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Dear expert members, So far I understand ..... For hydrometer testing, pH of the soil should be measured to know wheather it is alkaline or acidic soil. If the soil is acidic then dispersing agent should be alkaline, and vice versa. But how to select the concentration of the dispersing solution...

What type of dispersion agent (acidic or alkaline) should be used for what type of soil? How the density of the dispersing solution is selected?

We also use Proctor device. If the moisture content is high the highly plastic soil becomes sticky. During compaction the soil adhere with the compaction rammer, it resist the free fall of the rammer.

what is the best/suitable way to compact highly plastic soil in the laboratory? Compaction and trimming ..both are difficult.

Thanks

Experts are requested to describe the effect of index properties (Atterberg's limits, %clay, %silt, %sand, etc.) of soil on Failure plane (inclination/nature) in case of unconfined compression test. What should be the side-slope of a road in filling (embankment)? Is there any relationship...