Use of the Harvard Miniature Apparatus for Obtaining Moisture-Unit Weight Relationships of Soils.

摘要

This report is intended to introduce a new test procedure, 'USBR 5510, Performing Laboratory Compaction of Soils - Harvard Miniature' and present the results of a search of the literature comparing the results obtained from standard Proctor compaction with those obtained from the Harvard miniature apparatus. The compaction test was originally developed as a basis for controlling compaction in the field. It was intended as a tool to obtain a maximum unit weight that would aid in construction control; i.e., improved settlement characteristics and strength. However, some engineers have erroneously come to accept 'maximum unit weight' and 'optimum moisture content' as fixed values irrespective of the soil type or compactive effort.