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Meng Y, Fang G, Hu Y, Qin Y, Xu R, Yang F, Lei J, Zhang C. Study on the effect of different aldehyde modifiers on the fume suppression effect, mechanism and road performance of SBS modified asphalt. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 912:169162. [PMID: 38072257 DOI: 10.1016/j.scitotenv.2023.169162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2023] [Revised: 11/15/2023] [Accepted: 12/05/2023] [Indexed: 01/18/2024]
Abstract
In order to curb asphalt fume emissions during the heating process of styrene-butadiene-styrene (SBS) asphalt, three aldehyde modifiers [vanillin (X), citral (N) and amyl cinnamaldehyde (J)] were blended into SBS-modified asphalt to prepare aldehyde-modified asphalt in this paper. By collecting solid particles and volatile organic compounds (VOCs) in asphalt fumes to conduct relevant experiments, we have analyzed the fume suppression effect and suppression mechanism of aldehyde modified asphalt, and finally examined the road performance of aldehyde modifiers with the best fume suppression effect. It was found that the average VOCs concentration of aldehyde modified asphalt was reduced by about 78 % after 30 min. Aldehyde modifiers significantly reduce the compositional type and content of VOCs in SBS asphalt and reduce the risk of carcinogenicity by curbing the emission of substances such as benzene and phenol. J asphalt reduced solid particle emissions from SBS asphalt fume by 31.4 % and outperformed both X and N asphalt in inhibiting the escape of solid particulate matter and carcinogens from asphalt fume. Polymer networks and the cross-linking of chemical molecules are the main reasons for inhibiting the escape of asphalt fume molecules. In addition, the J modifier enhanced the high-temperature stabilization and water-stability properties of asphalt mixtures, but slightly reduced the low-temperature cracking resistance. The results showed that the three aldehyde modifiers were effective in inhibiting the volatilization of fumes from SBS modified asphalt. Among them, with the best effect of curbing fume emissions and a better road performance, J-modified asphalt is promising for the application in asphalt fume prevention and emissions reduction, and provides a new solution to reduce construction pollution and physical harm caused by asphalt fume in the construction process.
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Affiliation(s)
- Yongjun Meng
- College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; Key Laboratory of Disaster Prevention and Engineering Safety of Ministry of Education, Nanning 530004, China; National High Performance Computing Center Nanning Branch, Nanning 530004, China; Special Geological Highway Safety Engineering Technology Research Center of Guangxi, Nanning 530004, China.
| | - Guipeng Fang
- College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
| | - Yirong Hu
- College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China; GuangDong LongDa Superhighway Maintenance CO., LTD, Guangzhou, Guangdong 510030, China
| | - Yue Qin
- College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China.
| | - Ruiguang Xu
- Architectural Planning & Design Group Co., LTD, Nanning, Guangxi 530026, China
| | - Fengyu Yang
- College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China
| | - Jiechao Lei
- Guangxi Key Lab of Road Structure and Materials, Guangxi Transportation Science and Technology Group Co., Ltd, Nanning, Guangxi 530007, China
| | - Chunyu Zhang
- College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China.
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Deller Z, Grist S, Giustozzi F, Maniam S. Multimethod Approach to Investigate the Factors Influencing High-Temperature Fuming of Bitumen. ACS OMEGA 2024; 9:3217-3228. [PMID: 38284018 PMCID: PMC10809709 DOI: 10.1021/acsomega.3c04673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 10/08/2023] [Accepted: 11/23/2023] [Indexed: 01/30/2024]
Abstract
Bitumen is heated at high temperatures during asphalt paving applications. In these circumstances, there is the possibility for fuming. These fumes can vary in intensity and, if significant, may attract complaints. The bitumen's chemical composition depends on the crude oil from which it originates. A tool to screen bitumen and evaluate its potential to release fumes would be highly beneficial. In this study, three methods have been employed to investigate a series of bitumen samples that were known to produce complaints by (a) quantifying benzene, toluene, ethylbenzene, and m, o, p-xylene (BTEX), (b) measuring the partition coefficients of these analytes, and (c) measuring the volatile mass of bitumen exposed to isothermal heating. It was found that the concentration of BTEX varied significantly between bitumen samples. The partition coefficients of these analytes are substantially the same between samples. Finally, the volatile mass of each sample varies significantly between samples, independent of bitumen grade or country of origin. These volatile masses correlate strongly with fuming complaints from bitumen and can be used as predictors of bitumen fuming risk.
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Affiliation(s)
- Zachary Deller
- Applied
Chemistry and Environmental Science, School of Science, STEM College, RMIT University, Melbourne, Victoria 3001, Australia
| | - Stephen Grist
- Applied
Chemistry and Environmental Science, School of Science, STEM College, RMIT University, Melbourne, Victoria 3001, Australia
| | - Filippo Giustozzi
- Civil
and Infrastructure, School of Engineering, STEM College, RMIT University, Melbourne, Victoria 3001, Australia
| | - Subashani Maniam
- Applied
Chemistry and Environmental Science, School of Science, STEM College, RMIT University, Melbourne, Victoria 3001, Australia
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