Abstract
The present research was aimed to develop the scientific applied principles and technologies of composite bituminous materials for civil engineering based on the investigation of the structures of polymer modifier and bitumen-polymer binder (BPB) on its basis with the use of nuclear magnetic resonance (NMR). The method of pulsed NMR was chosen as one of the rapid analysis methods that can be used for the analysis of bitumen-polymer systems, especially when assessing the group chemical composition of residual oil feedstock (ROF), bitumens and composite materials based on them. Using the method of pulsed NMR the regularities of the impact of modifier component composition on the changes of structural-group composition of the original and modified products were specified. Based on the results of research the optimal ratio of bitumen-polymer binder components was investigated, the manufacturability of the process for obtaining of composite bituminous materials for civil engineering with the aim of optimizing the quality of the final products was evaluated. Pulsed NMR - spectroscopy is suggested as input and output quality control of bituminous products. The regularities of redistribution of the phases with different molecular mobility and their relationship with the binder components were investigated. Rapid technique for quantifying the content of polymer in the solvent was developed.
Highlights
Nuclear magnetic relaxation (NMR) is one of the modern instrumental methods of physical chemistry (Kimmich and Anoardo, 2004; Conte and Alonzo, 2013, Xu et al, 2013, Bayer et al, 2013; Haber-Pohlmeier et al, 2013) and is a fundamental property of nuclear magnetism, characterizing the dynamics of nuclear spins system in the oil bitumen-polymer systems.Pulsed nuclear magnetic resonance (NMR) method increasingly finds its application in rapid analysis of the bitumen-polymer systems, especially when assessing the group chemical composition of residual oil feedstock (ROF), bitumens and composite materials based on them
While developing the scientific applied principles and technologies of composite bituminous materials for civil engineering the structures of polymer modifier and bitumen-polymer binder (BPB) on its basis were investigated by nuclear magnetic resonance (NMR)
Summary It has shown that the injection of the polymer additive the amount of oil fraction increases, the amount of asphaltenes decreases, bitumen dilution happens, solvation shell partially immerse into oil fraction
Summary
Nuclear magnetic relaxation (NMR) is one of the modern instrumental methods of physical chemistry (Kimmich and Anoardo, 2004; Conte and Alonzo, 2013, Xu et al, 2013, Bayer et al, 2013; Haber-Pohlmeier et al, 2013) and is a fundamental property of nuclear magnetism, characterizing the dynamics of nuclear spins system in the oil bitumen-polymer systems.Pulsed NMR method increasingly finds its application in rapid analysis of the bitumen-polymer systems, especially when assessing the group chemical composition of residual oil feedstock (ROF), bitumens and composite materials based on them. It should be noted that the study of NMR spectra is based on the resonating nuclei systems that are extremely sensitive to the magnetic environment where the local magnetic fields near the resonating nuclei are dependent on the intra- and intermolecular effects This determines the value of NMR spectroscopy to investigate the structure and behavior of many-electron (molecular) systems in different fields of science (Washburn and Birdwell, 2013; Nascimento, et al, 2004; Bayer, et al, 2010; Berman, et al, 2013; Charlier, et al, 2013; Kemalov, et al, 2012; Kemalov et al, 2013; Kruk et al, 2012, Twieg, 2013, Frantsuzov, 2010). The structural features of ODS in general can reliably be assumed (Kemalov and Kemalov, 2013)
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