Abstract
The article analyzes the use of polymetallic ores’ tailings as a basis for production of composite cements and concrete, having protective properties against gamma and X-rays radiation, as well as high strength and lifetime. The main practically significant result is: the development of scientific and technological production bases of new high-tech type of multicomponent hydraulic binders for concretes – composite cements; the identification of new hydration products in composite cements with addition of polymetallic ores’ tailings; the development of optimal compositions of composite cements for concretes. It is established that the composite cements, that developed by us on the basis of polymetallic ores’ tailings, meet modern requirements i.e. its improve the construction-technical properties of material, have positive effect to the environment situation and allow to reduce the production cost of the final product. Their technology is low metal-intensive and<br />power-consuming. Studies of physical-chemical processes of composite cements structure formation with addition of polymetallic ores’ tailings have been conducted using methods such as chemical, X-ray phase, differential-thermal and electronmicroscopic analysis methods.
Highlights
At the present stage of sustainable development of our country under conditions of continuous production scale growth and consumption of mineral raw materials, the problem of efficient and rational use of industrial technogenic mineral formations has a notably important national economic significance. The urgency of this problem is caused by limitation of mineral deposits, complicacy of mining and geological conditions concerning ore bodies’ settings and appreciation of their extraction, deterioration of quantitative and qualitative composition of extracted ores from depths, fluctuations of prices of raw materials in the world market, as well as negative influence of accumulative technogenous resources on the environment, etc
Carbonated particles compact the structure of concrete or mortar, and thereby increase their strength with significantly less consumption of cement. Such changes in ratios of highly basic minerals in the composition of composite cements at hydration and hardening of cement minerals contribute to formation of mainly calcium hydrosilicates of low-basic form of CSH (B) type, which are more high-strength than their highly basic forms
The protective properties can be improved due to the content of chemically bound water, which is the moderator of neutrons
Summary
At the present stage of sustainable development of our country under conditions of continuous production scale growth and consumption of mineral raw materials, the problem of efficient and rational use of industrial technogenic mineral formations has a notably important national economic significance The urgency of this problem is caused by limitation of mineral deposits, complicacy of mining and geological conditions concerning ore bodies’ settings and appreciation of their extraction, deterioration of quantitative and qualitative composition of extracted ores from depths, fluctuations of prices of raw materials in the world market, as well as negative influence of accumulative technogenous resources on the environment, etc. Technogenic mineral formations that existing in Kazakhstan used only in the limit of 6‒7% of Their extensive use in production cycle allows to increase the resource conservation on a large scale due to economy of operational and capital costs for exploration.
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