Shrinkage and Creep of Steel Fiber Reinforced Normal Strength Concrete

Abstract

This paper deals with the results of laboratory research into the time-related development of shrinkage and creep in normal strength concrete that has been steel fiber reinforced with volumetric contents of up to 2.0 % of shorter (l = 16 mm) or longer (l = 30 mm) steel fibers. The experimental research refers to the respective effects of the length and volumetric content of such fibers, as well as to the effect of early water curing conditions on the shrinkage and creep of the composite concerned. The results of the measurement of the autogenous, drying, and total shrinkage and the creep of the tested composites, as well as those corresponding to comparable concrete without fibers, are presented in the paper. The results of the experimental research show that the total shrinkage of such composites is, in general, about 15 % less than that of the comparable plain concrete without fibers. The autogenous shrinkage of the composites was nearly the same, but the drying shrinkage was considerably less than in the case of the comparable plain concrete. However, the creep of these composites differed only minimally from that of the comparable plain concrete.

Study on Shrinkage Properties of Repairing Mortar Modified by Basalt Fiber

“…Some researchers found that the shrinkage properties of cement-based materials are significantly improved after the addition of appropriate fibers, such as steel fiber (SF) (Al-musawi et al 2019, Roberti et al 2020 , polypropylene (PP) fiber (Marushchak et al 2022, Ma et al 2022, basalt fiber (BF) (Punurai et al 2018, Zheng et al 2019. Some characters (Saje et al 2013, Ma et al 2017, George and Abin Thomas 2020 of fiber, like length, length-diameter ratio and the dosage of fiber, have great influence on the improvement of shrinkage. In the cement hardening stage, these fibers are evenly distributed in matrix and connected with plenty of the pores in the interior, which inhibit partial shrinkage cracks.…”

Deformation and Strength Characteristics for the Calculation of Structures Based on Fiber-Reinforced Concrete Composites

“…Expansion of the application areas of fiber-reinforced concrete is possible only if the effectiveness of this implementation is justified, which cannot be done without determining and introducing into the calculation of structural elements improved deformation and strength parameters of fiber-reinforced concrete instead of the traditional characteristics of heavy concrete [8][9][10][11].…”