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Quantification of Aging of Polymer Modified Binder Using Creep Recovery and Yield Energy Test Methods
Journal
Lecture Notes in Civil Engineering
ISSN
23662557
Date Issued
2023-01-01
Author(s)
Suchismita, Arpita
Singh, Dharamveer
Abstract
In the present study, multiple stress creep recovery (MSCR) test and binder yield energy test (BYET) have been used to quantify the intensity of aging of an SBS polymer modified binder (PMB). Three different long-term aging levels, i.e., 20 h pressure aging vessel cycles (1CPAV), 40 h (2CPAV), 60 h (3CPAV), were selected to simulate the range of field aging behavior of modified binder. The MSCR results showed that with an increase in the cycles of aging, the percentage recovery of PMB increases. However, this enhanced recovery behavior of the binder is attributed to the increase in viscosity of base binder due to oxidative hardening and the degraded polymer network with aging has a minimal role to play. Thus, it can be concluded recovery parameter obtained from the standard MSCR test condition may not be suitable to judge the aging intensity of SBS PMB subjected to different aging cycles. On the contrary, BYET results showed a reduction in elastic recovery with an increase in aging cycles. Therefore, BYET-ER is a better parameter to quantify aging, particularly for SBS PMB.
Volume
271
Subjects