Apparatus for optimization of vibration parameters for heavy concretes with extreme differences in filler component densities

Abstract

Heavyweight concrete is one of essential materials for shielding against ionizing radiation; however, its compaction presents significant technological challenges due to its high bulk density and the risk of component segregation. This study focuses on the design and functional verification of a laboratory apparatus intended for investigating the influence of vibration parameters on the homogeneity of mixtures with pronounced differences in aggregate densities, specifically serpentinite and cast iron grit. The apparatus includes a prototype immersion vibrator with adjustable frequency and amplitude, a stand for stable mounting, and formwork for sample preparation. The paper presents a detailed experimental methodology, encompassing mix preparation, compaction procedures, and segregation assessment through profiling the coarse fraction along the sample height. The apparatus was successfully validated, demonstrating its capability to simulate real-world vibration compaction conditions and providing a foundation for future systematic research aimed at optimizing technological procedures for the production of heavyweight concrete structures.