Compound modification of asphalt with styrene-butadiene-styrene and waste polyethylene terephthalate functionalized additives

Padhan, Rabindra Kumar; Leng, Zhen; Sreeram, Anand; Xu, Xiong

doi:10.1016/j.jclepro.2020.124286

Cited by 42 publications

(25 citation statements)

References 23 publications

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“…17 Padham et al (2020) used this technique to monitor the aging of asphalts modified by the SBS polymer and observed that carbonyl and sulfoxide bands were formed in smaller amounts in the presence of the polymer. 18 Some studies used model compounds as references for the evaluation of the chemical reactions. 19,20 The study of model compounds allows evaluating, individually, the effect caused by each chemical group of molecules due to the aging process.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Through the FTIR analysis, variations in the functional groups present in the asphalt are monitored, especially the increase in the bands referring to carbonyl and sulfoxides . Padham et al (2020) used this technique to monitor the aging of asphalts modified by the SBS polymer and observed that carbonyl and sulfoxide bands were formed in smaller amounts in the presence of the polymer …”

Section: Introductionmentioning

confidence: 99%

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Study of Thermal Aging of Model Compounds Present in Asphalt Cement by GC/MS, ESI-MS, NMR, and FTIR

et al. 2021

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The study of petroleum asphalt cement (AC) aging is essential for the production of good quality pavements with high durability. Because of the complexity of this material, one of the biggest challenges is understanding the chemical variations that occur in the molecules present in the AC during the aging processes. This work proposes to study 15 standards of model compounds present in the AC composition, representing the fractions of saturated compounds (5-α-cholestane and hexatriacontane), aromatics (hexamethylbenzene, coronene, and benzo-[a]anthracene), nitrogenous compounds (acridine, carbazole, indole, and N,N′-Bis(3-pentyl)perylene-3,4,9,10-bis-(dicarboximide)), sulfur compounds (2-naphthalenethiol, 4,6diethyldibenzothiophene, and naphtho[1,2-b:6,5-b′]dithiophene(NDT)), and naphthenic acids (stearic (SA), pentadecanoic (PA), and sinapinic acids (ASN)), which were thermally aged by two methods: (i) they were subjected to a constant temperature of 80 °C, varying the time of analysis over 5, 10, 15, 30, and 60 days; and (ii) temperatures ranging from 80, 100, 120, to 140 °C for 15 days. The analyses of these compounds were performed by GC/MS, 1 H and 13 C NMR, ESI(−)MS (FT-ICR and LTQ), and FTIR. The results obtained showed that at 80 °C, from 15 days, only the indole standard compound showed the presence of thermal products, i.e., compounds detected from thermal aging of the standard model compounds. When the degradation temperature was increased from 100 to 140 °C, we observed the formation of thermal products at 100 °C in 6 out of 15 model compounds. However, at 140 °C, 12 of the 15 model compounds presented some type of degradation. Reactions of oxidation, polymerization, thermal aging, volatilization, and formation of double bonds were observed.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study of Thermal Aging of Model Compounds Present in Asphalt Cement by GC/MS, ESI-MS, NMR, and FTIR

et al. 2021

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“…The fatigue factor (G*·sin δ) is used to evaluate the fatigue resistance of SMB. The higher the G*·sin δ, the lower the fatigue resistance [ 30 , 31 ]. The frequency correlations of G*·sin δ at different temperatures (−10, 0, 10, and 20 °C) are demonstrated in Figure 7 .…”

Section: Resultsmentioning

confidence: 99%

SBS Modified Bitumen with Organic Layered Double Hydroxides: Compatibility and Aging Effects on Rheological Properties

et al. 2021

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SBS-modified bitumen (SMB) is susceptible to aging, which seriously influences its service performance and life. In order to strengthen the anti-aging ability of SMB, triethoxyvinylsilane was designed to organically modify layered double hydroxides (LDHs) and was applied to modify SMB. The dispersibility and storage stability of LDHs in SMB were markedly enhanced after triethoxyvinylsilane organic modification, and the compatibility and storage stability of SBS in bitumen were simultaneously enhanced. Compared with SMB, the introduction of LDHs and organic LDHs (OLDHs) could ameliorate the high-temperature properties of SMB, and the thermostability of SBS in bitumen at a high temperature was also distinctly improved, especially OLDHs. After aging, due to the oxidation of molecular bitumen and the degradation of molecular SBS, SMB became hardened and brittle, and the rheological properties were significantly deteriorated, which had serious impacts on the performance of SMB. LDHs can mitigate the detriment of aging to bitumen and SBS, and the deterioration of the rheological properties of SMB is obviously alleviated. As a result of the better dispersibility and storage stability, OLDHs exerted superior reinforcement of the anti-aging ability of SMB.

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“…Naphthenic-aromatic fractions are composed of naphthenic aromatic rings that can be linked to aliphatic groups . Resins and asphaltenes correspond to polar groups, with the presence of heteroatoms such as oxygen, in the form of ketones, alcohols, phenols, anhydrides, carboxylic acids, and sulfoxides . Nitrogen compounds are found as pyrrole, indole, carbazole, and pyridine groups .…”

Section: Introductionmentioning

confidence: 99%

“…Asphaltenes correspond to the highest apparent M W fraction of oils and asphalt, being structures that contain fused aromatic rings, aliphatic side chains, and heteroatoms such as oxygen, nitrogen, and sulfur. , The interactions between heteroatoms (hydrogen bonding or dipole–dipole interactions) and possible π–π stacking interactions between aromatic rings are associated with the physical properties of petroleum and derivatives . As asphalts have hih contents of asphaltenes (about 10%) compared to heavy oils (about 6%) properties such as higher viscosity and density and lower elasticity are assigned to them …”

Section: Introductionmentioning

confidence: 99%

Characterization of Asphalt Aging by Analytical Techniques: A Review on Progress and Perspectives

2022

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This review describes the chemical composition of asphalt, which is relevant for the development of materials with higher quality and durability. Asphalt aging can occur in the short term (during machining and storage periods) and the long-term (during the time the pavement is exposed to the environment). To understand the effect of aging on the chemical and physical properties of asphalt, we reviewed the short-term (rolling-thin film oven test (RTFOT) and its variations) and long-term (pressure aging vessel (PAV) and its variations) aging methods and the effects of the sun’s ultraviolet radiation (Suntest and its variations). We also explored the main chemical reactions that occur in the aging processes, such as oxidation, polymerization, and aromatization. For a more accurate assessment of the classes of compounds that undergo aging reactions, fractionation techniques have been developed over the years, such as separation of asphalt into saturates, naphthenic-aromatics, resins, asphaltenes, organic sulfides, nitrogenates, and oxygenates, among others. Despite several studies on the theme of asphalt aging, it is still necessary to understand the phenomena that occur in those processes.

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Compound modification of asphalt with styrene-butadiene-styrene and waste polyethylene terephthalate functionalized additives

Cited by 42 publications

References 23 publications

Study of Thermal Aging of Model Compounds Present in Asphalt Cement by GC/MS, ESI-MS, NMR, and FTIR

Study of Thermal Aging of Model Compounds Present in Asphalt Cement by GC/MS, ESI-MS, NMR, and FTIR

SBS Modified Bitumen with Organic Layered Double Hydroxides: Compatibility and Aging Effects on Rheological Properties

Characterization of Asphalt Aging by Analytical Techniques: A Review on Progress and Perspectives

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