Long-Term Behavior Prediction of HDPE Containing Postconsumer Recycled Material Using Stepped Isostress Method
Publication: Journal of Materials in Civil Engineering
Volume 34, Issue 10
Abstract
To predict the long-term behavior of high-density polyethylene (HDPE) drainage pipes, HDPE coupon specimens with 0%, 49%, and 98% postconsumer recycled (PCR) material content were loaded incrementally in tension following the stepped isostress method (SSM) to establish their master creep curves. A reference stress of 15% ultimate tensile strength and a dwell time of 24 h were used. The 0% and 49% PCR content specimens elongated by more than 600%, whereas the 98% PCR content specimen elongated much less and broke a few minutes after adding the final load. The trend of the SSM shift factors in terms of creep stress agreed with the Eyring equation for all the HDPE coupon specimens. From the rupture time results, it was shown that as the percentage of recycled material increased, the coupon ruptured faster. The maximum percentage of recycled material allowed in HDPE is interpolated at 57% (39%) for 50-year (75-year) service life and the corresponding linear notched constant ligament stress (NCLS) failure time is interpolated at 15.2 h (21 h).
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
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Published In
Journal of Materials in Civil Engineering
Volume 34 • Issue 10 • October 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Oct 29, 2021
Accepted: Feb 3, 2022
Published online: Jul 22, 2022
Published in print: Oct 1, 2022
Discussion open until: Dec 22, 2022
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