Possible application of recycled concrete aggregate for production of steel fiber reinforced concrete
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Lack of good-quality natural aggregates well as the problem of removal and
disposal of large quantities of demolished concrete waste, represent significant challenges
in contemporary civil engineering. The testing results of properties of recycled concrete
aggregate are presented in the first part of the paper. The second part deals with
experimental research on properties of fresh and hardened concrete made with 50%
substitution of coarse river aggregate by recycled concrete. Four series of concrete
specimens were tested, two of which were made with addition of steel fibers. The research
included testing of the following properties: density, compressive strength, splitting tensile
strength, adhesion by pull-off method, static modulus of elasticity, as well as the impact
resistance. The obtained results indicate that recycled concrete aggregate can be
successfully applied for production of steel fiber reinforced concrete