Quantitative and Qualitative Aspects of Composite Action of Concrete and Dispersion-Reinforcing Fiber

Polymers

Sergey A. Stel’makh¹  Evgenii M. Shcherban’¹  Besarion Meskhi²  Levon R. Mailyan³  Alexey Beskopylny⁴  Valery Varavka⁵ 

[1] Department of Engineering Geology, Bases, and Foundations, Don State Technical University, 344003 Rostov-on-Don, Russia;Department of Life Safety and Environmental Protection, Faculty of Life Safety and Environmental Engineering, Don State Technical University, 344003 Rostov-on-Don, Russia;Department of Roads, Don State Technical University, 344003 Rostov-on-Don, Russia;Department of Transport Systems, Faculty of Roads and Transport Systems, Don State Technical University, 344003 Rostov-on-Don, Russia;Research and Education Center “Materials”, Don State Technical University, Gagarin sq. 1, 344003 Rostov-on-Don, Russia;

关键词: glass fiber;    dispersion-reinforcing fiber;    fiber concrete;    concrete matrix;    strength characteristics;    strain characteristics;   

DOI  :  10.3390/polym14040682

来源: DOAJ

【 摘 要 】

The interest in using polymer-dispersed reinforcement in the construction industry in the context of sustainability has led to significant research on this scientific problem. The article is devoted to studying the processes of fiber interaction depending on its dispersion and the concrete matrix, and their combined contact work during the formation of a concrete structure, work under stresses arising in a concrete body, and during a collapse. The physical and mechanical processes of deformation and destruction of the “matrix–fiber” system were studied using high-precision microscopic equipment, and the nature of the work and deformation of fibers in concrete were revealed. The work aimed to establish and characterize the quantitative and qualitative aspects of the concrete matrix and dispersion-reinforcing fiber combined work. It was established that the best values of the adhesion index were observed at a volume content of fiber in the amount of 2% by weight of cement, regardless of the type of dispersion-reinforcing fiber. It was shown that the microstructure of polydispersion-reinforced fiber-cement specimens was denser, and microcracks formed during fracture in polydispersion-reinforced specimens had a smaller opening width. It was established that polydispersion-reinforced concrete had higher values of strength (up to 126%) and deformation (up to 296%) characteristics compared to monodispersion fiber-reinforced concrete.

【 授权许可】

Unknown