18. Effect on Swell Shrink aspect
The chapter discusses the effects of compaction on soil shrinkage and swelling, emphasizing that compacted dry soil exhibits greater swelling than wet soil. It provides an overview of the Standard Proctor’s Compaction Test, detailing the apparatus needed and the step-by-step procedure to determine optimal moisture content for soil compaction, and introduces the Modified Compaction Test developed for better compaction in field applications.
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What we have learnt
- Compaction significantly reduces void space, which decreases the swelling and shrinkage of soil.
- The Standard Proctor’s Compaction Test is a critical method for determining the optimal moisture content for soil.
- The Modified Compaction Test is essential for achieving higher compaction levels necessary for heavy infrastructure.
Key Concepts
- -- Soil Compaction
- The process of densifying soil to reduce the void space, thereby enhancing its load-bearing capacity.
- -- Standard Proctor’s Compaction Test
- A laboratory test to determine the optimal moisture content and maximum dry density of soil.
- -- Modified Compaction Test
- An adaptation of the Proctor test used for soils that need to support heavier loads, such as airfields.
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