The results of a lab compaction test using standard proctor procedure are shown in Figure 1. Determine the maximum dry unit weight and optimum moisture content (use a straight edge to show how you obtained your answers). = R= Draw an hypothetical zero-air voids curve on Figure 1. Calculate the zero-air void unit weight of the soil at the optimum moisture content. (Use Gs = 2.65). GYw 1+ wG, S If the recommended relative compaction for an earthwork in the field is 95%, what would be the minimum compacted dry unit weight and the range of acceptable moisture content for the soil in Figure 1? Ya field Yd (max),lab x100%
The results of a lab compaction test using standard proctor procedure are shown in Figure 1. Determine the maximum dry unit weight and optimum moisture content (use a straight edge to show how you obtained your answers). = R= Draw an hypothetical zero-air voids curve on Figure 1. Calculate the zero-air void unit weight of the soil at the optimum moisture content. (Use Gs = 2.65). GYw 1+ wG, S If the recommended relative compaction for an earthwork in the field is 95%, what would be the minimum compacted dry unit weight and the range of acceptable moisture content for the soil in Figure 1? Ya field Yd (max),lab x100%
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:1.
The results of a lab compaction test using standard proctor procedure are shown in
Figure 1. Determine the maximum dry unit weight and optimum moisture content (use a
straight edge to show how you obtained your answers).
Draw an hypothetical zero-air voids curve on Figure 1.
Calculate the zero-air void unit weight of the soil at the optimum moisture content.
(Use Gs = 2.65).
2.
3.
G,y
wG
1+
4.
If the recommended relative compaction for an earthwork in the field is 95 %,
what would be the minimum compacted dry unit weight and the range of acceptable moisture
content for the soil in Figure 1?
R% =
Ya(mux), lab
x100%
120
115
110
105
100
10
15
20
Moisture Content, w (%)
Figure 1: Compaction Curve
Dry Unit Weight (pcf)
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