RUBBER SHEET CONTAINING NO VULCANIZING AGENT FOR BEING INSTALLED ON SURFACE OR UNDER GROUND, AND METHOD FOR BLOCKING OR REDUCING RADIATION RELEASED FROM RADIOACTIVELY CONTAMINATED GROUND SURFACE BY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a natural rubber sheet for blocking and rays released from a radioactively contaminated ground surface around a living environment, and in which inorganic filler is mixed with natural or synthetic rubber and vulcanizing agent and vulcanization accelerator are not added.SOLUTION: A rubber sheet is formed by mixing (kneading) 100 to 350 pts.wt. of any one of iron sand, barium sulfate and zeolite, or a mixture thereof with 100 pts.wt. of natural or synthetic rubber, and adding no vulcanizing agent or vulcanization accelerator thereto. Blocking layers A, B and C are structures formed by sandwiching any one of iron sand, barium sulfate and zeolite, or a mixture thereof between the rubber sheets. The above rubber sheets and structures are installed on a ground surface or under the ground, in order to suppress radiation dose of and rays and the like released from the radioactively contaminated ground surface around a living environment.