Вестник Дагестанского государственного технического университета: Технические науки (Jun 2018)
HIGH-STRENGTH CONCRETE BASED ON THE USE OF SECONDARY TECHNOGENIC RESOURCES
Abstract
Objectives. Secondary raw materials comprise a valuable means of offsetting previously realised investment and energy costs; moreover, due to not requiring funds for quarrying and processing of raw materials, their use is typically more cost-effective than the development of primary natural resources. The development of new efficient composites based on secondary resources for high-rise construction is a relevant issue.Methods. The production of high-strength concrete is based on modern technological methods that improve the technical and physical-mechanical properties in the integrated use of technogenic raw materials and effective chemical additives.Results. In this paper, prospects for the use of technogenic raw materials generated by the CHP plant of the city of Grozny in combination with rock crushing waste are described. The natural and technogenic raw material base of the Chechen Republic has been studied and the formulations of ash cements and compositions of high-strength concrete V60 classes for compressive strength with complex use of natural and technogenic raw materials for introduction into the construction of high-rise complexes were obtained.Conclusion. The use of fly ash and Polyplast superplasticiser has a favourable effect on formation processes of the structure and porous space of cement stone with an optimal additive proportion of 1.6%. The complex use of secondary resources made it possible to obtain a waterproof and high-strength composite having significantly better physical and mechanical properties than traditional concrete. The developed formulations of ash binders and concretes based on fine-dispersed ash microspheres and enriched artificial aggregates promoted recycling of secondary raw materials and improvement of the ecological situation in the region.
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