Disturbed soil samples can be used for which of the following analyses?

• A. A) Grain-size analysis
• B. B) Specific gravity of soil solids
• C. C) Soil classification
• D. D) All of the above

Answer: (D)

Disturbed soil samples can be effectively used for grain-size analysis, specific gravity of soil solids, and soil classification.

When examining grain-size distribution, disturbed samples can provide valuable information about the general composition of the soil, allowing engineers to determine the proportions of different particle sizes present. This analysis is essential for understanding the behavior of soil and its suitability for various engineering applications.

The specific gravity of soil solids is another critical property that can be measured using disturbed samples. This value is important for calculations related to soil density, porosity, and consolidation, which are vital for the design of foundations and retaining structures.

Soil classification is a systematic method that categorizes soil based on its physical and chemical properties. With disturbed samples, engineers can accurately classify soils according to established systems like the Unified Soil Classification System or the AASHTO classification system. This classification helps in predicting soil behavior under load, drainage characteristics, and potential settlement issues.

Since disturbed soil samples are practical for all these analyses, the choice indicating that all the mentioned analyses can utilize such samples is completely justified.