Dependence of structural and stress-strain variatropic efficiency coefficients of spun concrete on grain size composition of coarse aggregate

At present, developing and improving low-material, energyand resource-intense technologies to manufacture concrete and reinforced concrete products and structures have become a topical issue in the construction industry. Therefore, centrifugation technology is promising. In this article, the formulation of concrete with variatropic structure was improved, and the methods for its qualitative and quantitative assessment were developed. Seven annular cross-section reference samples were manufactured and tested. Based on the test results of centrifuged concrete samples with different grain size compositions of the coarse aggregate, the empirical values of the integral and differential strength and deformation characteristics of concrete were determined. The structural and stress-strain variational efficiency coefficients were calculated and analysed. The optimal grain size composition of the coarse aggregate was determined and allows centrifuged concrete with an enhanced variatropy to be obtained, as well as the most effective coefficient of variatropic efficiency. The prospects for further enhancing the variatropy of centrifuged and reinforced concrete products and structures by improving the formulationtechnological factors were determined.

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