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Enhancing the Mechanical Properties of Gap Graded Cold Asphalt Containing Cement Utilising By-Product Material



Author(s)

Abbas Al-Hdabi1, 2, Hassan Al Nageim1, Felecite Ruddock1 and Linda Seton3

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DOI:10.17265/1934-7359/2013.08.002

1. School of Built Environment, Liverpool John Moores University, Liverpool L3 2ET, UK
2. Engineering Faculty, Kufa University, Alnajaf 54001, Iraq
3. School of Pharmacy and Bimolecular Science, Liverpool John Moores University, Liverpool L3 3AF, UK

The little stiffness modulus, high voidage and long curing time has limited the use of CBEM’s (cold bituminous emulsion mixtures) in road and highways to pavement experiencing low traffic. The aim of this study is to improve the properties of gap graded CRA (cold rolled asphalt) containing OPC (ordinary portland cement) as filler by addition of a by-product material as an activator. OPC was added to the CRA as a replacement to the conventional mineral filler (0%-100%), while LJMUA (Liverpool John Moores University Activator) was added as an additive in the range from 0%-3% by total mass of aggregate. Laboratory tests included stiffness modulus and uniaxial creep test to assess the mechanical properties. The results have shown a considerable improvement in the mechanical properties from the addition of LJMUA to the CRA containing OPC especially for the early life stiffness modulus that is the main disadvantage of the cold mixtures.

Stiffness modulus, creep stiffness, ordinary portland cement, cold rolled asphalt.