Void Ratio for Common Gravel & Sand

••• Nickbeer/iStock/GettyImages

In soil mechanics, the void ratio describes the relationship between the volume of voids, or spaces, in the soil or aggregate to the volume of solid constituents, or grains. Algebraically, e = Vv /Vs, where e represents the void ratio, Vv represents the volume of voids and Vs represent the volume of solid grains.

Void Ratio

The void ratio of common sand and gravel varies according to how loosely or tightly its grains are packed together. Similarly, the void ratio is proportional to the grain size.

Sand

The void ratio of sand varies according to its composition and density. Poorly graded, low density sand typically has a void ratio of about 0.8, while high density sand with angular particles typically has a void ratio about 0.4.

Gravel

Gravel typically has a void ratio about 0.4, regardless of whether it is well or poorly graded, although the void ratio can be affected by the presence of impurities, such as clay or silt. Gravel with clay has a void ratio of about 0.25, while gravel with silt can have a void ratio of 0.2 or less.

Related Articles

How to Calculate the Volume of Voids
Which Type of Sedimentary Rock Is Formed From Fragments...
Soil Types in North Carolina
How to Convert Metric Tons to Cubic Yards
How to Identify Sandstone
What Is Low Density?
Types of Loam Soil
How to Calculate Hydraulic Cylinder Tonnage
How to Calculate Voidage
How to Compare Ratios
How to Convert a Fraction to a Ratio
How to: Improper Fractions Into Proper Fractions
What Type of Soil Does Alaska Have?
How to Convert BTU to MCF
Brine Vs. Conductivity
Characteristics of Aquatic Plants
How to Calculate Density, Volume and Mass
How to Convert Cubic Yards to Tons of Rip Rap
How to Interconvert Moles, Molarity and Volume
Inorganic & Organic Components in Soil

Dont Go!

We Have More Great Sciencing Articles!