(Received 13 April 2013; accepted 23 September 2013)
Published Online: 2013
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Bitumen use in flexible pavements is energy intensive and is associated with many environmental concerns. A natural organic binder, Agmin, which is both renewable and cheap, was investigated in combination with cement dust as a substitute for bitumen. This paper highlights the preliminary results of this investigation. An experimental program was set up that included Marshall and Superpave testing procedures. Marshall stability and flow, rutting susceptibility, and resilient modulus were among the parameters measured for Agmin–cement dust mixes. Samples were subjected to heat cycles as part of their durability assessment. The results of this investigation indicate that Agmin–cement dust road mix displays greater stability than unmodified asphalt mixes and is less susceptible to rutting. It is also relatively unaffected by temperature changes.
Abdel Warith, Karim A.
Ph.D. Candidate, School of Civil Engineering, Purdue Univ.,
Khedr, Safwan A.
Full Professor, Dept. of Construction and Architectural Engineering, The American Univ. in Cairo, Cairo,
Stock #: ACEM20130079