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Polymers (Basel)

Title:		Emission of Volatile Organic Compounds in Crumb Rubber Modified Bitumen and Its Inhibition by Using Montmorillonite Nanoclay
Author(s):		Liu G; Fang S; Wang Y; Liu J; Liang Y; Cao T; Liu Q;
Address:		"State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China. College of Water and Architectural Engineering, Shihezi University, Shihezi 832003, China. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China"
Journal Title:		Polymers (Basel)
Year:		2023
Volume:		20230318
Issue:		6
Page Number:		-
DOI:		10.3390/polym15061513
ISSN/ISBN:		2073-4360 (Electronic) 2073-4360 (Linking)
Abstract:		"Bitumen emits a large amount of volatile organic compounds (VOCs) during the production and construction of asphalt mixture, which can cause both environmental hazards and health risks. In this study, a setup was designed to collect the VOCs released by base and crumb rubber-modified bitumen (CRMB) binders and their composition was characterized by thermal desorption-gas chromatography-mass spectrometry (TD-GC-MS). Next, organic montmorillonite (Mt) nanoclay was added into CRMB binder and its inhibiting effect on the VOCs emission of the binder was investigated. Finally, the VOCs emission models for the CRMB and Mt-modified CRMB (Mt-CRMB) binders were established according to reasonable assumptions. The results indicated that the VOCs emission of CRMB binder was 3.2 times larger than that of the base binder. Due to its intercalated structure, the nanoclay can reduce the VOCs emission of CRMB binder by 30.6%. Especially, its inhibition effects on alkanes, olefins, and aromatic hydrocarbons were more significant. After finite element verification, the established model based on the Fick's second law can describe the emission behavior of CRMB and Mt-CRMB binders well. Overall, the Mt nanoclay can be used as an effective modifier to inhibit the VOCs emission of CRMB binder"
Keywords:		VOCs bitumen crumb rubber inhibition organic montmorillonite;
Notes:		"PubMed-not-MEDLINELiu, Gang Fang, Shuaiyin Wang, Yong Liu, Jinjun Liang, Yangshi Cao, Tingwei Liu, Quantao eng 52068061/National Natural Science Foundation of China/ 20211G0098/Key R&D Program of Hubei Province/ 520LH016/Nature Fund of Hainan Province Joint Fund/ Switzerland 2023/03/30 Polymers (Basel). 2023 Mar 18; 15(6):1513. doi: 10.3390/polym15061513"