Probing the modification mechanism of and customized processing design for SBS-modified asphalts mediated by potentiometric titration

Liang, Bo; Shi, Kai; Niu, Yanfang; Liu, Zhengchun; Zheng, Jianlong

doi:10.1016/j.conbuildmat.2019.117385

Cited by 18 publications

(2 citation statements)

References 38 publications

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“…Asphalt modified with polymers has a long history because polymers can improve the physical and rheological performance of asphalt. The triblock copolymer styrenebutadiene-styrene (SBS) can remarkably enhance the high-temperature rutting resistance and low-temperature cracking resistance of a matrix asphalt simultaneously, and is the most widely used modifier for asphalt [1]. However, SBS-modified asphalt faces several challenges, including poor aging resistance caused by the presence of double bonds in the backbone and high costs [2,3].…”

Section: Introductionmentioning

confidence: 99%

Probing the Effect of Linear and Crosslinked POE-g-GMA on the Properties of Asphalt

Zhang,

Qian,

Xiao

et al. 2023

Materials

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The copolymer ethylene–octene (POE) has good aging resistance and is an inexpensive asphalt additive compared to the styrene–butadiene–styrene copolymer (SBS). However, POE is easy to segregate in asphalt during storage at high temperatures. Grafting glycidyl methacrylate (GMA) onto the molecular backbone of POE (i.e., POE-g-GMA) may solve this problem, for the epoxy groups in GMA can react with the active groups in asphalt. Asphalt modified with linear and crosslinked POE-g-GMA were prepared, and the hot storage stability, physical properties and thermal oxidation aging properties were discussed in detail. The results show that linear and low-degree crosslinked POE-g-GMA-modified asphalts are storage-stable at high temperatures via measurements of the difference in softening points and small-angle X-ray scattering (SAXS) characterizations from macro and micro perspectives. The difference in softening points (ΔSP) between the upper and lower ends is no more than 3.5 °C for modified asphalts after 48 h of being in an oven at 163 °C. More importantly, the crosslinking modification of POE-g-GMA can further increase the softening point and reduce the penetration as well as rheological properties via conventional physical property, dynamic shear rheometer (DSR) and multiple-stress creep recovery (MSCR) tests. Furthermore, asphalt modified with crosslinked POE-g-GMA reveals better aging resistance via measurements of the performance retention rate and electron paramagnetic resonance (EPR) characterizations after a rolling thin film oven test (RTFOT). This work may provide further guidelines for the application of polymers in asphalt.

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Section: Introductionmentioning

confidence: 99%

Probing the Effect of Linear and Crosslinked POE-g-GMA on the Properties of Asphalt

Zhang,

Qian,

Xiao

et al. 2023

Materials

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“…To rapidly detect SBS content, gel permeation chromatography (GPC), [ 15 ] Fourier‐transform infrared spectroscopy (FTIR), [ 16 ] nuclear magnetic resonance (NMR), [ 17 ] fluorescence microscopy (FM), [ 18 ] thermogravimetric analysis (TG), [ 19 ] chemical titration, potentiometric titration, [ 20 ] artificial neural network, and other methods have been widely used. Kui et al [ 21,22 ] established the fitting model between the characteristic peak area of SBS and SBS content using FM; however, this method could easily be affected by human factors and exhibited significant deviation.…”

Section: Introductionmentioning

confidence: 99%

Quantitative detection of polymer content in styrene‐butadiene‐styrene modified asphalt after aging

Que

Wang

et al. 2022

Polymer Engineering & Sci

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The identification of styrene-butadiene-styrene (SBS) content is crucial in engineering applications since the key to assessing the performance of agedmodified asphalt is the SBS content. Six types of modified asphalts with various SBS contents were prepared, and physical, rheological, and Fourier-transform infrared spectroscopy (FTIR) tests were conducted. The fitting relationship between aged-modified asphalt indexes and SBS content was established, and the three methods' accuracy, simplicity, and efficiency were compared and analyzed. The results showed that the fitting relationship between SBS content and viscosity could exceed 0.83 after aging. However, the linear and quadratic fittings deviated from the measured values, and the softening point had no apparent law with the SBS content. The rheological index method significantly correlated with SBS content and is highly automated. However, FTIR was established based on the direct detection of SBS characteristic peaks compared with the physical and rheological indexes methods. It could directly reflect the SBS content and was not easily disturbed by SBS substitutes. In addition, after long-term aging, the linear relationship between SBS characteristic peak index, A 966 /A 811 , and SBS content could exceed 0.97. The FTIR test exhibited high accuracy and fast detection speed and is the best detection method for SBS content.

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EVA Effect on Stone Mastic Asphalt (SMA) Behaviour

Chegenizadeh

Tokoni

Nikraz

et al. 2022

Environmental Science and Engineering

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Probing the modification mechanism of and customized processing design for SBS-modified asphalts mediated by potentiometric titration

Cited by 18 publications

References 38 publications

Probing the Effect of Linear and Crosslinked POE-g-GMA on the Properties of Asphalt

Probing the Effect of Linear and Crosslinked POE-g-GMA on the Properties of Asphalt

Quantitative detection of polymer content in styrene‐butadiene‐styrene modified asphalt after aging

EVA Effect on Stone Mastic Asphalt (SMA) Behaviour

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