Prospects of application of roller compacted concrete in hydro schemes of Ukraine

¹ Kharkiv National University of Civil Engineering and Architecture, Department of Building Technology, 40 Sumska Str., Kharkiv, 61002, Ukraine
² Kharkiv National University of Civil Engineering and Architecture, Department of Geotechnics, Underground and Hydrotechnical Structures, 40 Sumska Str., Kharkiv, 61002, Ukraine

^* Corresponding author: butniksvet@gmail.com

Abstract

Prospects of application of roller compacted concrete in hydro schemes of Ukraine are considered. The number of dams erected with application of roller compacted concrete is growing year after year in the world. Roller compacted concrete is an especially dry concrete mixture with decreased content of cement and increased content of pozzolana (fly ash). The broad physico-mechanical peculiarities of roller compacted concrete depend not only on its composition but also on technology of its laying and compacting in dam. Rapid construction of gravity dams with use of equipment for earth-moving works enables the more economic construction of protective embankments. Prospects of application of roller compacted concrete during erection and restoration of existing protective embankments in regions with increased flood hazard in the west of Ukraine are considered. The use of roller compacted concrete allows reducing construction deadlines by a factor of 2–3, and, in so doing, reducing the labor content by a factor of 4–5 at the expense of full mechanization of works. Decrease in content of binder in composition of roller compacted concrete by 30–80 kg/m3 favors decrease in heat release and, correspondingly, the occurrence of temperature contraction cracks, which in its turn favors economy during construction of hydro-technical structures of hydro schemes.