Title:
Products & Practice Spotlight: Manufacture and Placement of Ultra Heavyweight Concrete
Author(s):
Jim Noller, Manjit Chopra, Kyle Hargreaves, and Brian H. Green
Publication:
Concrete International
Volume:
38
Issue:
12
Appears on pages(s):
47-50
Keywords:
aggregate, steel, specific gravity, mixture
DOI:
10.14359/51689524
Date:
12/1/2016
Abstract:
Heavyweight concrete was used for radiation shielding of a new emergency department located above the future radiation oncology department at the Lahey Hospital and Medical Center in Burlington, MA. The concrete mixture incorporated steel aggregate with specific gravity (SG) of 7.74 and coarse and fine crushed, high-density, mineral aggregates with SG of 5.0. Design and mixture requirements, as well as material delivery and concrete placement, are discussed.
Related References:
1. ACI Committee 211, “Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete (ACI 211.1-91) (Reapproved 2009),” American Concrete Institute, Farmington Hills, MI, 1991, 38 pp.
2. ASTM C33/C33M-11a, “Standard Specification for Concrete Aggregates,” ASTM International, West Conshohocken, PA, 2011, 11 pp.
3. ACI Committee 304, “Placing Concrete with Belt Conveyors (ACI 304.4R-95) (Reapproved 2008),” American Concrete Institute, Farmington Hills, MI, 1995, 15 pp.