Lab Compaction Characteristics Of Soil

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Lab Report #3:
Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/ft3 (600 kN-m/m3))

Soil compaction demonstrates how the soil will behave considering factors such as physical and chemical properties, moisture content, method of compaction, amount of compactive effort, and thickness of layer or “lift” being compacted when a compactive effort was added to it. This results to a compaction curve which is a plot of dry density versus moisture content. This was obtained by compacting moist soil with prescribed added amount of water in a compaction mold and getting the moisture content of a subspecimen retrieved from the center of the compacted mixture. The peak of the curve is a point showing the optimum moisture content and the maximum dry density of the soil. The results were acceptable since the R2 value of the trend line of the compaction curve is nearly 1. Soil compacted to a dense state is utilized with other engineering properties for purposes such as engineering fill.

Objectives To determine the relationship between molding water content and dry density of soils (compaction curve) compacted in a 4-in. (101.6-mm) diameter mold with a 5.50-lbf (24.5-N) rammer dropped from a height of 12.0 (305 mm) producing a compactive effort of 12,400 ft-lbf/ft3 (600 kN-m/m3). To get the optimum water content and maximum dry density from the compaction curve. Materials mold (4-in.), manual rammer, balance, drying oven, straightedge, sieve (No. 4,

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