Soil compaction happens when soil particles are pressed together, reducing pore space between them. Heavily compacted soils contain few large pores, less total pore volume, and a greater density.
In the construction of high load structures such as dams, paved roadways, and construction projects that rely on the stability of embankments; soil compaction is used to increase soil strength. Loose soil can be compacted by using mechanical equipment to remove air-voids, thereby densifying the soil and increasing its dry unit weight.
There are a variety of different benefits to soil compaction, including: prevention of soil settlement and frost damage, increased ground stability, reduced hydraulic conductivity and mitigating undesirable settlement of structures, such as paved roads, foundations and piping.
A soil compaction test measures the density of the soil. This data then informs the design of foundations. Soil compaction tests are performed on-site and are necessary to determine if the compaction density is being reached.There are several different types of field tests, each with advantages and disadvantages. A popular soil compaction test method is a dynamic cone penetration (DCP test) test.
The Global Soil Compaction Testing market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
FlatGeo Soil Compaction Test.
In order to realize the relationship between the moisture content and the compactness of soils, the compaction test is used (so called Proctor test) and its result is the compaction curve — a relationship between the dry density and its relevant moisture content.
Two important parameters should be derived from this curve: maximum dry density (denoted by MDD) and its corresponding optimum moisture content (denoted by Wopt).
The typical field soil compaction testing methods comprise using a nuclear meter, and a sand cone. Other test methods are less preferred due to their inefficiency in the field (such as a tube-density sampler or a balloon density device). Nonetheless, each of these devices produces the same result.
The standard Proctor test includes a 0.95-liter volume cylindrical mold in which the soil mass is placed and compacted in 3 layers. Each layer is compressed by dropping 25 times a 2,5 kg weight falling from an elevation of 30 centimeters.
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