AUTHOR=Kumar Aditya , Lewis Peter , Balonis Magdalena , Di Carlo Dino , Sant Gaurav TITLE=On the Application of Inertial Microfluidics for the Size-Based Separation of Polydisperse Cementitious Particulates JOURNAL=Frontiers in Materials VOLUME=2 YEAR=2015 URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2015.00048 DOI=10.3389/fmats.2015.00048 ISSN=2296-8016 ABSTRACT=
The early-age performance of concrete is determined by the properties of its cementitious binder and the evolution of its chemical reactions. The chemical reactivity, and to some extent, the composition of cementitious particles can depend on particle size. Therefore, it is valuable to physically separate cementing minerals into well-defined size classes so that the influences of both particle size and composition on reaction progress can be studied without the confounding effects of a broad particle size distribution. However, conventional particle separation methods (e.g., density fractionation, wet sieving, field-flow extraction, ultrasonification–sedimentation) are time consuming and cumbersome and result in poor particle yields (PY) and size-selectivity, thus, making them unsuitable for processing large(r) volumes of cementitious powders (on the order of grams). This study applies a novel inertial microfluidics (IMF) based procedure to separate cementitious powders on the basis of their size. Special attention is paid to optimizing operating variables to ensure that particles in a fluid streamline achieve