Engineering properties of asphalt binders containing nanoclay and chemical warm-mix asphalt additives

Abdullah, Mohd Ezree and Zamhari, Kemas Ahmad and Oluwasola, Ebenezer Akin and Abdul Hassan, Norhidayah and Ahmad, Nur Izzi (2016) Engineering properties of asphalt binders containing nanoclay and chemical warm-mix asphalt additives. Construction and Building Materials, 112. pp. 232-240. ISSN 0950-0618

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In the effort to promote the construction of green pavement the asphalt concrete industry has been mak-ing 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 35–45 wt.% dimethyl dialkyl (C14–C18) amine), Nanoclay B (montmorillonite clay surface modified with 35–45 wt.% octadecylamine, and 0.5–5.0 wt.% 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 tem-peratures. 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. © 2016 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Green pavement; Warm mix asphalt; Nanoclay Chemical additive; Rutting Fatigue
Subjects: T Technology > TH Building construction > TH1000-1725 Systems of building construction. Including fireproof construction, concrete construction
Divisions: Faculty of Civil Engineering and Built Environment > Department of Civil Engineering : Building and Construction Engineering
Depositing User: Mrs. Mashairani Ismail
Date Deposited: 22 Nov 2021 04:15
Last Modified: 22 Nov 2021 04:15

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