FIELD: construction engineering. SUBSTANCE: compound has following composition, mass percent: sulfur 25-30; pulverized filler of 0.14-mm fraction - 20-25; sand of 0.14-5.0-mm fraction - 20-25; gravel of 5-10-mm fraction - the rest. Filler, sand, and gravel include radiation-clean ultrabasic rock such as seprentinite or quartz rock having content of radionuclides (uranium-thorium-potassium) lower than 10-6 g/g. EFFECT: improved mechanical strength and shielding from natural radiation level. 2 cl, 4 tbl
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