Rheology of conventional asphalt modified with SBS, Elvaloy and polyphosphoric acid

Jasso, Martin; Hampl, Rudolf; Vacin, O; Bakoš, Dušan; Stastna, Jiri; Zanzotto, Ludo

doi:10.1016/j.fuproc.2015.09.002

Cited by 112 publications

(52 citation statements)

References 35 publications

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“…Reactive terpolymers are the polymers containing functional groups which can form chemical bonds with some bitumen components. These polymers form a network around the asphaltenes in the bitumen to form an integral compound and produce a chemical reaction with the bitumen [17,18,19,20,21,22,23]. However, when these chemical bonds occur, a polymer bitumen gel may be formed which in this case does not have melting and dissolving properties and is completely useless [18,19,22].…”

Section: Introductionmentioning

confidence: 99%

“…These polymers form a network around the asphaltenes in the bitumen to form an integral compound and produce a chemical reaction with the bitumen [17,18,19,20,21,22,23]. However, when these chemical bonds occur, a polymer bitumen gel may be formed which in this case does not have melting and dissolving properties and is completely useless [18,19,22]. Therefore, it is desirable that the amount of terpolymer to be used in its modification has an upper limit to remain below the chemical gel point of the network [18,19,21].…”

Section: Introductionmentioning

confidence: 99%

“…However, when these chemical bonds occur, a polymer bitumen gel may be formed which in this case does not have melting and dissolving properties and is completely useless [18,19,22]. Therefore, it is desirable that the amount of terpolymer to be used in its modification has an upper limit to remain below the chemical gel point of the network [18,19,21]. In some studies, this limit is considered to be 2–2.5% by weight, although it is stated that it may be less than 1% [19,22].…”

Section: Introductionmentioning

confidence: 99%

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Physical, Chemical, Microstructural and Rheological Properties of Reactive Terpolymer-Modified Bitumen

Geçkil

2019

Materials

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In this study, the change in the physical, chemical, microstructural, and rheological properties of a road bitumen modified with reactive terpolymer (Elvaloy®RET) was investigated. For this purpose, four different Elvaloy®RET percentages (0%, 0.4%, 0.8%, and 1.2% by wt.) were mixed with B 160/220 bitumen. Firstly, the obtained samples were subjected to a short and long-term aging process using a rotating thin-film oven test and pressurized aging vessel, respectively. Then, the engineering characteristics of the samples were investigated using X-ray diffraction, scanning electron microscopy, and conventional and Superpave bitumen tests. The results showed that Elvaloy®RET reacted with the main macromolecular groups in the bitumen, and that the modified bitumens behaved as a homogenous single phase structure as a result of this reaction. Conventional tests showed that Elvaloy®RET-modified bitumens were much harder than pure bitumen and had better aging resistance. Furthermore, the penetration classes of these bitumens changed and their temperature sensitivities decreased significantly. Rheological tests showed that the Elvaloy®RET additive increased the resistance of the bitumen against fatigue cracking and particularly permanent deformation. Moreover, the high temperature performance class of the bitumen also increased. However, parallel to the hardening of the bitumen, a reduction in its resistance to cracking at low temperature was observed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Physical, Chemical, Microstructural and Rheological Properties of Reactive Terpolymer-Modified Bitumen

Geçkil

2019

Materials

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“…A single factor test was used to determine the influence of SBS, NO, and bioasphalt on the performance of the original asphalt. After blending with SBS, bioasphalt, and NO separately, the technical indexes of the asphalt blends were evaluated using the following test methods: penetration, softening point, ductility (at 5°C), and Brookfield viscosity (at 135°C) [27]. Based on the single-factor test results, the content range of each influencing factor was then determined for the orthogonal-factor experimentation to evaluate and quantify the interactive effects of the asphalt blends.…”

Section: Experimental Design and Test Methodsmentioning

confidence: 99%

“…e penetration, ductility, softening point, and apparent viscosity results are plotted in Figure 1. It has been reported in the literature that the apparent viscosity at 135°C [27] is an indicator of favorable workability for the asphalt. According to SHRP [26], the maximum apparent viscosity of 3 Pa•s is specified.…”

Section: Sbs Effects On the Originalmentioning

confidence: 99%

Preparation and Performance Characterization of Warm‐Mix Rejuvenated Bioasphalt

Zhang

Zhen-jun

et al. 2020

Advances in Civil Engineering

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Reclaimed asphalt pavement (RAP) material is generally under a large amount of aged asphalt coated on the surface of the aggregates, which often limits its (RAP) wide application. Bioasphalt is a renewable material with constituent components that are comparable to regular petroleum asphalt and has the potential to rejuvenate the performance of the aged asphalt in RAP materials. In this laboratory study, the optimum bioasphalt dosage for rejuvenating and optimizing warm-mix rejuvenated bioasphalt (WBA) performance, in the presence of styrene-butadiene-styrene (SBS) and naphthenic oil additives, was investigated. The laboratory test results of the single-factor and orthogonal experiment indicated that the optimal dosage of bioasphalt in WBA was 30% at 4% SBS and 10% naphthenic oil, respectively. The test results further indicated that the WBA’s ductility properties were highly responsive to the bioasphalt dosage. Naphthenic oil, on the other hand, had the greatest impact on the WBA fluidity. Likewise, the Brookfield viscosity experimentation showed that the fluidity of WBA and aged asphalt with different contents at 30%, 40%, 50%, 60%, and 70%, respectively, satisfactorily met the Chinese construction requirements. The adhesion test indicated excellent adhesion and good moisture stability properties for WBA. The resultant PG grades of WBA blended with 40% and 70% aged asphalt were PG 64-34 and PG 70-22, respectively. Microstructure and surface morphology analysis showed carbonyl absorption peaks with high rejuvenation and surface-crack repair potential for the WBA over the control asphalt that was evaluated in the study.

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Research for SEBS/PPA compound‐modified asphalt

Zhang¹,

Zhang²

2017

J of Applied Polymer Sci

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In this study, polyphosphoric acid (PPA) was used to modify styrene-ethylene/butylene-styrene (SEBS)-modified asphalt further and decrease the SEBS content in asphalt. Different structural analysis methods including morphology observation, infrared spectroscopy, thermal analysis were used to investigate the structural characteristics of asphalt modified by SEBS or PPA before and after short-or long-term thermal ageing. The study shows the suitable addition of PPA can improve the major physical and rheological properties of SEBS-modified (SM) asphalt and the improved properties became more obvious with further ageing. 0.8 wt % PPA can replace 2 wt % SEBS in the modification. Morphology observation showed PPA increased the incompatibility between SEBS and asphalt. Thermal analysis showed PPA changed the energy consumption and mass loss of SM asphalt greatly at elevated temperatures and led to the more complex structural characteristics.

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Rheology of conventional asphalt modified with SBS, Elvaloy and polyphosphoric acid

Cited by 112 publications

References 35 publications

Physical, Chemical, Microstructural and Rheological Properties of Reactive Terpolymer-Modified Bitumen

Physical, Chemical, Microstructural and Rheological Properties of Reactive Terpolymer-Modified Bitumen

Preparation and Performance Characterization of Warm‐Mix Rejuvenated Bioasphalt

Research for SEBS/PPA compound‐modified asphalt

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