![]() ![]() The aim of this paper is to investigate the influence of volume fraction and aspect ratio of steel fibers on the basic engineering properties of hybrid steel fiber reinforced concrete. ![]() In recent years, a new type of fiber reinforced concrete (FRC), called hybrid FRC, comprised of fibers of the same material but with different geometry has been developed. A comparison is also made between the results obtained from single-fiber pull-out tests and conventional single-lap shear bond tests to highlight the differences/similarities between these two test methods. The tests are performed on a (unidirectional) steel-based and a (bidirectional) glass-based TRM composite as common reinforcing systems. From the obtained results, bond-slip laws are proposed for TRM composites made of unidirectional and bidirectional grids. This paper presents a combined experimental and analytical study on the effect of fiber-embedded length and configuration on the pull-out response. Despite the importance of the latter, that controls the crack distribution on these composites, have received few attentions and is relatively unknown. The effectiveness of these composites in structural reinforcement is significantly dependent on the TRM-to-substrate and the fiber-to-mortar bond behavior. The use of Textile Reinforced Mortar (TRM) composites for Externally Bonded Reinforcement (EBR) of reinforced concrete (RC) and masonry structures has attracted several attentions during the last years. This report summarizes the project findings and provides recommendations for the implementation of SFRC in Arizona Department of Transportation infrastructure. Finally, all results were compiled to develop design recommendations and an implementation plan. ![]() ![]() Results of the case studies informed the development of an experimental test program. This was followed by case studies on implementation of SFRC for pavement and bridge decks. The first was a review of the literature on SFRC applications to elevated slabs and slabs-on-grade. The project consisted of four main tasks. This project investigated the application of SFRC in pavements and bridge decks to reduce the amount of traditional steel used and to improve service level performance. To maximize the benefits of SFRC, it is necessary to establish optimal mix designs, identify target projects for implementation, and validate design procedures for SFRC. These benefits can result in cost savings in both the short term (construction labor) and the long term (improved quality and durability). This can lead to a reduction in structure weight and improvements in the safety and speed ofĬonstruction. This improved performance can be used in slabs to reduce the volume of conventional steel reinforcement, create longer spans, or reduce slab thickness. Steel fiber-reinforced concrete (SFRC) provides improved tensile performance of concrete. ![]()
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