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Preparation and properties of silane coupling agent modified zeolite as warm mix additive
https://orcid.org/0000-0001-9829-8455
Highlights Zeolite was modified successfully by silane coupling agent (KH550 and KH560). The hydrophobicity and dispersibility of modified zeolites increased significantly. The viscosity reduction effect of modified zeolites on asphalt was greatly enhanced. The comprehensive road performances of WMA with modified zeolites were enhanced.
Abstract Zeolite is a common additive for warm mix asphalt. In order to improve the dispersion and water loss rate of zeolite in asphalt, it was modified by γ-ammoniapropyltriethoxysilane (KH550, namely KH550-Zeolite) and γ-(2,3-epoxypropoxy)propytrimethoxysilane (KH560, namely KH560-Zeolite). FTIR demonstrated KH550 and KH560 were grafted to the surface of zeolite through chemical reaction, and SEM showed that the agglomeration of the modified zeolites was weaker than that of zeolite. Laser particle size analyzer revealed the particle size of zeolite, KH550-Zeolite and KH560-Zeolite mainly distributed in 7–20 μm, 4–10 μm and 3–8 μm, respectively. The KH550-Zeolite and KH560-Zeolite were more compatible with n-heptane than zeolite and the water contact angles of zeolite, KH550-Zeolite and KH560-Zeolite were 0°, 36.75° and 63.5°. In hot asphalt, the water loss of zeolite was non-uniform (first fast, then slow), while that of KH550-Zeolite and KH560-Zeolite was uniform, which results in that the viscosity reduction effect of KH550-Zeolite and KH560-Zeolite on asphalt was better than that of zeolite. The residual Marshall stability, flexural breaking strain and dynamical stability of warm mix asphalt with KH550-Zeolite or KH560-Zeolite were higher than those of warm mix asphalt with zeolite. When the mixing and compaction temperature of warm mix asphalt was 30 °C lower than that of hot mix asphalt, the comprehensive road performance of warm mix asphalt with KH550-zeolite was better than that of hot mix asphalt.
Preparation and properties of silane coupling agent modified zeolite as warm mix additive
https://orcid.org/0000-0001-9829-8455
Highlights Zeolite was modified successfully by silane coupling agent (KH550 and KH560). The hydrophobicity and dispersibility of modified zeolites increased significantly. The viscosity reduction effect of modified zeolites on asphalt was greatly enhanced. The comprehensive road performances of WMA with modified zeolites were enhanced.
Abstract Zeolite is a common additive for warm mix asphalt. In order to improve the dispersion and water loss rate of zeolite in asphalt, it was modified by γ-ammoniapropyltriethoxysilane (KH550, namely KH550-Zeolite) and γ-(2,3-epoxypropoxy)propytrimethoxysilane (KH560, namely KH560-Zeolite). FTIR demonstrated KH550 and KH560 were grafted to the surface of zeolite through chemical reaction, and SEM showed that the agglomeration of the modified zeolites was weaker than that of zeolite. Laser particle size analyzer revealed the particle size of zeolite, KH550-Zeolite and KH560-Zeolite mainly distributed in 7–20 μm, 4–10 μm and 3–8 μm, respectively. The KH550-Zeolite and KH560-Zeolite were more compatible with n-heptane than zeolite and the water contact angles of zeolite, KH550-Zeolite and KH560-Zeolite were 0°, 36.75° and 63.5°. In hot asphalt, the water loss of zeolite was non-uniform (first fast, then slow), while that of KH550-Zeolite and KH560-Zeolite was uniform, which results in that the viscosity reduction effect of KH550-Zeolite and KH560-Zeolite on asphalt was better than that of zeolite. The residual Marshall stability, flexural breaking strain and dynamical stability of warm mix asphalt with KH550-Zeolite or KH560-Zeolite were higher than those of warm mix asphalt with zeolite. When the mixing and compaction temperature of warm mix asphalt was 30 °C lower than that of hot mix asphalt, the comprehensive road performance of warm mix asphalt with KH550-zeolite was better than that of hot mix asphalt.
Preparation and properties of silane coupling agent modified zeolite as warm mix additive
https://orcid.org/0000-0001-9829-8455
Highlights Zeolite was modified successfully by silane coupling agent (KH550 and KH560). The hydrophobicity and dispersibility of modified zeolites increased significantly. The viscosity reduction effect of modified zeolites on asphalt was greatly enhanced. The comprehensive road performances of WMA with modified zeolites were enhanced.
Abstract Zeolite is a common additive for warm mix asphalt. In order to improve the dispersion and water loss rate of zeolite in asphalt, it was modified by γ-ammoniapropyltriethoxysilane (KH550, namely KH550-Zeolite) and γ-(2,3-epoxypropoxy)propytrimethoxysilane (KH560, namely KH560-Zeolite). FTIR demonstrated KH550 and KH560 were grafted to the surface of zeolite through chemical reaction, and SEM showed that the agglomeration of the modified zeolites was weaker than that of zeolite. Laser particle size analyzer revealed the particle size of zeolite, KH550-Zeolite and KH560-Zeolite mainly distributed in 7–20 μm, 4–10 μm and 3–8 μm, respectively. The KH550-Zeolite and KH560-Zeolite were more compatible with n-heptane than zeolite and the water contact angles of zeolite, KH550-Zeolite and KH560-Zeolite were 0°, 36.75° and 63.5°. In hot asphalt, the water loss of zeolite was non-uniform (first fast, then slow), while that of KH550-Zeolite and KH560-Zeolite was uniform, which results in that the viscosity reduction effect of KH550-Zeolite and KH560-Zeolite on asphalt was better than that of zeolite. The residual Marshall stability, flexural breaking strain and dynamical stability of warm mix asphalt with KH550-Zeolite or KH560-Zeolite were higher than those of warm mix asphalt with zeolite. When the mixing and compaction temperature of warm mix asphalt was 30 °C lower than that of hot mix asphalt, the comprehensive road performance of warm mix asphalt with KH550-zeolite was better than that of hot mix asphalt.
Preparation and properties of silane coupling agent modified zeolite as warm mix additive
Han, Xiaobin (author) / Yu, Jianying (author) / Cao, Zhilong (author) / Wang, Ruiyang (author) / Du, Wei (author) / He, Peng (author) / Ge, Yangyang (author)
2020-02-10
Article (Journal)
Electronic Resource
English
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