Abstract—Pre-mature failure of hot mix asphalt pavements in Pakistan is generally due to intense loadings owing to which frequent maintenance is required. To prevent pre-mature failure and make pavements economically efficient and effective, several alternatives should be designed. In this study, pavement made of Stone Matrix Asphalt (SMA-25) is proposed as an alternative to increase the service life and minimize the damages in terms moisture sensitivity. The study includes the use of Crumb rubber and Munjin fiber as main additives in Bitumen. Study is composed of two parts in first part change in behavior/properties of bitumen was studied by addition of crumb rubber @ 2%, 4%, 6%, 8%, 10% and 12%. In second part, volumetric properties and performance behavior of SMA-25 were studied. It was found that mix showed good behavior at 5.8% bitumen content and 4.8% rubber content. It was observed that volumetric behavior of Crumb modified SMA was totally reversed to that of Conventional SMA. Crumb modified SMA also showed good behavior against moisture sensitivity at optimum rubber content.
Index Terms—Stabilizing agent, stone matrix asphalt, hot mix asphalt, modified asphalt pavement, Munjin fibers, CRUMB rubber, moisture sensitivity.
Hasnain Gardezi and Arshad Hussain are with National University of Science and Technology/University of Wah, Wah Cantt, Pakistan (e-mail: Hasnain.haider@wecuw.edu.pk, drarshad@nit.nust.edu.pk).
[PDF]
Cite: Hasnain Gardezi and Arshad Hussain, "Volumetric Optimization and Moisture Sensitivity Analysis of Crumb Modified Stone Mastic Asphalt," International Journal of Engineering and Technology vol. 10, no. 5, pp. 386-389, 2018.
