Experimental analysis of fiber‐reinforced recycled aggregate self‐compacting concrete using waste recycled concrete aggregates, polypropylene, and steel fibers

Abstract

Self-compacting concrete (SCC) is a cementitious composite which serves complex formworks without mechanical vibrations with superior deformability and high resistance to segregation. Besides, the recycled aggregate concrete (RAC) is also developing rapidly and along with the ever-increasing sustainable demand for infrastructure. The combination of the fibers, RAC, and SCC may create advantages for the construction industry. In this study, the polypropylene (PP) fiber at 0.1, 0.15, 0.2, and 0.25% volume fractions and steel fibers at 0.25, 0.5, 0.75, and 1% volume fractions are introduced into fiber-reinforced recycled aggregate selfcompacting concrete (FR-RASCC). Both fresh property and hardened mechanical performance, comprising compressive and tensile strengths and modulus of elasticity are analyzed. The fibers validate the optimal 0.1% volume fraction for PP fiber and 0.75% volume fraction for steel fiber. In addition, the results are proved to enhance the mechanical properties and reduce cracking despite the negative impact on the fresh property. Moreover, the experimental outcomes are compared with previous researches to establish the linear model, demonstrating the relationship between fiber fraction and the mechanical properties. K E Y W O R D Sfiber-reinforced recycled aggregate self-compacting concrete, polypropylene fibers, recycled aggregate concrete, self-compacting concrete, steel fibers

Influence of Fiber Addition on the Properties of High-Performance Concrete

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Generative Design in Building Information Modelling (BIM): Approaches and Requirements

“…Secondly, downstream technologies such as 3D printing or robotic arms in construction [ 114 , 115 , 116 , 117 , 118 , 119 , 120 , 121 ] can be integrated to automatically construct the GD solutions generated beforehand. Moreover, GD-BIM demonstrates promising potential in smart engineering composites [ 122 , 123 , 124 ] as well as artificial intelligence aided optimization [ 125 , 126 , 127 , 128 ]. Thus, an entire automated process from site analysis, design exploration, construction information generation, to design construction would be established, which could considerably save manpower and improve the buildability of designs.…”

Influence of Different Fiber Dosages on the Behaviour of Façade Anchors in High-Performance Concrete

“…The results show that the compressive strength decreases with increasing fiber content. For the normal strength concretes, the higher dosage will increase compressive strength (research by Aslani and Meesala [41,42] with the strength class under 30 MPa), but the opposite trend is valid for higher strength concretes (research by Zhang et al [43] with a compressive strength up to 100 MPa). The space between concrete and fibers is filled with air.…”