What is the difference between dry density and maximum dry density of soil? It is used to calculate the compactness of soil,

Dry density refers to the density of soil under normal conditions, and the maximum dry density refers to the density of soil under the maximum degree of compaction. Generally speaking, the maximum dry density is larger than the dry density

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1. Dry density of soil
2. Conversion between dry density and wet density of soil? In the compaction test of upper soil in JTG e40-2007, dry density = wet density / (1 + 0.01 * moisture content), while in textbooks and other materials, dry density = wet density / (1 + moisture content), moisture content is a percentage, but the denominator of the two formulas is very different. Why?
3. What is the range of maximum dry density and optimum moisture content of various soil samples?
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18. The average density of alcohol with 20% water content is? (alcohol density: 0.8g / cm3)
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