A proctor test was performed on a soil with a specific gravity of solids, G_s =

Question

A proctor test was performed on a soil with a specific gravity of solids, G_s = 2.70, producing the results shown below. Specifications call for 95% relative compaction. Find (1) the optimum moisture content, (2) the maximum dry weight, (3) the range in permissible water content for compaction on the dry side, and (4) the range in saturation corresponding to the permissible water contents. optimum moisture content = 189 Maximum dry unit weight 106 Range in water content 18 to 24% Range in saturation 72 to 93%

Explanation / Answer

range in water content for compaction on dry side of OMC will be found as

draw a line parallel to x axis through dry unit weight of 100.7

from the intersection of this line on graph, draw line perpendicular on x axis

read the moisture content value which comes around 15.2

so range is (15.2 to 18)

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