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DY: Fachverband Dynamik und Statistische Physik
DY 33: Granular Matter and Granular Dynamics I
DY 33.11: Vortrag
Mittwoch, 18. März 2020, 12:30–12:45, ZEU 118
Flow study for transparent model system of concrete and cement paste — •Himanshu P Patel1 and Günter K Auernhammer1,2 — 1Leibniz-Institut für Polymerforschung Dresden e. V., Hohe Straße 6, D-01069 Dresden, Germany — 2Max Planck Institute for Polymer Research, Ackermannweg 10 - D-55128 Mainz, Germany
The study of internal dynamics in a complex granular suspension, such as flowing concrete, poses couple of scientific challenges. Concrete, being opaque, restricts the possibility of optical observations. Non-optical techniques such as Ultrasonic and slipper test provides limited understanding.
We here demonstrate the development of highly transparent model system for concrete. The system is an optically transparent dense granular suspension (42% to 48% by volume) that mimics rheology behavior of concrete on the parameters of shear stress and viscosity. Further, we analyze the flow in continuous phase using specific experimental setup. The setup allows vertical and horizontal flow analysis, to understand shear and plug flow in addition to insight about lubrication layer formation. The study is part of understating flow induced particle migration for dense granular suspensions.
The flow profile of model concrete is observed using high-speed camera and tracer particles are used to undertake the study.