Fiber preparation and mechanical properties of recycled polypropylene for reinforcing concrete

Yin, Shi, Tuladhar, Rabin, Shanks, Robert A., Collister, Tony, Combe, Mark, Jacob, Mohan, Tian, Ming, and Sivakugan, Nagaratnam (2015) Fiber preparation and mechanical properties of recycled polypropylene for reinforcing concrete. Journal of Applied Polymer Science, 132 (16). pp. 1-10.

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View at Publisher Website: http://dx.doi.org/10.1002/APP.41866
 
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Abstract

Polypropylene (PP) fibers have been widely used to reinforce concrete footpaths as an alternative to steel mesh. The reinforcing effect of the PP fiber is directly proportional to its tensile strength and Young modulus. This research explored the feasibility of using an improved melt spinning and hot drawing process to produce virgin and recycled PP fibers of high mechanical properties in an industrial scale. Commercial grade granules of virgin PP, recycled PP and HPDE were mixed in different proportions in preparing five different types of fibers. All the fibers obtained high tensile strength and Young modulus. A relationship between the structural parameters and mechanical properties was then established. It was observed that the melt spinning and hot drawing process formed both α-form and β-form crystals in the PP fibers, and significantly improved crystallinity from about 50% to 80%.

Item ID: 37125
Item Type: Article (Refereed Research - C1)
Keywords: crystallization; differential scanning calorimetry; manufacturing; mechanical properties; recycled PP fiber
ISSN: 1097-4628
Date Deposited: 19 Mar 2015 23:48
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090506 Structural Engineering @ 40%
09 ENGINEERING > 0912 Materials Engineering > 091209 Polymers and Plastics @ 30%
09 ENGINEERING > 0905 Civil Engineering > 090503 Construction Materials @ 30%
SEO Codes: 87 CONSTRUCTION > 8703 Construction Materials Performance and Processes > 870301 Cement and Concrete Materials @ 50%
87 CONSTRUCTION > 8703 Construction Materials Performance and Processes > 870399 Construction Materials Performance and Processes not elsewhere classified @ 50%
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