About the authors
| First name, Middle name, Last name, Scientific degree, Scientific rank, Current position. Full and brief name of the organization, The organization address. | Damir A. Ayupov, candidate of technical sciences, associate professor, Kazan State University of Architecture and Engineering, Kazan, Russian Federation. Email: This e-mail address is being protected from spambots. You need JavaScript enabled to view it |
| Title of the article | Stabilization of bituminous polymer dispersions by surfactants |
| Abstract. | Problem statement. Polymer bitumen binders are widely used in road and roof construction, as well as for the production of waterproofing, sealing and anti-corrosion materials. One of the most significant and common for all polymer modified bitumens (PMB) is their tendency to delamination, which complicates their storage and transportation. At the same time, it is known that surfactants can be effective stabilizers of dispersed systems. In addition, surfactants are widely used in PMBs, not as stabilizers, but as adhesive additives. Their stabilizing effectiveness in binders has not yet been studied. The effectiveness of surfactants for stabilizing bitumen-polymer dispersions is known by the example of bitumen-latex aqueous emulsions. Surfactants are used in them as emulsifiers, however, emulsions still have, as a rule, even greater stratification than PMB, which is associated with the low viscosity of the dispersion medium. All this significantly limits the possibilities for the wide production and use of bituminous polymer dispersions: binders and emulsions. Therefore, the study of the stabilizing effectiveness of the surfactants used in them is an urgent task. The aim of the research is to study the stabilizing effectiveness of surfactants used to stabilize polymer bitumen binders and to develop an effective surfactant for stabilizing bitumen emulsions. To achieve the goal, the following tasks were solved: 1. To study the composition of surfactants used in PMBs. 2. To determine their influence on the properties of binders. 3. To study the stabilizing effectiveness of the applied surfactants. 4. To develop an effective surfactant for the stabilization of bitumen emulsions. 5. To study the rheological properties of bitumen emulsions. 6. To study the properties of bitumen polymer binders obtained by coagulation of bitumen emulsions. Results. The main result of the study of surfactants in PMB is the conclusion about their low stabilizing efficiency. A binary surfactant has been developed to stabilize bitumen emulsions. Conclusions. Surfactants for PMB stabilization are ineffective. Alternative methods are needed to solve this problem. An effective binary emulsifier for bitumen emulsions has been developed. |
| Keywords. | PMB stability, PMB delamination, bitumen emulsion, PMB, sprayed waterproofing, liquid rubber, emulsifier |
| For citations: | Ayupov D.A. Stabilization of bituminous polymer dispersions by surfactants // News KSUAE 2023 № 2 (64), p. 17-26, DOI: 10.52409/20731523_2023_2_17, EDN: NACQDE |
