A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Theoretical Evaluation of Sand Subgrade Behavior Underneath the Asphalt Pavement with Rutting Deformation
Asphalt layers in flexible pavement structure consider the most costly than other layers and play an essential role in the cost of a highway structure. This paper will investigate the influence of change in thickness of asphalt layer on rutting and strain in the flexible pavement when roads construct above sand soil subgrade. Two methods are implemented; the first is the experimental inspections by simulation of three paved highway layers, using an iron box with dimensions of 60 cm length, 50 cm width, and 40 cm depth. Sandy soil is used as a subgrade course layer to study its behavior by using it as a part of a flexible pavement structure under a traffic load at a relative density of 57%. The impact of change in the thickness of the asphalt concrete layer in the distribution pattern for rutting and strain behavior is also investigated using a three-dimensional finite element approach by the ABAQUS program ver.6.14.4. One of the models is building verify of ABAQUS simulation; after ascertaining the program, other models built to simulate the real road with dimension (5 m width and 10 m length) which represented ring road of Baghdad university, three thickness of asphalt layer 5 cm, 10 cm, 15 cm, and 20 cm are used. The thickness of the subbase layer and sand subgrade layer was stilled constant at all models, 25 cm and 250 cm. The laboratory results demonstrated that the low number of the truck passed when used sand soil at a relative density of 57% as a subgrade layer led to the failure of the flexible pavement; the verifying result shows the ABAQUS program was very good in the simulation laboratory model. The real road simulation results illustrated that when asphalt layer thickness, the number of passes increases, and the rutting and strain decrease.
Theoretical Evaluation of Sand Subgrade Behavior Underneath the Asphalt Pavement with Rutting Deformation
Asphalt layers in flexible pavement structure consider the most costly than other layers and play an essential role in the cost of a highway structure. This paper will investigate the influence of change in thickness of asphalt layer on rutting and strain in the flexible pavement when roads construct above sand soil subgrade. Two methods are implemented; the first is the experimental inspections by simulation of three paved highway layers, using an iron box with dimensions of 60 cm length, 50 cm width, and 40 cm depth. Sandy soil is used as a subgrade course layer to study its behavior by using it as a part of a flexible pavement structure under a traffic load at a relative density of 57%. The impact of change in the thickness of the asphalt concrete layer in the distribution pattern for rutting and strain behavior is also investigated using a three-dimensional finite element approach by the ABAQUS program ver.6.14.4. One of the models is building verify of ABAQUS simulation; after ascertaining the program, other models built to simulate the real road with dimension (5 m width and 10 m length) which represented ring road of Baghdad university, three thickness of asphalt layer 5 cm, 10 cm, 15 cm, and 20 cm are used. The thickness of the subbase layer and sand subgrade layer was stilled constant at all models, 25 cm and 250 cm. The laboratory results demonstrated that the low number of the truck passed when used sand soil at a relative density of 57% as a subgrade layer led to the failure of the flexible pavement; the verifying result shows the ABAQUS program was very good in the simulation laboratory model. The real road simulation results illustrated that when asphalt layer thickness, the number of passes increases, and the rutting and strain decrease.
Theoretical Evaluation of Sand Subgrade Behavior Underneath the Asphalt Pavement with Rutting Deformation
Karkush, Mahdi O. (editor) / Choudhury, Deepankar (editor) / Al-Abdullah, Saad F. I. (author) / Teama, Zaman T. (author) / Aldahwi, Suha (author) / Zaidn, Maysaloon (author)
Geotechnical Engineering and Sustainable Construction ; Chapter: 48 ; 597-609
2022-03-20
13 pages
Article/Chapter (Book)
Electronic Resource
English
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