Engineering

How to Calculate and Solve for Relative Compaction | Soil Mechanics and Foundation

Last Updated on September 28, 2020

The image above represents relative compaction.

To compute for relative compaction, two essential parameters are needed and these parameters are Field dry density (ρd fieldand Maximum dry density (ρd max).

The formula for calculating relative compaction:

Rc = ρd field / ρd max

Where:

Rc = Relative Compaction
ρd field = Field Dry Density
ρd max = Maximum Dry Density

Let’s solve an example;
Find the relative compaction when the field dry density is 44 and the maximum dry density is 11.

This implies that;

ρd field = Field Dry Density = 44
ρd max = Maximum Dry Density = 11

Rc = ρd field / ρd max
Rc = 44 / 11
Rc = 4

Therefore, the relative compaction is 4.

Calculating for the Field Dry Density when the Relative Compaction and the Maximum Dry Density is Given.

ρd field = Rc x ρd max

Where;

ρd field = Field Dry Density
Rc = Relative Compaction
ρd max = Maximum Dry Density

Let’s solve an example;
Find the field dry density when the relative compaction is 25 and the maximum dry density is 4.

This implies that;

Rc = Relative Compaction = 25
ρd max = Maximum Dry Density = 4

ρd field = Rc x ρd max
ρd field = 25 x 4
ρd field = 100

Therefore, the field dry density is 100.

Calculating for the Maximum Dry Density when the Relative Compaction and the Field Dry Density is Given.

ρd max = ρd field / Rc

Where;

ρd max = Maximum Dry Density
Rc = Relative Compaction
ρd field = Field Dry Density

Let’s solve an example;
Find the maximum dry density when the relative compaction is 10 and the field dry density is 40.

This implies that;

Rc = Relative Compaction = 10
ρd field = Field Dry Density = 40

ρd max = ρd field / Rc
ρd max = 40 / 10>
ρd max = 4

Therefore, the maximum dry density is 4.

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the relative compaction.

To get the answer and workings of the relative compaction using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

Web – https://www.nickzom.org/calculator-plus

To get access to the professional version via web, you need to register and subscribe for NGN 2,000 per annum to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Agricultural under Engineering.

Now, Click on Soil Mechanics and Foundation under Agricultural

Now, Click on Relative Compaction under Soil Mechanics and Foundation

The screenshot below displays the page or activity to enter your values, to get the answer for the relative compaction according to the respective parameters which is the Field dry density (ρd fieldand Maximum dry density (ρd max).

Now, enter the values appropriately and accordingly for the parameters as required by the Field dry density (ρd fieldis 44and Maximum dry density (ρd max) is 11.

Finally, Click on Calculate

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the relative compaction and presents the formula, workings and steps too.

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