Impact of the addition of Trinidad Lake Asphalt (TLA) on the rheological and mechanical behavior of two asphalt binders

Fengler, Ricardo Zardin; Osmari, Patrícia Hennig; Leite, Leni Figueiredo Mathias; Nascimento, Luís Alberto Herrmann do; Fritzen, Marcos Antonio; Aragão, Francisco Thiago Sacramento

doi:10.1080/14680629.2019.1633789

Cited by 14 publications

(7 citation statements)

References 24 publications

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“…Trinidad lake asphalt (TLA) is the world's most famous, widely used natural bitumen [11]. Physical and rheological properties of TLA-modified bitumen showed that TLA could help to improve the stiffness [12], high-temperature stability [13], and low-temperature-induced cracks [14] of bitumen. Yang et al investigated the high-temperature properties of TLA modified asphalt, and the results indicated that the modified asphalt had higher resistance to rutting deformation [15].…”

Section: Introductionmentioning

confidence: 99%

On the Use of Recycled Asphalt and Trinidad Lake Asphalt (TLA) for the Preparation of High Modulus Asphalt Concrete

Li¹,

Zeng²,

Fang³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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Rutting of asphalt pavement occurs earlier and is more serious under the increasingly heavy traffic load conditions that can be found in subtropical monsoon climate regions. High modulus asphalt concrete (HMAC) with excellent anti-rutting and anti-fatigue properties is generally used to mitigate this issue. Given the relatively high cost of the additives used in this type of asphalt, in this study the feasibility of using recycled asphalt mixture (RAP) and Trinidad lake asphalt (TLA) for the preparation of HMAC is considered. The mineral composition of the RAP is first analyzed, then the TLA modified asphalt with different levels of RAP content is used to assess the effect of RAP on the performance of the mixture. Finally, the high-temperature rheological properties of extracted bitumen and the adhesion characteristic between mineral and bitumen are analyzed. The results show that after RAP combustion, the yellowish and greyish minerals display different alkalinity values, while the greyish mineral exhibits an improved ability to combine with bitumen. Thus, RAP can significantly enhance the high-temperature rutting resistance of TLA modified asphalt mixtures. The aged bitumen in RAP makes the mixed binder harder and improves its rheological properties at high temperatures.

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Section: Introductionmentioning

confidence: 99%

On the Use of Recycled Asphalt and Trinidad Lake Asphalt (TLA) for the Preparation of High Modulus Asphalt Concrete

Li¹,

Zeng²,

Fang³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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“…It consists of a semi-solid emulsion of soluble bitumen, mineral matter, and other minor constituents. TLA is well known for its consistent properties, high viscosity and density, superior rheological properties, and effective blending with other bitumen [ 7 , 8 ]. Furthermore, TLA has good temperature stability (low penetration and high softening point), chemical stability (good oxidation resistance), and water stability (good adhesivity), as well as good compatibility with petroleum bitumen due to their similar chemical compositions [ 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…TLA-modified binders present increased stiffness, mechanical strength, elastic modulus, and tensile stress; enhanced Marshall stability and adhesion; less tendency toward thermal susceptibility; lower solubility in solvents; less resistance to low-temperature cracking [ 9 , 15 , 16 , 17 , 18 , 19 ]. Many researchers investigated the rheological properties of TLA-modified binders [ 8 , 9 , 16 , 17 , 20 , 21 ]. Their results indicated that the addition of TLA into base bitumen significantly improved its rutting resistance, which is usually related to high-temperature performance.…”

Section: Introductionmentioning

confidence: 99%

“…Słowik and Bilski [ 25 ] revealed that the unfavorable impact of the aging process on the TLA-modified binder properties is limited if a suitable TLA content is used; they propose the optimal TLA content of 15% by weight to modify the 35/50 and 50/70 penetration grade bitumen. Fengler et al [ 8 ] demonstrated that, as the TLA content and the aging time increased, the binder showed a tendency to present accentuated cracking. Furthermore, the stiffness considerably increased after long-term aging when using the 50% TLA-modified binders, which led the material to exhibit block cracking.…”

Section: Introductionmentioning

confidence: 99%

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Effects of Aging on the Physical and Rheological Properties of Trinidad Lake Asphalt Modified Bitumen

2021

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The application of various modifiers has emerged in recent years to improve conventional petroleum-based bitumen properties. The natural asphalt called Trinidad Lake Asphalt (TLA) has been applied very often due to its consistent properties, high viscosity and density, and superior rheological properties, and effective blending with other bitumen. However, most studies on TLA-modified binders always focused on physical and rheological properties in the original (unaged) condition, but the details about aging properties are often neglected. This study aimed to investigate the effect of short-term aging on the physical and rheological characteristics of the 35/50 base bitumen modified by the addition of two different TLA contents. The conventional physical tests and dynamic shear rheological tests were undertaken before and after aging to measure the penetration and softening point, complex shear modulus, and phase angle of the modified binders, as well as to calculate the zero shear viscosity using the Cross model fitting procedure. Based on the results of the above-mentioned comprehensive testing, the effect of aging on TLA-modified binder properties was evaluated using aging indices, as well as a direct comparison of results. The tests revealed that the short-term aging of TLA-modified binders did not worsen or reduce the pavement resistance to permanent deformation or the load-bearing capacity of the asphalt mixture.

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“…The most important advantages of using TLA as a bitumen modifier include optimization of structural properties of the binder (lower brittleness and greater resistance to ageing), improvement of binder adhesion to mineral material, significant improvement of workability and compaction of the mixture, and ultimately, its higher resistance to permanent deformation and fatigue [ 8 ]. High-quality MA pavement with the TLA-modified binder has been successfully applied for many years on hundreds of bridges worldwide [ 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Zero Shear Viscosity of TLA-Modified Binder and Mastic Composition on the Permanent Deformation Resistance of Mastic Asphalt Mixture

2021

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Mastic asphalt (MA) has been particularly popular in recent years for bridge pavements due to many advantages such as easy application, good waterproofing properties, and high durability. However, the drawback of mastic asphalt in comparison to other asphalt mixtures is its lower resistance to permanent deformation. Trinidad Lake Asphalt (TLA) is often applied to make mastic asphalt resistant to permanent deformation. Practical experience demonstrates that serious failures may occur if MA pavement design and materials selection is not taken into account sufficiently. Therefore in this study, the influence of two parameters: zero shear viscosity (ZSV) of TLA-modified binder and mastic composition described by the filler–binder ratio, on the permanent deformation resistance of the MA mixture was evaluated. The primary purpose of determining the ZSV of the TLA-modified binders was to evaluate the rutting potential of the binders. The permanent deformation (rutting) resistance of the MA mixtures was evaluated based on static and dynamic indentation tests. The optimum content of TLA in the base bitumen and the optimum filler–binder ratio in the MA mixture were obtained based on multiple performance evaluations for modified binder, mastic and MA mixtures, i.e., 20% and 4.0, respectively.

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Impact of the addition of Trinidad Lake Asphalt (TLA) on the rheological and mechanical behavior of two asphalt binders

Cited by 14 publications

References 24 publications

On the Use of Recycled Asphalt and Trinidad Lake Asphalt (TLA) for the Preparation of High Modulus Asphalt Concrete

On the Use of Recycled Asphalt and Trinidad Lake Asphalt (TLA) for the Preparation of High Modulus Asphalt Concrete

Effects of Aging on the Physical and Rheological Properties of Trinidad Lake Asphalt Modified Bitumen

The Influence of Zero Shear Viscosity of TLA-Modified Binder and Mastic Composition on the Permanent Deformation Resistance of Mastic Asphalt Mixture

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