Abstract
This research work is aimed to investigate how the addition of various proportion of polypropylene fibre affects the mechanical strength and permeability characteristics of recycled aggregate concrete (RAC) which has been produced with treated coarse recycled concrete aggregate (RCA). Further research on RAC properties and their applications is of great importance as the scarcity of virgin aggregate sources in close proximity to major urban centers is becoming a worldwide problem. In this study, the hardened RAC properties at the curing age of 7 and 28 days such as compressive strength, flexural strength, ultrasonic pulse velocity (UPV), water absorption and total porosity were evaluated and compare with control specimens. Experimental result indicates that although the inclusion of the treated coarse RCA can enhance the mechanical strength and permeability properties of RAC, Further modification by addition of polypropylene fibre can optimize the results.
Highlights
The recycling of concrete waste into recycled concrete aggregates (RCA) has been identified as a potential source of construction aggregates
The result shows that the inclusion of 60% untreated RCA to replace the coarse natural aggregate noticeably affects the compressive strength of the recycled aggregate concrete (RAC)
The results suggest that the development in the compressive strength of RAC that contains the treated coarse RCA can be enhanced by adding certain volume fraction of fibers
Summary
The recycling of concrete waste into recycled concrete aggregates (RCA) has been identified as a potential source of construction aggregates. The physical and mechanical properties of RCA are remarkably different from that of natural aggregates. RCA is composed of natural aggregates and a specific amount of adhered mortar that surrounds the original aggregate particles. The RCA compose of 65% to 70% natural aggregates is surrounded by 30% to 35% adhered mortar [4]. RCA properties are characterised by lower density, higher water absorption capacity, and lower strength compared with the natural aggregate [5,7,8].
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.
