Influence of admixture on 3D printable construction material
The rheological aspect of conventional casting application is as crucial as it is for JD concrete printing. In extrusion-based 3D printing method, the material should exhibit thixotropic behavior, where the material is required to be low in viscosity during pumping and high in viscosity after ext...
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| Main Authors: | , |
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| Other Authors: | |
| Format: | Conference or Workshop Item |
| Language: | English |
| Published: |
2020
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/143783 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | The rheological aspect of conventional casting application is as crucial as it is for JD
concrete printing. In extrusion-based 3D printing method, the material should exhibit
thixotropic behavior, where the material is required to be low in viscosity during pumping and
high in viscosity after extrusion so that the material maintains its shape after extrusion. This
change in viscosity can be achieved by the addition of admixtures. In this paper, oscillation
tests were used to analyz.e the rheology for different mix design. In the early stage of the
oscillation test, the stress is sufficiently low to preserve the structure which simulates the
material at rest. As the test progresses, the incrementing speed of the probe in the rheometer
will tend to cause disruption in the structure which mimics the flow of the marerial. The use
of oscillatory test helps to identify the nature of the s1J'uctur:ing mechanisms present in the
material which is useful when attempting in understanding the flow behavior of the material. |
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