Title: Concrete Dumping Height Specification
Author(s): Cristian Masana
Publication: Concrete International
Appears on pages(s): 40-42
Keywords: casting; free fall; honeycomb; performance specification; placement
If the dumping height is too large for the construction procedures, mixture, and reinforcement congestion, the most evident defects are honeycombs. To provide a tool to define an acceptable dumping height that will assure that the amount of honeycombing is within a permissible limit, the Concrete Casting Committee of the Instituto del Cemento y del Hormigón de Chile (ICH) developed Technical Specification ET 002-05, “Dumping Height of Concrete when Casting Vertical Elements.” This performance specification allows greater dumping heights that can lead to greater productivity without compromising the quality of the product.