- Soil Compaction 1. A sand cone test was conducted for quality control during the compaction of a sandy clay. The data are as follows: a. b. Calibration to find dry unit weight of the standard sand Mass of Proctor mold Mass of Proctor mold and sand Volume of mold Calibration of sand cone Mass of sand cone apparatus and jar filled with sand Mass of sand cone apparatus with remaining sand in jar Sand cone test results Mass of sand cone apparatus and jar filled with sand Mass of excavated soil Mass of sand cone apparatus with remaining sand in jar Water content of excavated soil 9.2lb 12.4lb 0.0335f 12.1lb 8.3lb 16.3lb 4.9lb 8.6lb 5.9% Determine the Dry Unit Weight The Standard Proctor MDD of the sandy clay is 117.8 pcf at an OMC of 7.2%. The specficiation requires 95% Proctor dry unit weight at acceptable water contents ranging from 5% to 8.5%. Is the Specification met? Justify your answers

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Soil Compaction Test

Soil compaction is the major area of geotechnical engineering. Soil is composed of multiple pores present on its surface, while the soil is mainly composed of gravel, sand, rocks, etc. The arrangement of these rocks and gravels is such that they build up voids (spaces) between them, which allows spaces for the roots of the plants and crops to spread and absorb the required amount of nutrients. Soil compaction is a major problem primarily caused by human activities, micro-organisms, and other multiple factors.