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- W1579804599 abstract "Introduction: Current Moisture Density Relationship (MDR) tests use a manual method ofcompaction that is physically arduous and subject to some technical problems.This project aims to use a vibratory method of compaction using an electricjackhammer to address these problems.Background: The MDR test is used to establish the Maximum Dry Density (MDD) and theOptimum Moisture Content (OMC) of coherent constriction materials forembankments, footings and pavements. This result is compared to the result of afield density test to find the relative density for quality control of constructionprojects.Methodology: A 1240 W electric jackhammer with a flat compaction plate was to supplycompaction energy to the sample. The jackhammer was initially used hand heldto find the compaction characteristics of the jackhammer then an apparatus wasdesigned and built to hold the jackhammer during operation. Comparison wasmade between the results from Queensland Main Roads test method Q110A andthe project results. Testing consisted of 4 test series exploring the relationshipsbetween:- The time of compaction and maximum dry density.- The reciprocating mass of the electric jackhammer and maximum drydensity.- Standard deviation, spread of results, average maximum dry density andoptimum moisture content between the project method and test methodQ110A.- The performance of the project method as applied to different soil types.Conclusions: The project results suggest that a vibratory method of compaction may be asolution to some of the technical and ergonomic problems associated withmanual compaction methods. More tests are needed to validate the method." @default.
- W1579804599 created "2016-06-24" @default.
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- W1579804599 date "2005-10-01" @default.
- W1579804599 modified "2023-09-24" @default.
- W1579804599 title "Comparison of moisture density relationship tests in civil engineering materials" @default.
- W1579804599 hasPublicationYear "2005" @default.
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