Abstract:

A nonstandard Proctor test was conducted on the monolayer cohesive soil to study the relationship among the density, compacting work the water content. Shear strengths of the compacted soil samples were further measured. It is shown that under lower compacting work, the compacting density increased with the increase of the water content; following a linear trend and no peak density being found in the tested range of moisture content. The moisture content for the density peak and that for the shear strength peak were separated by a gap, of which magnitude is in the range of 3.4% to 5.7% in this experiment. The rule of the reduced internal friction angle with the increased moisture content was also found to be valid for certain impacting work. Peak value appeared in the curve of the internal friction angle for lower compacting work; but the curve was replaced by linear trend when the compacting work was increased. Another focus of the experiment was on the problems of remolded soil for indoor model test. Based on the experimental data, the optimum parameters for preparing remolded soil was proposed; and an evaluating index ? was given tentatively.

Key words: compaction work, moisture content, shear strength, remolded soil