• 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: Properties of Radiation Shielding Concrete

Author(s): Kazuhisa Shirayama

Publication: Journal Proceedings

Volume: 60

Issue: 2

Appears on pages(s): 261-280


DOI: 10.14359/7855

Date: 2/1/1963

Reports on a study of boron-containing aggregates from the United States and England and of seven heavy aggregates from Japan. Data are presented and discussed concerning mix proportions, workability, unit weight, strength, drying shrinkage, and absorption coefficients for gramma-and x-rays. Based on data obtained for mix proportions, formulas for estimating the unit weight of concrete from the specific gravity of the aggregate are proposed. The hematite ore used was found to be unsuitable for concrete aggregate because of an excessive amount of fines coating its surface. The tests indicated that, of the boron-containing material, the deleterious effects of colemanite on concrete strength and setting time is greater than that of borocalcite. This effect increases with increased fineness. The barite concretes provided better shielding against x-rays than anticipated from density calculations. Barite or magnetite concretes were more suitable in shielding against gamma rays.


Please enter this 5 digit unlock code on the web page.