The effect of the concentration of steel fibres on the properties of industrial floors

Abstract

The effect of the concentration of steel fibres on the properties of industrial floors Wpływ zawartości włókien stalowych na właściwości posadzek przemysłowych Abstract This paper presents the results of a series of experiments on samples made of steel fibre reinforced concrete. The investigated samples were made with different concentrations of steel fibres ranging from 20.0 to 32.5 kg/m3. Twenty-one cubic samples (15 x 15 x 15 cm) and fourteen cuboid samples (15 x 15 x 60 cm) were used for this investigation. The article focusses on the effect of the concentration of steel fibres on the properties of industrial floors. for this purpose, both destructive and non-destructive methods were used and compared. as a result of this study, it has been proved that compressive and flexural tensile strength are lower with increasing air content and decreasing density of concrete. moreover, it was found that there is a correlation between ultrasonic pulse velocity and rebound hammer results which together can be used to estimate the compressive strength of steel fibre reinforced concrete. Streszczenie W niniejszym artykule przedstawiono wyniki serii eksperymentów wykonanych na próbkach z betonu zbrojonego włóknami stalowymi. badane próbki zbrojone były różną zawartością włókien stalowych od 20.0 do 32.5 kg/m3. Do badań użyto 21 sześciennych (15 x 15 x 15 cm) i 14 prostopadłościennych (15 x 15 x 60 cm) próbek betonowych. W artykule skupiono się na zbadaniu wpływu zawartości włókien stalowych na właściwości posadzek przemysłowych. Do badań zastosowano i porównano metody niszczące oraz nieniszczące. W rezultacie udowodniono, że wytrzymałość na ściskanie i rozciąganie przy zginaniu zmniejsza się wraz ze wzrostem zawartości powietrza i malejącą gęstością betonu. Ponadto stwierdzono, że istnieje korelacja między wynikami ultradźwiękowymi i sklerometrycznymi, które mogą być wykorzystane do oszacowania wytrzymałości na ściskanie betonu zbrojonego włóknami stalowymi. Słowa kluczowe: włókna stalowe, posadzki przemysłowe, metody nieniszczące

Evaluation of the Adhesion between Overlays and Substrates in Concrete Floors: Literature Survey, Recent Non-Destructive and Semi-Destructive Testing Methods, and Research Gaps

“…In many cases, the failure to comply with technological and technical requirements has a negative effect on the condition of cement mortar floors [78]. In order to obtain parameters to the required level, the following additional activities, which are shown in Figure 20 Different types of fiber, such as polypropylene, polyethylene, nylon, aramid, and polyester are also commonly used as an additive to concrete in order to improve its mechanical and functional properties [79][80][81][82][83][84]. However, the most common overlay additives are polypropylene fibers [85].…”

Estimation of Post-Cracking Dissipation Capabilities of Fiber Reinforced Concretes in Three Point Bending Test Monitored with Application of Digital Image Correlation System

“…This effect is also visible during the analysis of the microstructure of the hardened concrete—an increase in the macro-porosity of the hardened concrete is observed and the pores are located in the vicinity of larger clusters of fibers [ 18 ]. The effect of additional macropores in FRC is particularly pronounced in relation to concretes with a high fiber content [ 20 ], in which the compressive strength decreases compared to plain concrete. At low fiber contents, workability disturbances are minor and do not lead to this effect.…”

Experimental Investigation of Ultrasonic Pulse Velocity (UPV) Test Specimen in Assessing the Strength of Steel Fiber Reinforced Concrete Structure

“…Steel-fiber reinforced concrete generally works for shotcrete technology. It has become widely used for structural elements as its heterogeneous structural material [1]. It can reduce construction time and protect the structure from cracking.…”