RADIO-PROTECTIVE MATERIAL Russian patent published in 2009 - IPC G21F1/00 

FIELD: civil engineering.

SUBSTANCE: invention relates to construction materials industry and can be used for manufacturing of structural elements, products and structures, provided for protection against ionising emissions. Radio-protective material consists of filler in the form of lead fraction, filler in the form of iron shot with diametre correspondingly 3 mm and 1.0-1.5 mm and coupling medium. This medium includes main ingredients, in the capacity of which there are used powder magnesia and acoustic, water solution of chloride magnesium, and modifying agent, consisting chloride of three-valence metal, mixture of triglyceride of fatty acids and methylcellulose. Above mentioned components of material are in following ratio, wt %: powder magnesia acoustic 9-11; water solution of chloride magnesium 4.3-5.5; chloride of three-valence metal 0.1-0.5; mixture of triglyceride of fatty acids 0.1-0.3; methylcellulose 0.015-0.020; filler (iron shot with diametre 1.0-1.5) 5-10; filler is the rest.

EFFECT: patented substance increases linear attenuation factor gamma radiation for 8,2-10%, durability at compaction - for 20-30% with keeping of high performance by water- and freeze-thaw durability.