The use of calcium polysulfide sealer, which can be obtained by dilution of sulphur in lime suspension heated to 95 оС, when producing concrete of high specific weight provides improvement of its strength while being compressed by 30-50%. In doing so, up to 50% portland cement in the composition of binding one can be replaced with metallurgic ferriferrous slag or ferriferous stubs.
The article deals with the rational use of water resources, as well as protecting the environment from the harmful effects of human industrial activities. The aim of the study is to find ways to increase the productivity of existing treatment facilities and the quality of mine water treatment. The proposed solutions will lead to a reduction in discharges of untreated mine waters, a reduction in environmental payments and consumption of fresh water.
The problem of prevention and liquidation of emergency situations, including terrorist acts is investigated. The improvement of weapons and the professionalization of terrorist organizations make it difficult to determine the cause of natural and man-made emergencies. Therefore, the dominance in Russia of the territorial principle of functioning of the unified state system for the prevention and elimination of emergency situations meets the challenges of time less and less. The urgency of mechanisms of extraterritorial mobilization of forces and means of prevention and liquidation of emergency situations is proved. The existing system of prevention and liquidation of emergency situations of natural and man-made character is connected with the key role of the Ministry of emergency situations of Russia. At the same time, the military Department is in charge of responding to emergency situations determined by military threats. It is proposed to change this hierarchy, defining the leading role of the military Ministry.
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