This included the development of test methods to predict lateral pressure exerted by SCC and field tests to assess rheological properties of SCC.
The study investigated the role of material constituents, casting characteristics, and formwork geometry on SCC form pressure.
Microstructure Related Durability of Cementitious Composites 3rd International RILEM Conference, proceedings pro117.
Fresh Concrete International RILEM Conference Materials Systems and Structures in Civil Engineering 2016 (MSSCE 2016), proceedings pro115.
Six field-oriented tests were developed to evaluate structural build-up at rest (thixotropy) of concrete, which significantly affects lateral pressure characteristics.
Among these tests, the portable vane (PV) and inclined plane (IP) tests showed good repeatability, low relative error, and comparable results to measurements obtained from concrete rheometer. Variations of static yield stress at rest with time The PV test consists of four sets: each has cross-shaped vane that is centered vertically in square container before filling the container with concrete up to the total vane’s height.
One of these challenges concerns the formwork pressure exerted by SCC.
A major advantage of SCC is the accelerated casting process due to the elimination of external vibration.
It can be placed faster, and needs no mechanical vibration.
The device is equipped with two flush-mounted pressure sensors.
It is filled with 0.5 m of concrete at given rate, and then air pressure is introduced, at the same rate, to simulate pressure increase up to 13 m.
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The research presented in this manuscript was carried out at the Center for Advanced Cement-Based Materials at Northwestern University and the Universidad Complutense de Madrid.