There are dozens of specific tests on soil to find out its various qualities such as water content and compression characteristics. These tests help to find out the problems you might encounter during the essential foundation-laying steps of your construction project.

1. Specific Gravity

Specific gravity is a test against the density of water. That is, whether your soil will sink or swim. It’s very important to know if the soil under your house will turn to mud and float away during a flood or other major weather system.

2. Dry Density

Equally important, a test of density while dry will determine the density of your soil when dry. While sand seems to be quite dense, this dry density test is about voids or open spaces between soil particles.

Clay, for example, has very few voids when compared to sand which is generally quite porous.

3. Atterberg Limits

There are two major limits tested in this series, which determine fine-grained soils’ plastic limits, and a liquid limit test or the liquid required to fill a void. The liquid limit test uses a testing tool called the Casagrande apparatus.

The liquid limit test determines the water content required to close a gap within a specified number of blows within the Casagrande apparatus. The plasticity test involves making some clay-like strips 3mm wide until they do not break.Then moisture content is determined.

4. Proctor’s Compaction

Proctor’s compaction is a long process of getting a specific water content in the soil, compacting it to a specific volume, and testing a plug of the soil. Density will be a function of the water content once it’s plotted on a graph.

5. Moisture Content

Moisture content is a test that is performed multiple times as part of multiple tests. Though there is one that must be taken standalone without any alterations or mechanical changes to your soil, to find out the native water content. This will determine how your soil will perform in the wild, so to speak.

6. Foundation Testing

Ultimately, before you put in your footers and start pouring your concrete, you’re going to want to do last-minute foundation testing. If you don’t think it is important, wait 6-10 months until your windows and doors don’t open and close. Then the cracks form (ouch).

error: Content is protected !!
Scroll to Top