Transitions in unmodified and modified bitumen using FTIR spectroscopy

Nivitha, M. R.; Prasad, Edamana; Krishnan, J. Murali

doi:10.1617/s11527-018-1308-7

Cited by 25 publications

(5 citation statements)

References 28 publications

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“…Another important absorption band is around 2912 cm −1 , which is due to the stretching vibration of methylene groups . The changes in this absorption of the methylene group as a function of the aging period are shown in Fig.…”

Section: Resultsmentioning

confidence: 96%

Comparison of the effects of heat and gamma irradiation on the degradation of cross‐linked polyethylene

Liu

Miyazaki

Hirai

et al. 2019

IEEJ Transactions Elec Engng

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For conducting comparative research, samples of cross-linked polyethylene (XLPE), made exactly in the same manner as those used in nuclear power plants, were aged in two ways: purely thermally, and concurrently with heat and γ -irradiation, for long periods up to 2000 h. They were then examined by an indenter, mid-infrared absorption spectroscopy, broadband dielectric spectroscopy, and measuring the electrical conductivity. As a result, it became clear that the effect of radiation is more dominant than that of heat on the oxidation or carbonyl formation in XLPE. However, heat is a more determining factor on the surface hardness of XLPE. In addition, the complex permittivity of XLPE increases as a result of the appearance of abundant carbonyl groups. Both the carbonyl index and indenter modulus can be indicators of aging.

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Section: Resultsmentioning

confidence: 96%

Comparison of the effects of heat and gamma irradiation on the degradation of cross‐linked polyethylene

Liu

Miyazaki

Hirai

et al. 2019

IEEJ Transactions Elec Engng

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“…Recently, Nivitha et al used VT-FTIR at above-ambient and ambient temperatures to observe the shifting of functional CH 2 peaks to study solid-to-solid transition processes in the asphalt binder. Many spectral processes and phenomena exist at room temperature and higher that are mixed and therefore cannot be observed or distinguished due to these interactions or due to the thermal broadening of the transition spectrum.…”

Section: Materials and Experimental Methodsmentioning

confidence: 99%

Balancing the Use of Wax-Based Warm Mix Additives for Improved Asphalt Compaction with Long-Term Pavement Performance

Ding

Hesp

2021

ACS Sustainable Chem. Eng.

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Using wax-based warm mix additives allows contractors to lower production and compaction temperatures of asphalt, thereby reducing greenhouse and other harmful gas emissions in pavement construction. However, excessive wax can adversely affect the long-term durability of the pavement. In order to quantify solid wax, the effects of selected commercial additives on spectral and thermal properties of asphalt binder were studied by variable-temperature Fourier-transform infrared spectroscopy (VT-FTIR) and differential scanning calorimetry (DSC). The VT-FTIR reduced spectral area versus temperature plots for waxdoped asphalt binder were found to have three distinct parts from which solid wax contents could be determined. The wax precipitation temperature (WPT), obtained from DSC measurements of heat flow during cooling, was found to increase with additive content. In contrast, the wax melting out temperature (WMT), determined upon heating, appears to be independent of the additive content.

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“…Padmarekha and Krishnan [2] captured the viscoelastic solid-fluid transition in the temperature range of 20 to 70 ⁰ C using linear viscoelastic parameters. Nivitha et al [8] studied the temperature sensitivity of the bitumen using Fourier transform infrared (FTIR) spectroscopy and observed viscoelastic solid-fluid transformation in the temperature range of 35 to 65 ⁰𝐶. The time-temperature superposition principle (TTSP) has been widely applied to predict the response of bitumen at any temperature if the response of the bitumen at a reference temperature is known.…”

Section: Introductionmentioning

confidence: 99%

Application of the Arrhenius Equation in Predicting the Temperature Susceptibility of Unmodified and Modified Bituminous Binder

Srikanth,

Padmarekha

2024

Civ Eng J

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Bitumen is a temperature-susceptible material. The performance of the bitumen largely depends on the sensitivity of its characteristic properties to the variation in temperature. This paper uses the Arrhenius equation to predict the temperature-sensitive properties of various bitumens. Three modified and unmodified binders of various grades were tested under study shear, frequency mode (oscillatory shearing), and time mode (multiple stress creep and recovery) at different temperatures from 10 to 70ºC. This paper focuses on the activation energy to understand the temperature-susceptible behavior of the bitumen and the influence of aging on the bitumen. To analyze the temperature susceptibility of the bitumen, Steady shear, MSCR, and LAOS tests were performed. From these tests, parameters such as viscosity, dynamic modulus, energy dissipation, and creep compliance at different temperatures were observed to follow the Arrhenius equation. The activation energy constant of the Arrhenius equation is found to vary with the characteristic function used. It is also statistically proven that the activation energy depends on the shear rate or shear stress, indicating that the temperature-susceptible properties of the bitumen are shear rate-dependent. Also, as the bitumen ages, its temperature-susceptible properties improve. Doi: 10.28991/CEJ-2024-010-03-015 Full Text: PDF

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Transitions in unmodified and modified bitumen using FTIR spectroscopy

Cited by 25 publications

References 28 publications

Comparison of the effects of heat and gamma irradiation on the degradation of cross‐linked polyethylene

Comparison of the effects of heat and gamma irradiation on the degradation of cross‐linked polyethylene

Balancing the Use of Wax-Based Warm Mix Additives for Improved Asphalt Compaction with Long-Term Pavement Performance

Application of the Arrhenius Equation in Predicting the Temperature Susceptibility of Unmodified and Modified Bituminous Binder

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