Use of Magnetic Field to Rotate Iron Filings in Sand as Means of Soil Improvement
Publication: Geo-Congress 2023
ABSTRACT
The use of recycled materials such as iron filings in soil improvement has become a growing interest due to the improved sustainability and decreased cost over the use of new materials. Currently, materials are mixed with soil or pressure injected to create chemical reactions (i.e., bio-remediated or lime-treated soils); however, there is little control over the resulting soil fabric. Magnetic fields have been used to align single-wall carbon nanotubes and graphene to create membranes and films and to reinforce synthetic composites, however, have not been previously used in soil improvement. This research investigated the effect of mixing ferrous particles (iron filings) in sand and using a magnetic field to rotate the particles to resist loads by increasing the soil strength. A series of consolidated drained triaxial compression tests were conducted to investigate the sand-particle mixtures by controlling the magnetic particle orientation. Two different relative densities (50% and 70%), two particle concentrations (5% and 7%), and five magnetic field strengths were used to create the iron filing particle mixture specimens. Results indicated that the 7% iron filing particles reinforced sand specimen prepared at 50% relative density had a strength increased by 25.1% compared to the non-rotated/randomly distributed iron filing particle reinforced sand specimens.
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Geo-Congress 2023
Pages: 490 - 499
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Published online: Mar 23, 2023
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