Estimating a Proctor Density Curve
نویسنده
چکیده
Tillage studies have shown that maximum, tillage-induced, aggregate breakdown occurs near the optimum water content on a Proctor compaction curve for the soil. Many soil databases do not contain Proctor data; therefore, prediction equations were developed to estimate the optimum water content, peak Proctor dry bulk density, and the Proctor compaction curve for a soil based on common intrinsic properties (sand, silt, clay, and organic matter) from 39 soil samples. A good relationship was obtained between soil intrinsic properties and the optimum water content with an adjusted R^ value of 0.86. The shape of the Proctor compaction curve was estimated using two lines intersecting at the Proctor optimum water content/peak density point. An overall adjusted R^ value of 0.72 was obtained for the predicted versus measured values of the Proctor dry density for the entire Proctor compaction curve.
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