A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Engineering properties of asphalt binders containing nanoclay and chemical warm-mix asphalt additives
Highlights We investigate nanoclays and a chemical WMA additive for possible WMA application. Nanoclays modified binders increased the G ∗/sin δ values and failure temperatures. The NCMB B4% could potentially become a new WMA binder.
Abstract In the effort to promote the construction of green pavement the asphalt concrete industry has been making consistent effort to use warm-mix asphalt (WMA) in their construction. The objective of this study was to improve the properties of the asphalt binders through the addition of nanoclays and chemical WMA additive. An asphalt binder of 80/100 penetration grade was modified with different percentages of Nanoclay A (montmorillonite clay surface modified with 35–45wt.% dimethyl dialkyl (C14–C18) amine), Nanoclay B (montmorillonite clay surface modified with 35–45wt.% octadecylamine, and 0.5–5.0wt.% aminopropyl-triethoxysilane), and chemical WMA additive (fatty polyamines polymer non-ionic component). After modification, the asphalt binders were named Nanoclay A modified asphalt binder (NCMB A), Nanoclay B modified asphalt binder (NCMB B), and chemical WMA modified asphalt binder (CWAA). The rheological characteristics of the unmodified and modified asphalt binders were evaluated using the rotational viscosity, dynamic shear rheometer, and bending beam rheometer tests. Results of the tests showed that NCMB B and CWAA significantly reduced mixing and compaction temperatures. However, only NCMB B showed a significant increase in rutting and fatigue resistance when compared with base asphalt binder. A change in chemical bond was also observed in the tested binders after long-term aging, which suggests that the addition of modifier could delay the aging process.
Engineering properties of asphalt binders containing nanoclay and chemical warm-mix asphalt additives
Highlights We investigate nanoclays and a chemical WMA additive for possible WMA application. Nanoclays modified binders increased the G ∗/sin δ values and failure temperatures. The NCMB B4% could potentially become a new WMA binder.
Abstract In the effort to promote the construction of green pavement the asphalt concrete industry has been making consistent effort to use warm-mix asphalt (WMA) in their construction. The objective of this study was to improve the properties of the asphalt binders through the addition of nanoclays and chemical WMA additive. An asphalt binder of 80/100 penetration grade was modified with different percentages of Nanoclay A (montmorillonite clay surface modified with 35–45wt.% dimethyl dialkyl (C14–C18) amine), Nanoclay B (montmorillonite clay surface modified with 35–45wt.% octadecylamine, and 0.5–5.0wt.% aminopropyl-triethoxysilane), and chemical WMA additive (fatty polyamines polymer non-ionic component). After modification, the asphalt binders were named Nanoclay A modified asphalt binder (NCMB A), Nanoclay B modified asphalt binder (NCMB B), and chemical WMA modified asphalt binder (CWAA). The rheological characteristics of the unmodified and modified asphalt binders were evaluated using the rotational viscosity, dynamic shear rheometer, and bending beam rheometer tests. Results of the tests showed that NCMB B and CWAA significantly reduced mixing and compaction temperatures. However, only NCMB B showed a significant increase in rutting and fatigue resistance when compared with base asphalt binder. A change in chemical bond was also observed in the tested binders after long-term aging, which suggests that the addition of modifier could delay the aging process.
Engineering properties of asphalt binders containing nanoclay and chemical warm-mix asphalt additives
Abdullah, Mohd Ezree (author) / Zamhari, Kemas Ahmad (author) / Hainin, Mohd Rosli (author) / Oluwasola, Ebenezer Akin (author) / Hassan, Norhidayah Abdul (author) / Yusoff, Nur Izzi Md. (author)
Construction and Building Materials ; 112 ; 232-240
2016-02-17
9 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2016
| British Library Online Contents | 2016
| British Library Online Contents | 2016
Engineering Physical Properties of Asphalt Binders through Nanoclay-Asphalt Interactions
| British Library Online Contents | 2014