Rubberised bitumen manufacturing assisted by rheological measurements

Subhy, Ayad; Presti, Davide Lo; Airey, Gordon

doi:10.1080/14680629.2015.1079549

Cited by 25 publications

(18 citation statements)

References 27 publications

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“…The addition of crumb rubber can considerably alter the mechanical properties of bitumens by acting both as an inert filler and as a dissolved polymer modifier [29,30]. Therefore, the two neat bitumens were modified by adding recycled tyre rubber in order to validate the proposed method on modified bitumens.…”

Section: Methodsmentioning

confidence: 99%

“…All tests were conducted at a single frequency of 10Hz using a 2mm gap with the 8 mm plate-plate testing geometry. The effect of gap size on the rheological measurements was investigated due to the presence of rubber particles, and a 2mm gap size has been shown to provide reliable and repeatable measurements [29]. Different testing temperatures were selected for bitumen H and its rubberised bitumen and for bitumen S and its rubberised bitumen to ensure high initial complex modules |G*| (higher than 15 MPa) so that edge effects or plastic flow can be eliminated and the binders fail due to "true" fatigue damage rather than "instability flow" [12].…”

Section: Testing Programmementioning

confidence: 99%

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New simplified approach for obtaining a reliable plateau value in fatigue analysis of bituminous materials

Subhy

Presti

Airey

2017

Engineering Failure Analysis

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Abstract:The Plateau Value (PV) based on the Ratio of Dissipated Energy Change (RDEC) approach has been proven to provide a unique relationship with the fatigue life, N f , independent of loading mode, temperature and frequency. In this paper, a new simplified approach is proposed to compute the unique energy parameter PV. The results of this study show that applying the proposed method allows a unique fatigue power law to be produced and eliminates the ambiguity and variability in calculating PV. However, the study also shows that the PV-N f fatigue curves for bituminous materials are dependent on material type which is contradictory to other studies dealing with PV. The study also highlights the importance of appropriately identifying the fatigue failure point prior to commencing any fatigue analysis.

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Section: Methodsmentioning

confidence: 99%

Section: Testing Programmementioning

confidence: 99%

New simplified approach for obtaining a reliable plateau value in fatigue analysis of bituminous materials

Subhy

Presti

Airey

2017

Engineering Failure Analysis

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“…In some studies, natural rubber had been used in a vulcanized state, e.g. tyre crumb, but this was difficult to disperse in bitumen (Pristi, 2013;Ragab et al 2016;Subhy et al 2016;Azahar et al 2016;Rossi et al 2017). Rubber modified bitumen is being evaluated as a promising binder with improved pavement performances, e.g.…”

Section: Introductionmentioning

confidence: 99%

Modification of 80-100 penetration grade bitumen

Ray

Bhuiyan

Islam

et al. 2019

Bangladesh J. Sci. Ind. Res.

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Bangladesh is facing severe problem in using 80-100 penetration grade bitumen for flexible pavement construction due to its high temperature susceptibility, e.g. lower penetration index, insufficient viscosity and lower moisture resistance. To improve these properties bitumen modification is essential. Present work describes the modification of general 80-100 penetration grade bitumen by incorporating natural rubber latex and an organic polymeric additive, polyaniline. Mixing parameters, such as amounts of natural rubber and polyaniline, mixing time and temperature and stirring speed were controlled and investigated carefully. Six bituminous aggregate binders were prepared by varying amounts of natural rubber latex into bitumen by wet process. Physical tests, e.g. penetration, softening point, ductility and viscosity were performed on all samples and compared with unmodified base bitumen. Modified bitumen samples showed better properties compared to ordinary 80-100 penetration grade bitumen. Spectral, thermal and scanning electron microscopic tests were performed on control and bitumen-natural rubber-polyaniline blend samples. Result showed better mixing efficiency of the constituents and thus improved physical, thermal and anti-stripping properties suitable for paving application in Bangladesh and like countries. All findings were discussed in details.

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“…Thus, a larger gap size can be used when testing those binders [3]. As a rough practical rule, the gap setting should be set at least 3 times higher than the maximum dimension of any particle in the matrix [25].…”

Section: Fig 1 the Dsr Testing Configurationmentioning

confidence: 99%

“…Therefore, characterizing the mechanical properties of binders and improving them by means of modification has been a topic of intensive studies for many years [1][2][3][4][5][6][7]. Testing only binders is deemed to be much easier and cost effective than asphalt mixtures.…”

Section: Introductionmentioning

confidence: 99%

Advanced analytical techniques in fatigue and rutting related characterisations of modified bitumen: Literature review

Subhy

2017

Construction and Building Materials

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Abstract:Fatigue and rutting are the two major failure distresses in flexible pavement that affect significantly the serviceability of pavement. The properties of bitumen have a direct effect on controlling the fatigue and rutting distresses. Because of the increase in vehicular loading and repetitions, the modification of neat bitumens becomes a widespread practice to improve their 2 mechanical properties. Any improvements obtained from developing modified binders need be reflected by fundamental testing parameters. The empirical testing methods and Superpave grading procedure that were developed mainly for unmodified bitumens have failed in many cases to predict the performance of modified bitumens. Evaluation the influence of such modifiers needs be based on characterising accurately the inherent resistance of binders to fatigue and rutting damage. The most advanced tests and fundamental analysis methods for characterising the fatigue and rutting properties of binders, are discussed and presented in this paper. These include fatigue and ductile fracture evaluation of binders using time sweep and double-edged notched tension (DENT) tests. For bitumen rutting evaluation, the SHRP rutting parameter, Shenoy rutting parameter, ZSV and MSCR are discussed. The dynamic shear rheometer (DSR) has been largely used to characterise fundamentally the viscoelastic properties of bitumens. A detailed description of the main elements associated with the DSR and Dynamic Mechanical Analysis (DMA) are also presented in this paper.

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Rubberised bitumen manufacturing assisted by rheological measurements

Cited by 25 publications

References 27 publications

New simplified approach for obtaining a reliable plateau value in fatigue analysis of bituminous materials

New simplified approach for obtaining a reliable plateau value in fatigue analysis of bituminous materials

Modification of 80-100 penetration grade bitumen

Advanced analytical techniques in fatigue and rutting related characterisations of modified bitumen: Literature review

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