UHPC is an ultra-high-strength cement-based material with high strength, high toughness, and low porosity. A batch feeding and batch mixing process is generally adopted in a uhpc mixer, with mixing method and time as the core factors that determine the performance of the mixing equipment.
Problems that May Occur During UHPC Mixing Equipment
Up to now, the following main problems still exist in the operation of the uhpc mixing equipment (uhpc mixer):
Unreasonable feeding methods that disrupt the efficiency of the countercurrent mixer and lead to uneven material distribution.
Poor and insufficient mixing of powder materials due to internal cohesion effect in the uhpc mixer, which tends to cause agglomeration. In other words, powder materials are difficult to be completely dispersed and participate in silicification and pozzolanic hydration reactions, forming a number of "fish eyes" in the mixture processed by the mixing equipment.
Therefore, extending the mixing time is generally used to compensate in the uhpc mixing equipment, but it may not be effective and wastes materials. However, excessive mixing time leads to over-mixing in the countercurrent mixer, which damages the shape and structure of fine-grained materials, even destroys their activity and the plasticity and fluidity of concrete, while also reducing efficiency and increasing energy consumption ratio of the uhpc mixer.
Ninon CSM Countercurrent Mixer Solves Your Problems
The principle of the Ninon countercurrent mixer is mainly applied to high-shear continuous mixing and granulation for UHPC production. The mixing process of this uhpc mixer is designed with 3D countercurrent variable-speed mixing technology (high-speed blades with adjustable angles for shearing, breaking and grinding materials + low-speed pear-shaped blades for turning over materials + reverse tumbling of the mixing pan), which is a core advantage of the mixing equipment.
UHPC Mixing Equipment for Premix + Steel Fibers
For small amounts of powder and liquid, the uhpc mixer adopts vortex-type high-shear dispersion premixing technology (for powder-powder or powder-liquid mixing). After mixing, the uhpc mixer uses pressure jetting to remix with dry materials, and applies variable-speed mixing technology (multiple variable-speed combination technology throughout the entire mixing cycle) to ensure optimal results for the uhpc mixing equipment.
This countercurrent mixer design can improve mixing uniformity and full mixing of powder materials, shorten mixing time, eliminate agglomeration, reduce material waste, and enhance mixing and granulation performance of the mixing equipment. The uhpc mixer fully adopts frequency conversion control technology, and the uhpc mixer is equipped with devices for detecting stirring power, mixture temperature, and slump, enabling a certain degree of intelligent production for the uhpc mixing equipment.