Kuzmenko O.M., Petlovanyi M.V., Lozynskyi V.H. Еffect of chemical elements of solid mass of mixtures at filling technogeneous cavities in the earth crust

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 142

Geoteh. meh. 2018, 142, 33-44

https://doi.org/10.15407/geotm2018.142.033

EFFECT OF CHEMICAL ELEMENTS OF SOLID MASS OF MIXTURESAT FILLINGTECHNOGENEOUS CAVITIES IN THE EARTH CRUST

KuzmenkoO.M., PetlovanyiM.V., LozynskyiV.H.

Аuthors:

Kuzmenko O.M., Doctor of Technical Sciences (D.Sc.), Professor

Petlovanyi M.V., Candidate of Technical Sciences (Ph.D.), Associate Professor

Lozynskyi V.H., Candidate of Technical Sciences (Ph.D.), Associate Professor

UDC 622.273.217.4

Language: Russian

Annotation.

In the paper, the investigation results of the effects of chemical elements of solid mass of mixtures on concrete block strength characteristic while filling technogeneous cavities in the earth crust are given. A comprehensive methodological approach to the investigation is proposed. It includes chemical and X-ray phase analysis of the mineral composition of the filling mixture components, scanning microscopy method, X-ray microanalysis, and experimental studies on determining uniaxial compressive strength of the samples. Chemical and mineralogical composition of the filling mixture components was studied by X-ray phase analysis, and influence on concrete block structure was determined. Influence of mineral grain release in components of the filling mixture and specific surface of particles containing cement-forming chemical elements on the concrete block structure and its strength is established. A quantitative estimation of the change of concrete block strength in the range of the specific surface of binder material 2000 – 6600 cm²/g is given. Attention is focused on importance of new concrete block transition from gel state to the crystalline one. Aspects of mutual influence of CaO and MgO oxides in the granulated blast-furnace slag, fluxing limestones and crushed dump rocks on the strength of the hardening mixture were studied. It is shown that the degree of grinding of components in the solid phase of the filling mixture significantly affects the structure of formation of solid mass and its strength, but is within a certain interval of disclosure of intergrowths that are carriers of chemical elements and their value in the formation of the structure of cement stone. It is recommended to consider the chemical composition of geological formations when forming an artificial concrete block in the rock massif because this factor can significantly affect the strength characteristics for accepting external loads. Tempering of filling mixture with salt solutions requires additional study with considering economic feasibility and environmental safety for conservation of mineral resources.

Keywords:

hardening mixture, concrete block, strength, specific grain surface, enclosing rocks, X-ray phase analysis, scanning microscopy.

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About the authors:

Kuzmenko Oleksandr Mykhailovych, Doctor of Technical Sciences (D.Sc.), Professor, Professor of the Underground Mining Department, Dnipro University of Technology MSE of Ukraine, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Petlovanyi Mykhailo Volodymyrovych, Candidate of Technical Sciences (Ph.D.), Associate Professor of the Underground Mining Department, Dnipro University of Technology MSE of Ukraine, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

Lozynskyi Vasyl Hryhorovych, Candidate of Technical Sciences (Ph.D.), Associate Professor of the Underground Mining Department, Dnipro University of Technology MSE of Ukraine, Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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