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A platform for research: civil engineering, architecture and urbanism
Prediction of Moisture Damage in Asphalt Pavements Using a Nanomechanistic Approach
Stripping-related moisture damage in asphalt pavements is a complex phenomenon that deteriorates the durability and performance of the pavements. In recent years, several studies have been conducted at both macro- and micro-levels to find the root causes of the moisture damage. The main goal of this study is to predict the moisture-induced damage using one of the emerging technologies using an Atomic Force Microscopy (AFM) tool. Binder samples originated from two different crude sources have been collected and tested in the laboratory using an advanced mode of nanomechanical mapping, namely the Peak Force Quantitative Nanomechanical Mapping (PFQNM™) mode. In this study, two Performance Grade (PG) base binders and their modified counterparts using polyphosphoric acid (PPA), styrene–butadiene–styrene (SBS), and SBS plus PPA have been evaluated to achieve the goals of this study. To observe the moisture effects, asphalt binder samples were tested under both dry and wet conditions. Test results showed that the surface topography of the asphalt binders and their mechanical properties have had changed notably because of the presence of moisture. It is also evident that the base binders used in this study are highly susceptible to moisture damage, whereas SBS-modified binders have sufficient strength that can be used for the construction of durable pavements. The findings of this study are expected to the State Departments of Transportations (DOTs) and other transportation agencies to gain in-depth knowledge of moisture damage mechanisms in asphalt pavements.
Prediction of Moisture Damage in Asphalt Pavements Using a Nanomechanistic Approach
Stripping-related moisture damage in asphalt pavements is a complex phenomenon that deteriorates the durability and performance of the pavements. In recent years, several studies have been conducted at both macro- and micro-levels to find the root causes of the moisture damage. The main goal of this study is to predict the moisture-induced damage using one of the emerging technologies using an Atomic Force Microscopy (AFM) tool. Binder samples originated from two different crude sources have been collected and tested in the laboratory using an advanced mode of nanomechanical mapping, namely the Peak Force Quantitative Nanomechanical Mapping (PFQNM™) mode. In this study, two Performance Grade (PG) base binders and their modified counterparts using polyphosphoric acid (PPA), styrene–butadiene–styrene (SBS), and SBS plus PPA have been evaluated to achieve the goals of this study. To observe the moisture effects, asphalt binder samples were tested under both dry and wet conditions. Test results showed that the surface topography of the asphalt binders and their mechanical properties have had changed notably because of the presence of moisture. It is also evident that the base binders used in this study are highly susceptible to moisture damage, whereas SBS-modified binders have sufficient strength that can be used for the construction of durable pavements. The findings of this study are expected to the State Departments of Transportations (DOTs) and other transportation agencies to gain in-depth knowledge of moisture damage mechanisms in asphalt pavements.
Prediction of Moisture Damage in Asphalt Pavements Using a Nanomechanistic Approach
Lecture Notes in Civil Engineering
Reddy, Krishna R. (editor) / Agnihotri, Arvind K. (editor) / Yukselen-Aksoy, Yeliz (editor) / Dubey, Brajesh K. (editor) / Bansal, Ajay (editor) / Roy, Sumon (author) / Hossain, Zahid (author)
2020-09-17
8 pages
Article/Chapter (Book)
Electronic Resource
English
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