Efficiency of Concrete Mixer Blades for Enhanced Cellular Lightweight Concrete Production: A Comparative Experimental Analysis
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Abstract
This research aimed at enhancing a rotary drum concrete mixer blade for cellular lightweight concrete (CLC) production. The study systematically examined the influence of blade design on critical mixing parameters, including mixing duration, compressive strength, and dry density. Experimental trials were conducted on cellular lightweight concrete specimens with varying dry density levels of 700, 800, 900, and 1,000 kg/m³, maintaining a constant water-to-cement ratio of 0.45 and a foam agent density of 47 kg/m³. A 260-liter capacity concrete mixer was powered by a 1.5-horsepower electric motor rotating at 24 revolutions per minute. A comparative analysis was performed using three distinct blade designs to evaluate their performance characteristics. The results demonstrated that the three-row blade design generated the highest shear forces during the mixing process, consequently yielding optimal compressive strength across all tested dry density ranges. This research provides valuable insights into the critical role of blade geometry in improving the mechanical properties and overall performance of cellular lightweight concrete mixtures.
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