Efficient mixing of bulk building materials for building structures

Abstract

The study presents an analysis of the efficiency of mixing bulk building materials used in binder-based
composites. The research focused on evaluating the impact of mixer blade geometry on the homogeneity of
the resulting mixture. Comparative experiments were conducted using traditional straight-blade and newly
patented spiral-type mixers operating at 366 rpm. The degree of homogenization was assessed through
the mass heterogeneity coefficient () for the lightest composite component. Results showed that the innovative
mixer design significantly reduced mixing time by approximately 40 seconds and improved the uniformity
of the mixture ( < 12 %) compared to conventional mixers. The findings demonstrate that blade
geometry plays a critical role in optimizing the mixing process, enhancing material consistency, and reducing
air entrainment, which contributes to improved mechanical properties of construction composites.