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It was reported that for most unmodified bitumens, the R&B softening point equated to a needle penetration of about 800×0,1 mm2 (Heukelom, 1969). R&B softening point is used as the elevated temperature performance of binders. However, the R&B softening point relevance is questionable for modified bitumens so that Dynamic viscosity is used as the elevated service temperature performance. A good correlation is reported with G*/sinδ at a frequency of 10rad/s and 60°C before and after rolling thinrolling oven (RTFO)-aging. The correlation the dynamic viscosity with R&B softening point was good after RFTO-aging, but not before (Alexander, 2000). No relationships have been demonstrated for modified bitumen using dynamic viscosity with R&B softening point. (Balaidi, 2001). There are some relationships, but no correlation has been found in the papers between R&B softening point and other bitumen tests

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  • UzSCI tizimida yaratilgan sana 27-06-2024
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  • Nashr sanasi 30-06-2024
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English

It was reported that for most unmodified bitumens, the R&B softening point equated to a needle penetration of about 800×0,1 mm2 (Heukelom, 1969). R&B softening point is used as the elevated temperature performance of binders. However, the R&B softening point relevance is questionable for modified bitumens so that Dynamic viscosity is used as the elevated service temperature performance. A good correlation is reported with G*/sinδ at a frequency of 10rad/s and 60°C before and after rolling thinrolling oven (RTFO)-aging. The correlation the dynamic viscosity with R&B softening point was good after RFTO-aging, but not before (Alexander, 2000). No relationships have been demonstrated for modified bitumen using dynamic viscosity with R&B softening point. (Balaidi, 2001). There are some relationships, but no correlation has been found in the papers between R&B softening point and other bitumen tests

№ Muallifning F.I.Sh. Lavozimi Tashkilot nomi
1 Joldasbaev E.. Teacher-assistant Toshkent davlat transport universiteti
№ Havola nomi
1 EN 1427 (2007) “Bitumen and Bituminous Binders. Determination of the Softening Point. Ring and Ball Method.”
2 EN 1427 (2015). “Bitumen and bituminous binders - Determination of the softening point. Ring and Ball method.” European Committee for Standardization.
3 AASHTO T53-09-UL (2009). “Standard method of test for softening point of bitumen Ring and Ball Apparatus. American Association of State Highway and Transportation Officials.
4 EN 12591 (2009). “Bitumen and bituminous binders - Specifications for paving grade bitumen.” European Committee for Standardization.
5 EN 14770 (2012). “Bitumen and bituminous binders - Determination of complex shear modulus and phase angle using a Dynamic Shear Rheometer (DSR).” European Committee for Standardization.
6 Hunter, R. N., Self, A. and Read, J. (2015), “The Shell Bitumen Handbook”.
7 BiTVal. (2006). Analysis of available data for validation of bitumen tests (Reports on Phase 1 of the BiTVal Project). Forum of European National Highway Research Laboratories (FEHRL).
8 FunDBitS (2016). Correlations between bitumen and asphalt properties. Permanent deformation. Conference of European Directors of Roads (CEDR).
9 Heukelom W. 1973, An improved method of characterizing asphaltic bitumens with the aid of their mechanical properties. Prooceedings of the Association of Asphalt Paving Technologists.
10 Zoorob, E. Castro-Gomes. P and Pereira Oliveira A. 2012. Assessing low shear viscosity as the new bitumen softening point test. Construction and Buliding Materials.
11 Fan, L. Wei J, Lin J, Zhang Y and Wang L. 2014. “Viscoelastic characteristics of asphalt binders at softening point temperature.” China Petroleum Processing and Petrochemical Technology.
12 Alisov, A. Riccardi C, Schrader J, Cannone F, Wistuba P. 2020. “A novel method to characterize asphalt binder at high temperature.” Road Materials and Pavement Design.
13 Jiqing Zhu, Xiaohu Lu, Michael Langjell and Anders Gadmarsson, 2021 “Quantitative relationship of fundamental rheological properties of bitumen with the empirical Ring and Ball softening point.” Road Materials and Pavement Design, Volume 22.
14 Bahia, H.U. Hanson, D., Zeng, M., Zhai, H., Khatri, M. & Anderson, R. (2001). Characterization of modified asphalt binders in Superpave mix design. Washington.
15 Alisov, A. 2007. “Characterization of modified asphalt binders in Superpave mix design.” Washington.
16 Alisov, A., Riccardi, C., Schrader, J., Cannone Falchetto, A., & Wistuba, M. P. (2020). “A novel method to characterise asphalt binder at high temperature.”
17 Alisov, A., Hagner, T. and Walther, A. 2016, “Quantification of polymer content in binder by modified MSCR-test.” 6th Eurasphalt & Eurobitume Congress. Prague.
18 Lu, X., Isacsson, U. 1997. Characterization of styrene-butadiene-styrene polymer modified bitumens— Comparison of conventional methods and dynamic mechanical analyses.
19 Chabert, D. Triquigneaux J., Vaniscote C., 1999 “ Rheology of elastomer binders and rutting resistance of bituminous mixes”. Performance Related Properties for Bituminous binders.
20 Ramond, G., Malot M., and Jolivet Y., 1999. “Evolution of bitumens and polymer modified bitumen”. Performance related properties for bituminous binders. Eurobitume.
21 Claxton M., 1995. “The rheology to predict the rut resistance of asphalt concrete mixes. The rheology of bituminous binders”. Eurobitume.
22 Perez B., Gomez S., Paez D, 2004. „ Relationship between bituminous biner rheological properties and wheel tracking rutting resistance of asphalt mixtures”. Eurobitume Congress, Vienna.
23 Francken L., Vanelstrate A. 1996. “Complex moduli of bituminous binders and mixes. Interpretation and evaluation”. Eurobitume Congress, Strasburg.
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