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SBS modified bitumen in the presence of hydrophilic or hydrophobic silica nanoparticles

Xia, Tian / Zhou, Longmei / Lan, Shiwei / Huang, Xu

Highlights•The hydrophobic R974 modified bitumen/SBS blends have much better rheological property than the hydrophilic A200 modified blends due to the preferential attraction between bitumen and R974.•The droplet-matrix structure in bitumen/SBS blends does not change by SiO2 nanoparticles due to the large compositional asymmetry between bitumen and SBS.•The nonmonotonic improvement of rutting resistance by increasing SiO2 fraction is mainly determined by the coupling effects of distribution of SiO2 nanoparticles and their aggregates.

AbstractThe rheological behavior of bitumen/SBS modified by SiO2 is found to be strongly dependent on SiO2 surface nature and its fraction. The hydrophobic R974 modified bitumen/SBS blends have much better rheological property than the hydrophilic A200 modified blends due to the preferential attraction between bitumen and R974. The rheological property exhibits a nonmonotonic change with SiO2 fraction either in R974 or A200 modified blends, which is closely related to the dispersion of nanoparticles. The rigid nanoparticles themselves play a main role in the rheological behavior, rather than the unchanged droplet-matrix structure with different droplet size induced by phase separation.

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SBS modified bitumen in the presence of hydrophilic or hydrophobic silica nanoparticles

Xia, Tian / Zhou, Longmei / Lan, Shiwei / Huang, Xu

Highlights•The hydrophobic R974 modified bitumen/SBS blends have much better rheological property than the hydrophilic A200 modified blends due to the preferential attraction between bitumen and R974.•The droplet-matrix structure in bitumen/SBS blends does not change by SiO2 nanoparticles due to the large compositional asymmetry between bitumen and SBS.•The nonmonotonic improvement of rutting resistance by increasing SiO2 fraction is mainly determined by the coupling effects of distribution of SiO2 nanoparticles and their aggregates.

AbstractThe rheological behavior of bitumen/SBS modified by SiO2 is found to be strongly dependent on SiO2 surface nature and its fraction. The hydrophobic R974 modified bitumen/SBS blends have much better rheological property than the hydrophilic A200 modified blends due to the preferential attraction between bitumen and R974. The rheological property exhibits a nonmonotonic change with SiO2 fraction either in R974 or A200 modified blends, which is closely related to the dispersion of nanoparticles. The rigid nanoparticles themselves play a main role in the rheological behavior, rather than the unchanged droplet-matrix structure with different droplet size induced by phase separation.

SBS modified bitumen in the presence of hydrophilic or hydrophobic silica nanoparticles

Xia, Tian / Zhou, Longmei / Lan, Shiwei / Huang, Xu

Highlights•The hydrophobic R974 modified bitumen/SBS blends have much better rheological property than the hydrophilic A200 modified blends due to the preferential attraction between bitumen and R974.•The droplet-matrix structure in bitumen/SBS blends does not change by SiO2 nanoparticles due to the large compositional asymmetry between bitumen and SBS.•The nonmonotonic improvement of rutting resistance by increasing SiO2 fraction is mainly determined by the coupling effects of distribution of SiO2 nanoparticles and their aggregates.

AbstractThe rheological behavior of bitumen/SBS modified by SiO2 is found to be strongly dependent on SiO2 surface nature and its fraction. The hydrophobic R974 modified bitumen/SBS blends have much better rheological property than the hydrophilic A200 modified blends due to the preferential attraction between bitumen and R974. The rheological property exhibits a nonmonotonic change with SiO2 fraction either in R974 or A200 modified blends, which is closely related to the dispersion of nanoparticles. The rigid nanoparticles themselves play a main role in the rheological behavior, rather than the unchanged droplet-matrix structure with different droplet size induced by phase separation.

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Title:

SBS modified bitumen in the presence of hydrophilic or hydrophobic silica nanoparticles

Contributors:

Xia, Tian (author) / Zhou, Longmei (author) / Lan, Shiwei (author) / Huang, Xu (author)

Published in:

Construction and Building Materials ; 153 ; 957-964

Publication date:

2017-07-24

Size:

8 pages

ISSN:

DOI:

https://doi.org/10.1016/j.conbuildmat.2017.07.177

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Phase separation , Hydrophilic , Hydrophobic , Preferential attraction

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