Scholarly record
UTILIZATION OF FUSION DEPOSITION MODELLING FOR REINFORCING OF COHESIONLESS SOIL
Abstract
Fibre-reinforcing is an efficient method to improve the mechanical properties of a wide range of materials including soils. A drawback of currently used fibres, given by methods of production, is their uniform cross-section, planar shape and a smooth surface in most cases having an adverse effect on the pull-out capacity of fibres. The proposed paper presents an initial experience with the fabrication of fibres and testing of cohesionless soils improved in this way. The commercially available 3D printer was used and different shapes of fibres were prepared. The better interaction between soil and fibres can be achieved by using various shapes of fibres. The first set of fibres shapes was inspired by steel fibres used in the fibre reinforced concrete. The second set of fibres shape was designed by the authors of the article. The choice of the suitable base material was an important task. Furthermore, its durability to use in soil, as well as suitability for the 3D printing, was important. Optimization of the printing process as printing temperature, cooling and other settings had to be done to produce the fibres at the desired quality. Testing of mechanical properties was carried out in the triaxial apparatus as a consolidated drained test. Conducted laboratory tests of mechanical properties revealed a significant increase in shear strength of composite soil and decrease in brittleness. The pulling-out of the fibres was observed as the main failure mechanism of the composite testing in this study.
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References7
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