ISSN: 1945-7553
Page Count: 8

Creep Test of Cured-In-Place Pipe Material Under Tension, Compression, and Bending

Straughan, WT
professor, Louisiana Tech University, Ruston,LA

Tantirungrojchai, N
Louisiana Tech University, RustonLA

Guice, LK
professor, Louisiana Tech University, Ruston,LA

Lin, H
Louisiana Tech University, RustonLA

(Received 20 May 1997; accepted 21 May 1998)

Abstract

Inexpensive and easily fabricated long-term creep test devices have been designed and built in order to identify the long-term creep behavior of cured-in-place pipe (CIPP) material under tension, compression, and bending. A special device for testing curved specimens has been designed, built, and evaluated. Loads were applied for 3000 h, and the deformations of CIPP specimens were recorded. Findley's equation, which has been successfully used to predict the creep behavior of plastics for more than 25 years, was used as a baseline for data analysis. The results from Findley's approach were compared with the results from the analyses by theoretical and log-fit methods. The comparison of the three approaches shows that the best estimation of 3000-h creep moduli can be obtained by using the log-fit method.

Keywords:
cured-in-place pipe (CIPP), pipeline rehabilitation, Findley's equation, long-term creep testing, log-fit method, plastics

Paper ID: JTE12118J
DOI: 10.1520/JTE12118J
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