Strength and durability properties of polypropylene fiber reinforced, recycled coarse aggregate concrete
  Sneha Das, Paramveer Singh and Vijyant Singh Negi
  The evolution of concept of using sustainable construction material and producing ‘green concrete’ has made recycling a prominent part of the construction industry. This research paper investigates the strength and durability properties of concrete by partially replacing conventional natural coarse aggregate (NCA) with recycled coarse aggregate (RCA). This facilitates to remove the burden of extraction of already limited natural resources. In addition, the environment pollution caused due to disposal of waste materials can also be kept in check by using RCA. Polypropylene fiber is used as an additive in the construction industry to enhance the properties of concrete. In this research work, NCA has been replaced by RCA at 0%, 15%, 30% and 45%, and to these mixes, the effect of addition of polypropylene fiber on strength and durability properties of concrete in percentages of 0%, 0.5%, 1% and 1.5% have been studied. From this research work, it can be concluded that all the concrete mixes produced in this research work by combination of RCA and polypropylene fiber falls under the category of structurally efficient concrete.