A carefully-weighed 57.6 gram soil sample was dispersed for particle-size analysis using the Bouyoucos hydrometer method. The laboratory was held at a constant temperature of 20 C (68 F). The hydrometer reading after 40 seconds was 21.3 and the hydrometer reading after 8 hours was 17.0. How many grams of particles in the sample were either silt-sized or clay-sized? Your Answer: Answer units

A carefully-weighed 57.6 gram soil sample was dispersed for particle-size analysis using the Bouyoucos hydrometer method. The laboratory was held at a constant temperature of 20 C (68 F). The hydrometer reading after 40 seconds was 21.3 and the hydrometer reading after 8 hours was 17.0. How many grams of particles in the sample were either silt-sized or clay-sized? Your Answer: Answer units

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter4: Plasticity And Structure Of Soil

Section: Chapter Questions

Problem 4.8P

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A carefully-weighed 52.9 gram soil sample was dispersed for particle-size analysis using the Bouyoucos hydrometer method. The laboratory was held at a constant temperature of 20 C (68 F). The hydrometer reading after 40 seconds was 20.1 and the hydrometer reading after 8 hours was 5.1. What percentage of particles in the soil sample were clay-sized? Your Answer: Answer units
The permeability test must be carried out on a soil sample 15 cm long and 8 cm in diameter using the permeameter illustrated below. What is the difference between a variable head permeameter and a constant head permeameter?What is the disadvantage of using the constant head permeameter for all soil types? Which pemeameter is it in the illustration below? Justify your answer.How to calculate the permeability coefficient when the pressure drop is maintained at 30 cm and it takes 2 min and 35 s to collect a volume of water of 200 ml? Is it possible to identify the soil from this result? If so, what soil is it?
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A carefully-weighed 51.3 gram soil sample was dispersed for particle-size analysis using the Bouyoucos hydrometer method. The laboratory was held at a constant temperature of 20 C (68 F). For the soil to have 47 % clay-sized particles in this sample, the 8 hour hydrometer reading would have to be: Your Answer: Answer units
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Geotechnical Engineering (UPVOTE WILL BE GIVEN. PLEASE ANSWER THE QUESTION CORRECLTY. NO LONG EXPLANATION NEEDED. FOLLOW THE INSTRUCTIONS CAREFULLY.) A moist soil weighed 895 g with a volume of 425 cm3. After drying, the sample weighed 775 g. Of the dried soil, 400 g was poured into a vessel loose state. Its volume subsequently determined to be 275 cm3. That same 400 g was then vibrated and tamped to a volume of 212 cm3 with Gs = 2.71. Determine the designation of the granular soil based on its relative density. (3 decimal places - Do not round off unless it's the final answer)
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FUNDAMENTALS OF GEOTECHNICAL ANALYSIS A constant head permeability test is performed on soil that is 2 cm x 2 cm square, and 2.5cm long. The head difference applied during the test is 20 cm and 7 cm3 is collected over a time of 100 sec. Provide step by step solution. a) Compute the permeability based on these test conditions and results. b) A falling head test is conducted on the same soil specimen at the same time (t1 – t2 = 100 sec), and the standpipe diameter is 0.8 cm. If the average head during the test should be 18 cm, what are h1 and h2 values?