heavyweight concrete

high-density concrete, heavy concrete, heavyweight concrete

Concrete of exceptionally high unit weight, usually consisting of heavyweight aggregates; used esp. for radiation shielding.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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Shielding materials can consist of lead, normal weight concrete, heavyweight concrete, steel plates, composite materials, or other options.
Bulk density Specific heat capacity Wall ID [rho], kg/[m.sup.3] [C.sub.0], J/kgK (Ib/[ft.sup.3]) (Btu/Ib x [degrees]F) Lightweight Concrete 850 (53) 850 (0.20) Heavyweight Concrete 2400 (150) 800 (0.19) Ceramic tiles 2000 (125) 1000 (0.24) Lime cement Mortar 2000 (125) 800 (0.19) Gypsum plaster 850 (53) 850 (0.20) Expanded PS-foam 34 (2) 1300 (0.31) Steel 8000 (500) 920 (0.22) Thermal conductivity Wall ID [lambda],W/mK(Btu x in/h x [ft.sup.2] [degrees]F) Lightweight Concrete 0.2(1.39) Heavyweight Concrete 1.5(10.40) Ceramic tiles 1 (6.93) Lime cement Mortar 1.5(10.40) Gypsum plaster 0.2(1.39) Expanded PS-foam 0.04 (0.28) Steel 20 (138.70) Table 6.