b. What is the plasticity index of the soil? Use an average value of PL from the two plastic limit trails.
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Problem 4. A 1-m³ sample of moist soil weighs 2000 kg. The water content is 10%. Assume is 2.70 Mg/m³. With this information, fill in all blanks in the phase diagram below. V₁ = V₂ Vw Air Water- Soil M₂ Ms M₁ =
Q1/ specimen of the fine-grained soil, 75 mm in diameter and 20 mm thick was tested in an oedometer in a laboratory. At applying pressure (240 kN/m²), the time with dial gauge readings are: Time (min) 0 Settlement (mm) 0 0.25 1 0.22 0.42 4 9 0.6 0.71 16 0.79 36 64 100 0.86 0.91 1.04 d 1- Find Coefficient of consolidation in cm²/s using root time and TV90% = 0.848. Scanned by TapScanner
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A balloon-type apparatus is used to determine an in-place unit weight for a soil (field density test). The volume of the test hole determined by reading the water level graduations on the apparatus cylinder before and after digging the test hole is 0.025 ft3. The wet weight of soil obtained from the test hole is 3.10 lb. The water content is determined to be 14 percent by drying a small sample on a field stove.(a) Determine the in-place dry unit weight of the tested soil.(b) Determine the percentage of compaction for the test result from part a if the soil is part of a compacted earth fill whose maximum unit weight (from laboratory compaction tests) is 118 pcf.