Warm Mix Asphalt Technology: A Review

2014 ◽  
Vol 71 (3) ◽  
Author(s):  
Mohd Ezree Abdullah ◽  
Kemas Ahmad Zamhari ◽  
Rosnawati Buhari ◽  
Siti Khatijah Abu Bakar ◽  
Nurul Hidayah Mohd Kamaruddin ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Warm Mix Asphalt ◽  
Mix Design ◽  
Asphalt Binders ◽  
Different Types ◽  
Performance Issues

Warm Mix Asphalt (WMA) represents the technologies that allow the reducing of asphalt binders’ mixing and compaction temperatures by reducing its binders’ viscosity. This paper gives a comprehensive chronological review from prior researches and practical experienced among researchers and industrial practitioners while implementing WMA technology including constituent materials, mix design and mechanical performance issues. Within this, the problems and benefits as well as different types of WMA additives were clearly identified as essential for a better understanding of the application of WMA technology in pavement constructions.

Study on Design Method of Warm Mix Asphalt

2011 ◽  
Vol 374-377 ◽  
pp. 1813-1816
Author(s):  
Chun Wang ◽  
Pei Wen Hao ◽  
Rui Xia Li ◽  
Qing Zhang
Keyword(s):  
Design Method ◽  
Temperature Stability ◽  
Warm Mix Asphalt ◽  
Test Method ◽  
Mix Design ◽  
High Temperature Stability ◽  
Marshall Test ◽  
Different Types ◽  
Low Temperature Cracking ◽  
Resistance Performance

The paper studied on the mix design method of two different warm mix asphalt adopted Marshall test and SGC(Superpave Gyratory Conpactor) test, and analysed their differences of high temperature stability, low temperature cracking resistance performance. The results show that, for different types of warm mix asphalt, it should be taken a different test method to design. It was recommended that the design of warm mix asphalt based on surface activity agent should use Marshall method, and warm mix asphalt with the addition of organic agent should use SGC method.

Hierarchical Design and Nanomechanics of the Calcified Byssus of Anomia simplex

2009 ◽  
Vol 1187 ◽  
Author(s):  
Jakob R Eltzholtz ◽  
Marie Krogsgaard ◽  
Henrik Birkedal
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Scanning Electron Microscopy ◽  
Mechanical Performance ◽  
Blue Mussel ◽  
Hierarchical Design ◽  
Reduced Modulus ◽  
Different Types ◽  
Microscopy Images ◽  
Scanning Electron

AbstractBiology has evolved several strategies for attachment of sedentary animals. In the bivalves, byssi abound and the best known example being the protein-based byssus of the blue mussel and other Mytilidae. In contrast the bivalve Anomia sp. has a single calcified thread. The byssus is hierarchical in design and contains several different types of structures as revealed by scanning electron microscopy images. The mechanical properties of the byssus are probed by nanoindentation. It is found that the mineralized part of the byssus is very stiff with a reduced modulus of about 67 GPa and a hardness of ˜3.7 GPa. This corresponds to a modulus roughly 20% smaller than that of pure calcite and a hardness that is about 20% larger than pure calcite. The results reveal the importance of microstructure on mechanical performance.

Comparison of Laboratory and Field Asphalt Aging for Polymer-Modified and Warm-Mix Asphalt Binders

2018 ◽  
Vol 30 (7) ◽  
pp. 04018150 ◽  
Author(s):  
Weiguang Zhang ◽  
Amirmohammad Bahadori ◽  
Shihui Shen ◽  
Shenghua Wu ◽  
Balasingam Muhunthan ◽  
...  
Keyword(s):  
Warm Mix Asphalt ◽  
Asphalt Binders

High-Performance Thin-Lift Overlays with High Reclaimed Asphalt Pavement Content and Warm-Mix Asphalt Technology

2012 ◽  
Vol 2293 (1) ◽  
pp. 18-28 ◽  
Author(s):  
Walaa S. Mogawer ◽  
Alexander J. Austerman ◽  
Robert Kluttz ◽  
Michael Roussel
Keyword(s):  
High Performance ◽  
Asphalt Pavement ◽  
Warm Mix Asphalt ◽  
Asphalt Binders ◽  
Reclaimed Asphalt Pavement ◽  
Moisture Susceptibility ◽  
Reclaimed Asphalt ◽  
Pavement Preservation ◽  
Asphalt Overlay ◽  
Structural Capacity

A high-performance thin asphalt overlay (HPThinOL) is specified as having a thickness of 1 in. or less and is used in applications requiring high levels of rutting and fatigue resistance. HPThinOLs are used as a pavement preservation strategy and are placed on pavements that have remaining structural capacity that is expected to outlive that strategy. Current specifications for HPThinOLs generally call for a polymer-modified asphalt (PMA). However, PMA binders are more expensive than unmodified asphalt binders. This expense, coupled with the higher binder content requirement generally associated with HPThinOL, could lead to an initial higher cost in relation to other pavement preservation strategies. Although the higher initial cost can be offset by incorporating high amounts of reclaimed asphalt pavement (RAP), the use of high amounts of RAP in PMA mixtures might adversely affect the mixture performance (stiffness, cracking, or workability). Warm-mix asphalt (WMA) technology may improve the workability of HPThinOL that incorporates high RAP content and PMA binders. This study evaluated the effect of PMA binders, high RAP content, and WMA technology on the stiffness, resistance to reflective cracking, moisture susceptibility, and workability of HPThinOL mixtures. PMA binders and high RAP content increased the stiffness of HPThinOL significantly; however, the use of WMA technology lowered mixture stiffness and improved workability. PMA may improve the cracking resistance, moisture susceptibility, and rutting resistance of high-RAP HPThinOL mixtures, depending on whether a WMA technology is used.

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