Specific Weight of Dry Sand Grains for Concentration of Soil in Volumetric Basis Calculator

Formula Used:

\[ \gamma_g = \frac{(\gamma_m - \gamma_w)}{C_v} + \gamma_w \]

Specific Weight of the Mixture (γm):

N/m³

Specific Weight of Water (γw):

N/m³

Concentration of Soil in the Mixture (Cv):

m³

Specific Weight of Dry Sand Grains (γg):

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1. What is Specific Weight of Dry Sand Grains?

Specific Weight of Dry Sand Grains refers to the weight per unit volume of the sand particles when they are dry and compacted, excluding any void spaces or water content. It is an important parameter in geotechnical engineering and coastal sediment studies.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ \gamma_g = \frac{(\gamma_m - \gamma_w)}{C_v} + \gamma_w \]

Where:

\( \gamma_g \) — Specific Weight of Dry Sand Grains (N/m³)
\( \gamma_m \) — Specific Weight of the Mixture (N/m³)
\( \gamma_w \) — Specific Weight of Water (N/m³)
\( C_v \) — Concentration of Soil in the Mixture (m³)

Explanation: The formula calculates the specific weight of dry sand grains by accounting for the mixture's specific weight, water's specific weight, and the volumetric concentration of soil in the mixture.

3. Importance of Specific Weight Calculation

Details: Accurate calculation of specific weight of dry sand grains is crucial for understanding sediment transport, designing coastal structures, and analyzing soil stability in geotechnical applications.

4. Using the Calculator

Tips: Enter specific weight of the mixture and water in N/m³, and concentration of soil in m³. All values must be valid (positive values, concentration between 0-1).

5. Frequently Asked Questions (FAQ)

Q1: What is the typical range for specific weight of dry sand grains?
A: The specific weight of dry sand grains typically ranges between 25,000-27,000 N/m³, depending on the mineral composition and packing density.

Q2: How does this differ from bulk density?
A: Specific weight of dry sand grains excludes void spaces, while bulk density includes the voids between particles in the measurement.

Q3: Why is water's specific weight important in this calculation?
A: Water's specific weight provides the baseline reference for buoyancy effects and helps isolate the solid particle contribution in the mixture.

Q4: What factors affect the concentration of soil in the mixture?
A: Soil concentration depends on sediment type, water flow velocity, settling characteristics, and mixing conditions in the environment.

Q5: Can this formula be used for other types of soil besides sand?
A: While primarily designed for sand, the formula can be applied to other granular materials, though specific weight values may vary significantly.