Mechanical properties and post-crack behaviours of recycled PP fibre reinforced concrete

Yin, Shi, Tuladhar, Rabin, Collister, Tony, Combe, Mark, and Sivakugan, Nagaratnam (2015) Mechanical properties and post-crack behaviours of recycled PP fibre reinforced concrete. In: Proceedings of the 27th Biennial National Conference of the Concrete Institute of Australia, pp. 414-421. From: Concrete 2015: 27th Biennial National Conference of the Concrete Institute of Australia, 30 August - 2 September 2015, Melbourne, VIC, Australia.

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Abstract

Plastic macro fibres, inclusive of virgin and recycled plastic fibres, are becoming more popular in the construction of concrete footpaths, precast panels and shotcrete mine tunnels. In particular, the use of recycled plastic fibres has become increasingly attractive due to their low cost and sustainability. However, due to their production and service history, the recycled plastic fibres normally have lower mechanical properties than the virgin plastic fibres. Therefore, the feasibility of using recycled plastic fibres in concrete may be in doubt. This research assessed reinforcing effects of the recycled Polypropylene (PP) fibre and compared it with those of the virgin PP fibre. Crack mouth opening displacement (CMOD) and round determinate panel test (RDPT) were carried out to assess the postcracking behaviours of the recycled PP fibre reinforced concrete. The results showed that the recycled PP fibre produced by the same process as the virgin PP fibre obtained lower tensile strength but higher Young’s modulus than the virgin PP fibre. Although the recycled PP fibre had lower tensile strength, in the CMOD and RDPT the recycled PP fibre showed comparable reinforcement to the virgin PP fibre owing to its higher Young's modulus.

Item ID: 40556
Item Type: Conference Item (Research - E1)
ISBN: 978-1-943847-70-9
Keywords: recycled PP fibre, fibre reinforced concrete, mechanical properties, CMOD, RDPT
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Date Deposited: 22 Mar 2016 03:50
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090503 Construction Materials @ 50%
09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 50%
SEO Codes: 87 CONSTRUCTION > 8703 Construction Materials Performance and Processes > 870301 Cement and Concrete Materials @ 40%
87 CONSTRUCTION > 8702 Construction Design > 870201 Civil Construction Design @ 30%
87 CONSTRUCTION > 8703 Construction Materials Performance and Processes > 870303 Polymeric Materials (e.g. Paints) @ 30%
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