Design of Job Mix Formula (JMF) for Recycled Asphalt Pavement (RAP)

Muhammad Tahir  Mahesar; Saeed  Ahmed; Touqeer Ali  Rind; Muhammad Farooque  Panhyar; Noor  Khan; Usama  Soomro; Rafiullah  Dharejo

doi:10.64615/fjes.1.SpecialIssue.2025.54

Authors

Muhammad Tahir Mahesar Department of Civil Engineering, Mehran University of Engineering and Technology SZAB Campus, Khairpur Mir, Sindh, Pakistan Author
Saeed Ahmed Department of Civil Engineering, DHA Suffa University, Karachi, Pakistan Author
Touqeer Ali Rind Department of Civil Engineering, Mehran University of Engineering and Technology SZAB Campus, Khairpur Mir, Sindh, Pakistan Author
Muhammad Farooque Panhyar Department of Civil Engineering, Mehran University of Engineering and Technology SZAB Campus, Khairpur Mir, Sindh, Pakistan Author
Noor Khan Department of Civil Engineering, Mehran University of Engineering and Technology SZAB Campus, Khairpur Mir, Sindh, Pakistan Author
Usama Soomro Department of Civil Engineering, Mehran University of Engineering and Technology SZAB Campus, Khairpur Mir, Sindh, Pakistan Author
Rafiullah Dharejo Department of Civil Engineering, Mehran University of Engineering and Technology SZAB Campus, Khairpur Mir, Sindh, Pakistan Author

DOI:

https://doi.org/10.64615/fjes.1.SpecialIssue.2025.54

Abstract

In hot climatic regions such as Pakistan, asphalt pavements often experience premature deterioration due to extreme heat, causing issues like cracking and rutting that significantly shorten their functional lifespan. roads don’t last long. Therefore, the need for asphalt rehabilitation prior to its use is almost necessary. This research article presents a laboratory study of asphalt Rehabilitation. Rehabilitated asphalt samples have been produced by mixing a 60/70 penetration grade unmodified (base) asphalt with used material content. The results indicated rehabilitation improved conventional. Although, the usage of rehabilitated asphalt road will decrease the cost of the binder use. Therefore, the usage of rehabilitated asphalt road is more economical, because it gives better results of stability and flow values as well. The Optimum Bitumen Content appeared to be 1.35 % whereas Stability values came to be 1441.843, 1480.292 ,1587.95 ,1238.063 ,1134.25 of various Bitumen Contents.