TY - GEN
T1 - Numerical Analysis of hydraulic conductivity effect on the utilization of recycled asphalt pavement in highway design
AU - Mijic, Zorana
AU - Hatipoglu, Mustafa
AU - Dayioglu, Asli Y.
AU - Aydilek, Ahmet H.
N1 - Publisher Copyright:
© 2023 American Society of Civil Engineers (ASCE). All rights reserved.
PY - 2023
Y1 - 2023
N2 - In this paper, the effect of hydraulic conductivity of RAP on drainage time and minimum required thickness of highway base layers was evaluated via DRIP (Drainage Requirement in Pavements), a US FHWA software. Seven RAP materials collected from various places within the state of Maryland were used in the analyses. In addition, their performance as a highway base material were compared with a traditional graded aggregate base material (GAB) and stone no. 57. The time-To-drain approach was employed to evaluate the drainage capability of RAP as well as the control materials. DRIP software helps to categorize the base material as poor, fair, good, and excellent based on the required time for 50% drainage of the infiltrating water. A series of analysis was performed to investigate the influence of drainage percentage U, base thickness H, and hydraulic conductivity k on time-To-drain. The results indicate that the fines content and hydraulic conductivity significantly affect the time to drain, particularly after 40% drainage. Furthermore, increasing the base thickness results in a drastic decrease in time to drain. When compared with the traditional base materials, it can be concluded that RAP materials yield satisfactory results for utilization as a highway base material in terms of drainage capabilities.
AB - In this paper, the effect of hydraulic conductivity of RAP on drainage time and minimum required thickness of highway base layers was evaluated via DRIP (Drainage Requirement in Pavements), a US FHWA software. Seven RAP materials collected from various places within the state of Maryland were used in the analyses. In addition, their performance as a highway base material were compared with a traditional graded aggregate base material (GAB) and stone no. 57. The time-To-drain approach was employed to evaluate the drainage capability of RAP as well as the control materials. DRIP software helps to categorize the base material as poor, fair, good, and excellent based on the required time for 50% drainage of the infiltrating water. A series of analysis was performed to investigate the influence of drainage percentage U, base thickness H, and hydraulic conductivity k on time-To-drain. The results indicate that the fines content and hydraulic conductivity significantly affect the time to drain, particularly after 40% drainage. Furthermore, increasing the base thickness results in a drastic decrease in time to drain. When compared with the traditional base materials, it can be concluded that RAP materials yield satisfactory results for utilization as a highway base material in terms of drainage capabilities.
UR - http://www.scopus.com/inward/record.url?scp=85151626190&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85151626190&partnerID=8YFLogxK
U2 - 10.1061/9780784484661.064
DO - 10.1061/9780784484661.064
M3 - Conference contribution
AN - SCOPUS:85151626190
T3 - Geotechnical Special Publication
SP - 612
EP - 621
BT - Geotechnical Special Publication
A2 - Rathje, Ellen
A2 - Montoya, Brina M.
A2 - Wayne, Mark H.
PB - American Society of Civil Engineers (ASCE)
T2 - 2023 Geo-Congress: Sustainable Infrastructure Solutions from the Ground Up - Soil Improvement, Geoenvironmental, and Sustainability
Y2 - 26 March 2023 through 29 March 2023
ER -