Modeling the phase angle master curves of modified bituminous binders: estimating the plateau zone using heaviside step function

Author(s): Seyed Mohammad Asgharzadeh, N. Tabatabaee, K. Naderi, M. Partl
Paper category: Conference
Book title: Rheology and processing of Construction Materials – 7th RILEM International Conference on Self-Compacting Concrete and 1st RILEM International Conference on Rheology and Processing of Construction Materials
Editor(s): Nicolas Roussel and Hela Bessaies-Bey
Print ISBN: 978-2-35158-137-7
e-ISBN: 978-2-35158-138-4
Publisher: RILEM Publications SARL
Pages: 325-332
Total Pages: 8
Language: English

Phase angle master curves of modified binders in the linear viscoelastic range show more variations compared to the |G*| master curves. They were not however subjected to modeling purposes that much. In this research the Heaviside step function is combined with a Sine function to introduce a new model, capable of modeling the irregularities in the phase angle master curves of modified binders. Three neat and seven modified binders are used for validating the model. It is shown that the model is capable of predicting the plateau zone and fitting the master curves of modified binders in general. A comparison between the new model and another model recently generated based on the same approach is performed. It is shown that the new model is able to fit master curve irregularities at high temperature range while the old model is capable of modeling asymptotic behavior, especially at infinitely high frequencies.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00