Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 5, Problem 5.2P
To determine
Find how much water should be added to raise the moisture content to 16.0%.
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Fundamentals of Geotechnical Engineering (MindTap Course List)
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- The results of a standard Proctor test are given in the following table. Determine the maximum dry unit weight of compaction and the optimum moisture content. Also determine the moisture content required to achieve 90% of ꙋd (max).arrow_forwardDetermine the density index of a soil having a natural void ratio 0.7. The void ratio of the soil in the loosest and most dense state is 0.85 and 0.4 respectively. Also, calculate the relative compaction.arrow_forwardIt has been anticipated that the soil under the proposed dam is contaminated, and needs to be removed and backfilled to a depth of 2.5 feet. A Standard Proctor compaction test was conducted on soil from a borrow pit, with the results shown below right. Based on the results: a) Plot the Proctor curve for the borrow soil. b) Find the optimum water content and max. dry unit weight for the borrow soil. c) Determine whether the unit weight of the top layer can be met by compacting to 95% of maximum, and what the range of moisture content for that unit weight is. d) If we borrow soil from a pit with a void ratio of 0.71, determine how much soil we need to borrow to backfill below the dam to match the in-situ void ratio of the top layer of soil.arrow_forward
- 1. Draw the compaction curve using the following given data from a standard Proctor test. 2. From the compaction curve you drawn, determine the Optimum Moisture Content and the Maximum Dry Unit Weight.arrow_forwardA fresh soil sample with a mass of 460 g is collected from the field using a cylinder with diameter of 7.5 cm and height of 7.3 cm. After oven-drying, the soil mass becomes 370 g. What is the apparent specific gravity?arrow_forwardA soil specimen having a volume of 0.012 m3 has a specific gravity of 2.60. It has a moist mass of 20.6 kg and a dried mass of 16.1 kg. Compute its void ratio.arrow_forward
- Plot the moisture density curve and determine the maximum dry unit weight of compaction and the optimum moisture content.arrow_forwardFor a granular soil, the following are given:●● Gs = 2.6●● Liquid limit on the fraction passing No. 40 sieve 5 20●● Percent retained on No. 4 sieve 5 20 Using Eqs. (5.4) and (5.5) attached , estimate the maximum dry density of compaction and the optimum moisture content based on the modified Proctor test.arrow_forwarddetermine the density index of a soil having a natural void ratio 0.7. The void ratio of the soil in the loosest and most dense state is 0.85 and 0.4 respectively.Also calculate relative compaction.arrow_forward
- A soil sample has a unit weight of 1.9 g/cc and w=12%. If Gs of solids is 2.65, determine the degree of saturation and porosity in percent.arrow_forwardFor cohesive soil fill, what is the relationship between dry density and moisture content in the proctor (soil compaction) test?arrow_forwardAssuming the fill soil does not change properties, how can the compated soil density exceed 100% standard proctor? a) Increased compaction energy b)Increased Strength c) Increased Plasticity Index d) Decreased permeabilityarrow_forward
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