Experimental Study on a Barite Heavyweight Self-Consolidating Concrete

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Experimental Study on a Barite Heavyweight Self-Consolidating Concrete

Author(s): D. Revuelta, M.C. Alonso, J.L. García, and A. Barona

Publication: Special Publication

Volume: 261

Issue:

Appears on pages(s): 101-114

Keywords: barite; heavyweight concrete; self-consolidating concrete (SCC); stability; superplasticizer.

Date: 10/1/2009

Abstract:
Heavyweight concrete made of water, cement, and heavyweight aggregate is used for shielding in structures where radiation protection is required. Water reduction helps to achieve high density mixtures, since water is the component with the lowest specific gravity. Thus, the use of superplasticizers helps to obtain workable concrete with low water-cement ratio (w/c) and high density. This paper discusses properties for heavy-weight self-consolidating concrete (SCC) made with polycarboxilic-based superplasticizer and barite aggregate. Fresh concrete properties were characterized using the suitable test methods employed in SCC. Since segregation is a key issue in this type of concrete due to the large difference between the densities of the mortar and coarse aggregate, some specific tests were carried out in concrete columns to verify homogeneity of the concrete, including the measurement of the capillarity and water permeability.