Abstract

For earthworks (house foundation, road, ....), the degree of compaction is the basic quality factor to ensure long-term stability and economic efficiency of the project. The higher the degree of compaction, the greater the building load capacity. However, the degree of compaction of the structure depends not only on the material, but also on equipment and compaction energy. For each type of material, the degree of compaction is expressed as the ratio of the actual applied dry volumetric mass achieved to the maximum dry volumetric mass of the same soil determined by the standard compaction test. standard in the laboratory. Therefore, laboratory tests to determine the standard compaction value must be studied to suit the compaction construction technology. Standard soil compaction in the laboratory is determined based on two main compaction devices: the standard Proctor device and the improved Proctor device.

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