A sand cone equipment is used to perform a field density test on a compacted earthfill. Weight of soil sample from the test hole is equal to 20.60N and Dry weight of soil sample is equal to 17.92N. Ottawa sand used to fill the hole weighs 16.05N and is known to have a density of 15.74kN/m3. Determine the following: (a) The moisture content of the soil (b) The in- situ dry unit weight of the soil (c) If the dry unit weight of the soil at optimum moisture content is 18.10 kN/m3, calculate the percent compaction of the earth fill.

A sand cone equipment is used to perform a field density test on a compacted earthfill. Weight of soil sample from the test hole is equal to 20.60N and Dry weight of soil sample is equal to 17.92N. Ottawa sand used to fill the hole weighs 16.05N and is known to have a density of 15.74kN/m3. Determine the following: (a) The moisture content of the soil (b) The in- situ dry unit weight of the soil (c) If the dry unit weight of the soil at optimum moisture content is 18.10 kN/m3, calculate the percent compaction of the earth fill.

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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Concept explainers

Soil Compaction Test

Soil compaction is the major area of geotechnical engineering. Soil is composed of multiple pores present on its surface, while the soil is mainly composed of gravel, sand, rocks, etc. The arrangement of these rocks and gravels is such that they build up voids (spaces) between them, which allows spaces for the roots of the plants and crops to spread and absorb the required amount of nutrients. Soil compaction is a major problem primarily caused by human activities, micro-organisms, and other multiple factors.

Question

A sand cone equipment is used to perform a field density test on a compacted earthfill. Weight of soil sample from the test
hole is equal to 20.60N and Dry weight of soil sample is equal to 17.92N. Ottawa sand used to fill the hole weighs 16.05N and is
known to have a density of 15.74KN/m3. Determine the following:
(a) The moisture content of the soil
(b) The in- situ dry unit weight of the soil
(c) If the dry unit weight of the soil at optimum moisture content is 18.10 kN/m3, calculate the percent compaction of the
earth fill.

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