The present paper considers the study of creep and deformation properties of sulfur-containing arbolit exposed to various compression stresses. Investigating the creep of lightweight arbolit concretes greatly affecting the performance of bearing and envelope structures draws a special attention during the last years. This issue is of particular relevance in the regions with hot and sharp continental climate. Arbolit concrete is one of the lightest building materials with low thermal conductivity and good soundproof properties. The modern postulates of theory and practice of creation, development of high-strength arbolit concretes on the base of composite sulfur-containing binders have become the methodological framework of the present research. While carrying out scientific research, the following standard measuring and analysis methods of physical and mechanical properties have been used for sulfur-containing arbolit composites. Experimental tests have been implemented on the 28-days samples made of sulfur-containing arbolit, with the cotton plant footstalks as an organic component. The researched samples were vapor sealed with the purpose to eliminate overlapping the processes of contraction and creep. The experimental results have shown that the analysis of prisms deformation in time demonstrates certain derivation from the pattern. Deformation of prisms made of sulfur-containing arbolit loaded at the low stress level were growing at a slower rate that the same deformations at a higher stress level. No derivation has been observed for the prisms of sulfur-containing haydite concrete. For both types of concrete, creep deformation has reached the values exceeding completely recoverable deformation by a factor of 2 or all the samples, the rapid growth of creep deformation has been observed after loading, followed by the gradual slowdown of deformation growth. For sulfur-containing lightweight concretes, as the test shown, the rate of creep deformation growth depends on the hardening curve in time reflecting the process of concrete hardening. This, if compared with sulfur-containing lightweight concretes, creep of sulfur-containing arbolit concrete is significantly lower that eventually leads to the loss of creep deformation at the same stress level. The obtained results can be used when manufacturing an efficient wall material for residential construction, including seismic areas.

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The present paper considers the issues of mutual neutralization and toxicity elimination of toxic components of industrial by-products as well as the study of strength formation for sulfur-containing woodcrete composites exposed to various permanently acting loads and curing conditions in time. Woodcrete-concrete composites could be considered as one of the available lightweight heat insulating building materials with low heat conductivity and good sound proofing properties. The materials are based on recyclable raw materials widely available in the regions of Kazakhstan and Russia. The contemporary provisions of theory and practice of development of efficient lightweight woodcrete-concrete on the base of composite sulfur-containing binders obtained by the method of toxicity elimination and mechanochemical activation served as the methodological foundation of the research. While implementing scientific research, the authors used the standard measuring instrumentation and methods of analysis of physical and mechanical properties of woodcrete composites such as the up-to-date methods of X-ray diffraction analysis, differential thermal and microscopic analyses and testing equipment. The principle of mutual neutralization of toxic components of industrial by-products by means of mechanochemical treatment at low temperature has been applied in the paper. These methods allow reducing cement content due to its fractional replacement by industrial waste. For the experimental part of the research, ferrous iron with the oxidation number 3 (Fe2O3) has been used as the oxidizing agent, while elemental sulfur, wood coal dust and ferrous iron with the oxidation number 2 (FeO) have demonstrated regeneration properties. The properties of sulfur-containing woodcrete specimens have been studied after 7, 28 and 90 days of exposure in various curing conditions. It was stated that sulfur-containing woodcrete had been fractioned gradually, first, decomposition of mortar constituent part took place, then of organic filler fibers. The obtained results could be applied while manufacturing efficient walling material for civil engineering buildings and structures, including seismic areas.

In the present paper, there were considered the issues of developing optimal compositions and the study of the impact of sulfur addition on strength properties of sulfur containing binders for building materials. The purpose of the research is the development of scientific principles of physical and chemical mechanics for detoxification of wastes produced by oil-processing and metallurgical industries while obtaining sulfur containing binders with enhanced adhesive and strength properties altered by the directed mechanochemical effects. While carrying out the scientific research, there have been used standard measurement methods and the methods of analysis of physical and mechanical properties of sulfur containing binding compositions obtained by the contemporary methods of analysis and testing equipment. As the result of the research, new binding substances with improved adhesive properties have been obtained and sulfur containing structural materials with the complex of enhanced physical and mechanical properties have been developed on their basis.

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