The results of standard and modified Proctor tests, along with interpretation for the curves, are given in the image below for a sandy soil being considered from a potential borrow pit for a project.Using the interpreted curve, what is the maximum dry unit weight (in pcf) of the soil for the modified Proctor test results?what is the optimum water content of the soil (in percent) for the modified Proctor test results? **Transcription for an Educational Website:**---### Soil Compaction AnalysisThis graph presents the relationship between water content (%) and dry unit weight (pcf) for various soil samples collected and tested in Fall 2018. The graph uses different symbols to represent the days and testing conditions:- **Tues std.** (Tuesday standard): Red circles- **Wed std.** (Wednesday standard): Blue circles- **Thurs std.** (Thursday standard): Blue triangles- **Tues mod.** (Tuesday modified): Red triangles- **Wed mod.** (Wednesday modified): Red inverted triangles- **Thurs mod.** (Thursday modified): Blue inverted triangles### Key Components of the Graph:- **Standard Compaction Curve**: Illustrated using a line passing through the standard day test data.- **Modified Compaction Curve**: Shown using another line passing through the modified day test data.- The **Zero Air Voids (ZAV) Line**: A solid line that indicates the point beyond which no air voids are present.- The **Line of Optimum**: A dashed line demonstrating the ideal water content at which maximum dry unit weight is achieved.### Important Values:- **Standard Conditions**: - Maximum Dry Unit Weight (\( \gamma_{dmax} \)): 128.5 pcf - Optimum Water Content (\( w_{opt} \)): 8.0%- **Modified Conditions**: - Maximum Dry Unit Weight (\( \gamma_{dmax} \)): 121.0 pcf - Optimum Water Content (\( w_{opt} \)): 10.5%### Saturation Line:- The line marked as **S=93%** shows the level of saturation in the soil sample.This comprehensive data helps in understanding the compaction characteristics of soil under varying conditions and can guide effective soil management practices.---

Answered: The results of standard and modified…

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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The results of standard and modified Proctor tests, along with interpretation for the curves, are given in the image below for a sandy soil being considered from a potential borrow pit for a project.

Using the interpreted curve, what is the maximum dry unit weight (in pcf) of the soil for the modified Proctor test results?

what is the optimum water content of the soil (in percent) for the modified Proctor test results?

**Transcription for an Educational Website:**

---

### Soil Compaction Analysis

This graph presents the relationship between water content (%) and dry unit weight (pcf) for various soil samples collected and tested in Fall 2018. The graph uses different symbols to represent the days and testing conditions:

- **Tues std.** (Tuesday standard): Red circles
- **Wed std.** (Wednesday standard): Blue circles
- **Thurs std.** (Thursday standard): Blue triangles
- **Tues mod.** (Tuesday modified): Red triangles
- **Wed mod.** (Wednesday modified): Red inverted triangles
- **Thurs mod.** (Thursday modified): Blue inverted triangles

### Key Components of the Graph:

- **Standard Compaction Curve**: Illustrated using a line passing through the standard day test data.
- **Modified Compaction Curve**: Shown using another line passing through the modified day test data.
- The **Zero Air Voids (ZAV) Line**: A solid line that indicates the point beyond which no air voids are present.
- The **Line of Optimum**: A dashed line demonstrating the ideal water content at which maximum dry unit weight is achieved.

### Important Values:

- **Standard Conditions**:
- Maximum Dry Unit Weight (\( \gamma_{dmax} \)): 128.5 pcf
- Optimum Water Content (\( w_{opt} \)): 8.0%

- **Modified Conditions**:
- Maximum Dry Unit Weight (\( \gamma_{dmax} \)): 121.0 pcf
- Optimum Water Content (\( w_{opt} \)): 10.5%

### Saturation Line:

- The line marked as **S=93%** shows the level of saturation in the soil sample.

This comprehensive data helps in understanding the compaction characteristics of soil under varying conditions and can guide effective soil management practices.

---

Expert Solution

Step 1

The upper curve is of modified proctor test while the similar lower curve is of standard proctor test. In the chart the mentioned value of dry unit weight and optimum moisture content are given wrong. Infact the values are correct but value of standard proctor test is shown in modified proctor test and vice versa... Remember always modified proctor test give higher dry unit weight and lower optimum moisture content than standard proctor test