Predicted design thickness of modified hma layer for flexible highway pavement
Other Title(s)
السمك التصميمي المتنبأ به لطبقة الخلطة الإسفلتية الحارة المحسنة ضمن تبليط طرق المرن
Author
Source
Issue
Vol. 8, Issue 1 (31 Jan. 2017), pp.79-96, 18 p.
Publisher
University of Kufa Faculty of Engineering
Publication Date
2017-01-31
Country of Publication
Iraq
No. of Pages
18
Main Subjects
Abstract EN
The major reason for using asphalt mixture modifiers is to improve the performance of asphalt pavement to meet the requirement under prevailing stresses from traffic loading and environment effects and to reduce the pavement thickness.
Structural thickness design of asphalt pavement layers is a function of many factors; one of the most important of them is the elastic modulus (E) of the asphalt mix.
E values may be estimated directly in a laboratory by test, or indirectly by correlation with other tests like Marshall Stability.
Additionally, E of hot mixture asphalt is used to estimate the layer relative strength coefficient (a) that is used to estimate the Structural Number parameter (SN), which allows for determining the required layer thickness.
The major objective of this research is to predate a statically model to estimate the effect of asphalt modification on the layer thickness.
75 specimens of control and modified HMA for surface are designed and tested according to Marshall Method with optimum asphalt cement content (4.8%) and different types and contents of available modifiers.
In order to establish a relationship between the thickness of the surface layer (D) for a flexible pavement and modifier type (MT) with modifier content (MR) in the mix design.
The structural model showed a nonlinear relationship between the parameters of the mix design having R2 = 0.7 as shown below: D = a*e (b*MT) + c*e (g*MR) (a, b, e, g are constants)
American Psychological Association (APA)
al-Khafaji, Fatimah Fahim. 2017. Predicted design thickness of modified hma layer for flexible highway pavement. Kufa Journal of Engineering،Vol. 8, no. 1, pp.79-96.
https://search.emarefa.net/detail/BIM-786015
Modern Language Association (MLA)
al-Khafaji, Fatimah Fahim. Predicted design thickness of modified hma layer for flexible highway pavement. Kufa Journal of Engineering Vol. 8, no. 1 (Jan. 2017), pp.79-96.
https://search.emarefa.net/detail/BIM-786015
American Medical Association (AMA)
al-Khafaji, Fatimah Fahim. Predicted design thickness of modified hma layer for flexible highway pavement. Kufa Journal of Engineering. 2017. Vol. 8, no. 1, pp.79-96.
https://search.emarefa.net/detail/BIM-786015
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 95-96
Record ID
BIM-786015