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In concrete work, Fuller and Thompson (1907) suggested that a dense packing of grains can be achieved if the percent finer ( p ) and grain size ( D ) are related by the following equation, where n is a constant varying in the range of 0.3-0.6. D max is the size of the largest grain within the soil. p = ( D D max ) n × 100 This equation is sometimes used in roadwork for selecting the aggregates. a. For n = 0.5, show that the soil is well graded. b. If n = 0.5 and D max = 19.0 mm, find the percentages of gravel, sand, and fines within the soil. Use the Unified Soil Classification System.

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Fundamentals of Geotechnical Engin...

5th Edition
Braja M. Das + 1 other
Publisher: Cengage Learning
ISBN: 9781305635180
BuyFind

Fundamentals of Geotechnical Engin...

5th Edition
Braja M. Das + 1 other
Publisher: Cengage Learning
ISBN: 9781305635180

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Chapter
Section
Chapter 2, Problem 2.15CTP
Textbook Problem

In concrete work, Fuller and Thompson (1907) suggested that a dense packing of grains can be achieved if the percent finer (p) and grain size (D) are related by the following equation, where n is a constant varying in the range of 0.3-0.6. Dmax is the size of the largest grain within the soil.

p = ( D D max ) n × 100

This equation is sometimes used in roadwork for selecting the aggregates.

  1. a. For n = 0.5, show that the soil is well graded.
  2. b. If n = 0.5 and Dmax = 19.0 mm, find the percentages of gravel, sand, and fines within the soil. Use the Unified Soil Classification System.

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