Laboratory investigation of stone matrix asphalt modified with SBS polymer and C25 fiber in using the semi-circular bend geometry (SCB) and moisture susceptibility

2020 ◽  
Vol 261 ◽  
pp. 120511
Author(s):  
Seyed Ali Mojabi ◽  
Ali Abdi kordani ◽  
Babak Mirbaha
2006 ◽  
Vol 33 (2) ◽  
pp. 134-139 ◽  
Author(s):  
Vikas Sharma ◽  
Shweta Goyal

Stone matrix asphalt (SMA) is a gap-graded mix that contains a high concentration of coarse aggregate, thereby maximizing stone-to-stone contact in the mixture and providing an efficient network for load distribution. Coarse aggregate particles are held together by a rich matrix of mineral filler and stabilizer in the thick asphalt film. This paper presents details on the laboratory studies carried out on stone matrix asphalt (SMA) mixtures with natural fibres and crumb rubber modified bitumen (CRMB). Indirect tensile strength, retained stability, resistance to moisture susceptibility, resistance to rutting, resistance to creep, and resistance to permeability and aging were found to improve with SMA mixtures with CRMB when compared with SMA mixtures with fibres as stabilizers.Key words: natural fibres, CRMB, SMA mixtures, draindown, moisture damage, creep, rutting, permeability, aging.


2021 ◽  
Vol 33 (1) ◽  
pp. 04020431
Author(s):  
Gholam Hossein Hamedi ◽  
Farhad Sakanlou ◽  
Behnam Omari ◽  
Alireza Azarhoosh

2011 ◽  
Vol 8 (9) ◽  
pp. 103661 ◽  
Author(s):  
Punith V. Shivaprasad ◽  
Feipeng Xiao ◽  
Serji N. Amirkhanian ◽  
T. Edil ◽  
S. W. Dean

Author(s):  
Walaa S. Mogawer ◽  
Kevin D. Stuart

Stone matrix asphalt (SMA) is a gap-graded hot mixture that has higher proportion of coarse aggregate, lower proportion of middle-size aggregate, and higher proportion of mineral filler than a dense-graded mixture. Because of the high quantity of mineral filler, the type and quantity of this fraction should play a major role in the properties of these mixtures and their mastics. Determination of whether mastic and mixture properties can distinguish good mineral fillers from bad ones is the objective. Eight mineral fillers with known performance were obtained from three European countries. Mastics were tested for stiffness using a bending beam rheometer (AASHTO TP1), a dynamic shear rheometer (AASHTO TP5), and softening point of bitumen using the ring-and-ball apparatus (AASHTO T53-92). None of the tests distinguished among mastics with good and bad mineral fillers. Mixtures were tested for draindown of mastic using the National Center for Asphalt Technology draindown test, rutting using the French pavement rutting tester, low-temperature cracking using the indirect tensile test, workability using the U.S. Corps of Engineers gyratory testing machine, and moisture susceptibility using the ASTM D 4867 method. None of the tests distinguished among SMA mixtures with good and bad mineral fillers.


2017 ◽  
Vol 7 (3) ◽  
pp. 297 ◽  
Author(s):  
Yanping Sheng ◽  
Haibin Li ◽  
Ping Guo ◽  
Guijuan Zhao ◽  
Huaxin Chen ◽  
...  

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