An investigation into the use of dynamic compaction for the production of adobe bricks

Avery, Edward (2014) An investigation into the use of dynamic compaction for the production of adobe bricks. MEng dissertation, University of Portsmouth.

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    The purpose of this project was determine whether or not there is a potential energy saving to be made by using a method called dynamic compaction, an alternative to quasi-static and rammed earth, to produce bricks for homes, which is suggested in other studies.
    Firstly soil was collected and after classification appropriate adjustments were made so that the soil was suitable to produce cylinders. The performance tests as well as CT scans were carried out on specimens with no chemical stabilization made using 4, 8, 16, 32, 64 and 128 blows.
    From the compressive tests is was found that only the specimens with the most compaction passed the lowest expected strengths and were comparable to the strengths for unstabilised earth tested in the literature. Tensile strength was found to be lower than the compressive strength which was also expected from the literature.
    Durability was seen to be comparable to unstabilised specimens tested in other studies and the most durable cylinders were as resistant to water as some chemically stabilised specimenstested by others.
    From the CT scanning an insight into the pressure distribution was seen a dense band on the outside was observed were smaller particles may have moved to, though this may have been caused by the scanner itself.
    The energy cost to produce the strongest and most durable specimens was significantly higher than recorded in past studies, it is because of this that there is a need for further research so that more information can be found on how dynamic compaction can be optimised to produce bricks at the lowest energy cost.

    Item Type: Dissertation
    Departments/Research Groups: Faculty of Technology > School of Civil Engineering and Surveying
    Depositing User: Beth Atkins
    Date Deposited: 16 Jan 2015 15:02
    Last Modified: 28 Jan 2015 12:47

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