Formation of polymer modified binder structure in the presence of carbon nanomaterials

• Published in: Construction & building materials Vol. 303; p. 124591
• Main Authors: Shekhovtsova, Svetlana, Korolev, Evgeniy
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 11.10.2021
• Subjects: Aging; Asphaltene-resinous complexes; Carbon primary nanomaterials; Delamination; Destruction; Mechanism; Polymer modified binder; Scanning electron microscopy; Structure formation; Polymer modified binder; Scanning electron microscopy; Carbon primary nanomaterials; Destruction; Structure formation; Asphaltene-resinous complexes; Aging; Delamination; Mechanism
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2021.124591

•Formation of PMB structure in the presence of nanomaterials was investigated.•Increasing dispersion of ARC is observed when modifying nanomaterials.•Nanomaterials provide inhibition of aging of polymer modified binder.•Nanomaterials provide reduce delamination of polymer modified binder.•Nanomaterials is structural elements occurs which prevents the coagulation of ARC.•Nanomaterials provide reduce destructive of polymer modified binder. Polymer modified binder are subject to delamination processes due to the destruction of the structure and are not resistant to thermal-oxidative aging processes. The use of carbon nanomaterials is an effective tool for improving the quality of organic binders. It is possible to form the structure of the material after studying the processes of structure formation and establishing the main control factors. Using the chromatographic method, asphalt-resinous complexes were extracted from polymer nano-modified binders. The peculiarities of structure formation of polymer nano-modified binders are examined using scanning electron microscopy. Asphaltene-resinous complexes were studied using the Matrix Laboratory application programs and computational modules written in the C++ programming language. The hypothesis of asphaltene-resinous complexes as “molecular stickies” has been studied and confirmed. The general physical and mechanical properties of polymer nano-modified binders, their stability during storage and resistance to the thermal-oxidative aging process were studied. The mechanism of the process of structuring polymer modified binders with carbon nanomaterials, which ensures the resistance of binders to destructive processes, such as delamination and aging has been established. It was established that it is the CNMs that increases resistance to destructive processes which increases the resistance against destructive processes and protects the ARC from aggregation and sedimentation.