Abstract
Abstract Steel Fiber Reinforced Self-Compacting Concrete (SFRSCC) is a material that combines the benefits of self-compacting concrete in the fresh state and the greater durability, with the gains of fiber- reinforced concrete in the hardened state, especially the gains in residual flexural strength. Results are presented in this paper of residual flexural strengths on 48 prenotched prisms conducted in accordance with RILEM TC 162 TDF for the Steel Fiber Reinforced Self-Compacting Concretes (SFRSCC). This article presents equations to estimate residual flexural stresses in SFRSCC. For this, SFRSCC prisms of two compressive strength classes, 20 MPa and 40 MPa, were produced with 3 different types of steel fibers with the contents volume of 0.5% and 1.0%. Based on the test results, equations were proposed to determine the residual flexural stresses established through regression analysis, which were, then, further validated with concretes produced in this work and results available in the literature. The equations found, despite showing an indication of the residual flexural strengths that will be achieved, obtained a relatively high error. In order for the equations to be applied in a technical way, further studies for a larger sample need to be carried out, seeking to optimize the equations.
Highlights
The Steel Fiber Reinforced Self-Compacting Concrete (SFRSCC) is an material that combines the benefits of fiber reinforced concrete such as tenacity gain and the ability to withstand residual post-cracking tensile stresses, with the characteristics of self-compacting concrete, such as workability, and the ability to fill and to overcome restrictions without segregating, which eliminates the use of vibration during casting
Hereinafter the specimens are identified by the following nomenclature “X-YST-Z/W”, where: X is the nominal compressive strength, Y is the fiber volume and ST-Z/W is the type of fiber, where Z is the length and W is the aspect ratio of the steel fiber
Despite the variations found in the different SFRSCC, there were no major changes promoted by the addition of fibers in the compressive strength of the concrete
Summary
The Steel Fiber Reinforced Self-Compacting Concrete (SFRSCC) is an material that combines the benefits of fiber reinforced concrete such as tenacity gain and the ability to withstand residual post-cracking tensile stresses, with the characteristics of self-compacting concrete, such as workability, and the ability to fill and to overcome restrictions without segregating, which eliminates the use of vibration during casting. There are already some studies that try to determine the influence of fiber volume and its characteristics such as fiber type and compressive strength [8]–[14] in the post-cracking behavior of concrete, the dosage of SFRSCC has been performed, in most times, empirically. This work determined new equations to estimate the residual strengths of SFRSCC, inserting the geometric characteristics, the fiber volume content and the compressive strength the matrix as input variables. The determination of equations that allow the estimating residual strength based on the materials used for the production of the SFRSCC can contribute to increase the use of this concrete, considering it will make it possible to perform more rational mixture of this material
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
