Rutting analysis of modified asphalt concrete pavements

2017 ◽  
Vol 170 (4) ◽  
pp. 166-177 ◽  
Author(s):  
Reza Imaninasab ◽  
Behzad Bakhshi
Keyword(s):  
Asphalt Concrete ◽  
Concrete Pavements ◽  
Modified Asphalt

scholarly journals Performance Evaluation of Geocomposite Reinforcement in Flexible Pavements using Marshall Test Protocol

2018 ◽  
Vol 203 ◽  
pp. 06020 ◽  
Author(s):  
Adnan Qadir ◽  
Karam-un-Nisa Choudhary
Keyword(s):  
Performance Evaluation ◽  
Asphalt Concrete ◽  
Concrete Surface ◽  
Concrete Pavements ◽  
Reflective Cracking ◽  
Test Protocol ◽  
Modified Asphalt ◽  
Marshall Test ◽  
Asphalt Content ◽  
External Loads

Asphalt concrete pavements are prone to cracking due to external loads and extreme weathering conditions. Generally the failed asphalt concrete is over laid with new asphalt concrete surface to improve the riding surface; however after sometime the crack reappears in the form of reflective cracking. Studies have found that such cracks can be controlled by introduction of Geo-synthetics layer before overlaying. The presented study presents one such effort in which the performance of such modification was evaluated by testing a number of modified specimens using Marshall’s test protocol. The resulting Stability flow quotient at optimum asphalt content showed no appreciable improvement as expected. Hence it can be concluded that the performance of Geocomposite modified asphalt concrete cannot be evaluated using Marshall Test protocols.

scholarly journals Evaluating the Influence of Polymer Modified Asphalt Binders on Low Temperature Properties

2018 ◽  
Vol 163 ◽  
pp. 05012
Author(s):  
Amal Abdelaziz ◽  
Chun-Hsing Ho ◽  
Matthew Snyder
Keyword(s):  
Low Temperature ◽  
Asphalt Concrete ◽  
Asphalt Binder ◽  
Traffic Load ◽  
Asphalt Binders ◽  
Concrete Pavements ◽  
Modified Asphalt ◽  
Modified Asphalt Binder ◽  
Low Temperature Cracking ◽  
Sbs Modified Asphalt

Low temperature cracking is one of the most common distress types in asphalt concrete pavements, particularly in cold regions. Many factors influence the behaviour of asphalt concrete pavements at low temperatures, such as the applied traffic load, environmental conditions and material characteristics. Asphalt binders are one of the primary factors that influence material properties. The purpose of this study is to compare the performance of two types of asphalt binders: styrene-butadiene-styrene (SBS) modified asphalt binder and unmodified asphalt binder in resisting low temperature cracking. The study was conducted in Flagstaff, located at the area of Northern Arizona, in the United States. Asphalt samples were collected from the paving sections and were compacted and trimmed into small beams. Bending Beam Rheometer tests were performed, using the trimmed specimens at temperatures of -6°C, -12°C and -18°C. Based on the results of the study, it was concluded that, SBS modified asphalt binder performs better in resisting low temperature cracking, compared to the unmodified binder. Based on the study outcomes, it is recommended to use SBS polymer modified polymers in areas subjected to severe cold weather events to maximize the life span of asphalt concrete pavements.

Microstructure analysis and mechanical performance of crumb rubber modified asphalt concrete using the dry process

2020 ◽  
Vol 259 ◽  
pp. 119662 ◽  
Author(s):  
Israel Rodríguez-Fernández ◽  
Farrokh Tarpoudi Baheri ◽  
Maria Chiara Cavalli ◽  
Lily D. Poulikakos ◽  
Moises Bueno
Keyword(s):  
Asphalt Concrete ◽  
Mechanical Performance ◽  
Crumb Rubber ◽  
Microstructure Analysis ◽  
Dry Process ◽  
Modified Asphalt
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