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Analysis of Rheological Properties and Moisture Resistance of Nanoclay-Modified Asphalt Binders
The primary aim of this study is to improve the rheological properties and moisture resistance of asphalt binder by the modification of a sustainable material named “nanoclay.” Rheological properties and moisture resistance of selected nanoclay-modified asphalt binders have been evaluated. Three types of nanoclays (Cloisite 10A, Cloisite 11B, and Cloisite 15A) at 1, 2, and 3% by the weight of asphalt binder were blended with a base binder (PG 64-22) from two sources. A blending protocol consisting of a duration of 2 h, a rotation of 2000 rpm, and a temperature of 1500 C were used to blend the nanoclays with the asphalt binders. Rheological properties of nanoclay-modified asphalt binders were then determined by using a Rotational Viscometer (RV) and a Dynamic Shear Rheometer (DSR). The viscosity of the nanoclay 2% Cloisite 10A-modified binder was about 248% of that of the neat binder. It was found that the consistency of a nanoclay-modified binder was significantly higher than the neat binder. The rutting factor (G*/sinδ) also increased significantly for the nanoclay-modified asphalt binders. An Optical Contact Analyzer (OCA) was used to evaluate moisture susceptibility. Binder modified by 3% Cloisite 10A showed the highest surface free energy and cohesiveness. An Atomic Force Microscope (AFM) was used to characterize the nanoclay-modified samples. Surface roughness increased, but no improvement was observed in the DMT (Derjaguin–Muller–Toporov) moduli values. Besides, the adhesion parameter, which indicates the moisture susceptibility, increased significantly.
Analysis of Rheological Properties and Moisture Resistance of Nanoclay-Modified Asphalt Binders
The primary aim of this study is to improve the rheological properties and moisture resistance of asphalt binder by the modification of a sustainable material named “nanoclay.” Rheological properties and moisture resistance of selected nanoclay-modified asphalt binders have been evaluated. Three types of nanoclays (Cloisite 10A, Cloisite 11B, and Cloisite 15A) at 1, 2, and 3% by the weight of asphalt binder were blended with a base binder (PG 64-22) from two sources. A blending protocol consisting of a duration of 2 h, a rotation of 2000 rpm, and a temperature of 1500 C were used to blend the nanoclays with the asphalt binders. Rheological properties of nanoclay-modified asphalt binders were then determined by using a Rotational Viscometer (RV) and a Dynamic Shear Rheometer (DSR). The viscosity of the nanoclay 2% Cloisite 10A-modified binder was about 248% of that of the neat binder. It was found that the consistency of a nanoclay-modified binder was significantly higher than the neat binder. The rutting factor (G*/sinδ) also increased significantly for the nanoclay-modified asphalt binders. An Optical Contact Analyzer (OCA) was used to evaluate moisture susceptibility. Binder modified by 3% Cloisite 10A showed the highest surface free energy and cohesiveness. An Atomic Force Microscope (AFM) was used to characterize the nanoclay-modified samples. Surface roughness increased, but no improvement was observed in the DMT (Derjaguin–Muller–Toporov) moduli values. Besides, the adhesion parameter, which indicates the moisture susceptibility, increased significantly.
Analysis of Rheological Properties and Moisture Resistance of Nanoclay-Modified Asphalt Binders
Lecture Notes in Civil Engineering
Reddy, Krishna R. (editor) / Agnihotri, Arvind K. (editor) / Yukselen-Aksoy, Yeliz (editor) / Dubey, Brajesh K. (editor) / Bansal, Ajay (editor) / Morshed, M. M. Tariq (author) / Hossain, Zahid (author)
2020-09-17
8 pages
Article/Chapter (Book)
Electronic Resource
English
Evaluation of Moisture Susceptibility of Nanoclay-Modified Asphalt Binders
| British Library Conference Proceedings | 2014
Rheological Investigation on the Rutting Characteristics of Nanoclay Modified Asphalt Binders
| Springer Verlag | 2021