. Refer to Figure 7.16. What would 90% of the maxi- mum dry density equal for this curve? If the speci fications require 95% of standard Proctor density and within +2% of the optimum water content, what range of values would be acceptable for this test?

Structural Analysis
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Chapter2: Loads On Structures
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**Question 25:**

Refer to Figure 7.16. What would 90% of the maximum dry density equal for this curve? If the specifications require 95% of standard Proctor density and within ±2% of the optimum water content, what range of values would be acceptable for this test?

*Note: Since Figure 7.16 is not provided, ensure to cross-reference the relevant graph to derive precise values for the assessment described in the question.*
Transcribed Image Text:**Question 25:** Refer to Figure 7.16. What would 90% of the maximum dry density equal for this curve? If the specifications require 95% of standard Proctor density and within ±2% of the optimum water content, what range of values would be acceptable for this test? *Note: Since Figure 7.16 is not provided, ensure to cross-reference the relevant graph to derive precise values for the assessment described in the question.*
The graph illustrates the Standard Proctor compaction curve, which is used to determine the relationship between the dry unit weight (γₑ) of soil and its water content (w). The x-axis represents the water content as a percentage, ranging from 0% to 20%. The y-axis on the left denotes the dry unit weight in pounds per cubic foot (lb/ft³), while the y-axis on the right represents the void ratio (e). 

Key features of the graph:
- The curve shows a peak, indicating the maximum dry density of the soil, which is 120.5 lb/ft³.
- The optimum water content, at which this maximum dry density is achieved, is 13%.
- The void ratio decreases as the dry unit weight increases, then rises slightly after the peak.

**Figure 7.16**: Standard Proctor compaction curve.
**Note**: 62.4 lb/ft³ = 1 Mg/m³.
Transcribed Image Text:The graph illustrates the Standard Proctor compaction curve, which is used to determine the relationship between the dry unit weight (γₑ) of soil and its water content (w). The x-axis represents the water content as a percentage, ranging from 0% to 20%. The y-axis on the left denotes the dry unit weight in pounds per cubic foot (lb/ft³), while the y-axis on the right represents the void ratio (e). Key features of the graph: - The curve shows a peak, indicating the maximum dry density of the soil, which is 120.5 lb/ft³. - The optimum water content, at which this maximum dry density is achieved, is 13%. - The void ratio decreases as the dry unit weight increases, then rises slightly after the peak. **Figure 7.16**: Standard Proctor compaction curve. **Note**: 62.4 lb/ft³ = 1 Mg/m³.
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