Evaluation of fatigue life of CRM-reinforced SMA and its relationship to dynamic stiffness

Nuha Salim Mashaan, Mohamed Rehan Karim, Mahrez Abdel Aziz, Mohd Rasdan Ibrahim, Herda Yati Katman, Suhana Koting

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Fatigue cracking is an essential problem of asphalt concrete that contributes to pavement damage. Although stone matrix asphalt (SMA) has significantly provided resistance to rutting failure, its resistance to fatigue failure is yet to be fully addressed. The aim of this study is to evaluate the effect of crumb rubber modifier (CRM) on stiffness and fatigue properties of SMA mixtures at optimum binder content, using four different modification levels, namely, 6%, 8%, 10%, and 12% CRM by weight of the bitumen. The testing undertaken on the asphalt mix comprises the dynamic stiffness (indirect tensile test), dynamic creep (repeated load creep), and fatigue test (indirect tensile fatigue test) at temperature of 25°C. The indirect tensile fatigue test was conducted at three different stress levels (200, 300, and 400 kPa). Experimental results indicate that CRM-reinforced SMA mixtures exhibit significantly higher fatigue life compared to the mixtures without CRM. Further, higher correlation coefficient was obtained between the fatigue life and resilient modulus as compared to permanent strain; thus resilient modulus might be a more reliable indicator in evaluating the fatigue life of asphalt mixture.

Original languageEnglish
Article number968075
JournalScientific World Journal
Volume2014
DOIs
Publication statusPublished - 01 Jan 2014

Fingerprint

asphalt
Rubber
rubber
fatigue
Fatigue
stiffness
Stiffness
Fatigue of materials
matrix
Asphalt mixtures
creep
Creep
rutting
evaluation
stone
Asphalt concrete
bitumen

All Science Journal Classification (ASJC) codes

  • Biochemistry, Genetics and Molecular Biology(all)
  • Environmental Science(all)

Cite this

Mashaan, Nuha Salim ; Karim, Mohamed Rehan ; Abdel Aziz, Mahrez ; Ibrahim, Mohd Rasdan ; Katman, Herda Yati ; Koting, Suhana. / Evaluation of fatigue life of CRM-reinforced SMA and its relationship to dynamic stiffness. In: Scientific World Journal. 2014 ; Vol. 2014.
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Evaluation of fatigue life of CRM-reinforced SMA and its relationship to dynamic stiffness. / Mashaan, Nuha Salim; Karim, Mohamed Rehan; Abdel Aziz, Mahrez; Ibrahim, Mohd Rasdan; Katman, Herda Yati; Koting, Suhana.

In: Scientific World Journal, Vol. 2014, 968075, 01.01.2014.

Research output: Contribution to journalArticle

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