Laboratory performance of warm mix asphalt (WMA) with chemical based additive

Mohd Kamaruddin, Nurul Hidayah and Zamhari, Kemas Ahmad Laboratory performance of warm mix asphalt (WMA) with chemical based additive. In: The International Conference on Civil and Environmental Engineering Sustainability (IConCEES 2011), 3-5 April 2012, Johor Bahru, Malaysia.

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Abstract

Warm mix asphalt (WMA) is a technology used in road construction that shows the potential of improving energy efficiency by reducing the temperature production and application on site. In general, WMA refers to the process of pavement production at temperature lower than conventional hot mix asphalt by the addition of additives. In this study, the effects of chemical based additive-liquid surfactant to the binder properties and mixture performance were evaluated. The materials used were bitumen penetration grade 80/100, aggregates of granite and chemical based additive-liquid surfactant with recommended doses of 0.4%. The experimental works included physical tests of aggregate, binder tests (dynamic shear rheometer, viscosity test, penetration and softening point) and mixture performance tests (indirect tensile strength test, moisture sensitivity test, indirect tensile stiffness modulus test and creep test). The outcomes showed that the addition of liquid surfactant had slightly changed the properties of modified binder. The modified bitumen for warm mix asphalt indicated high consistency and lower softening point than ordinary bitumen. Warm mix asphalt mixtures also showed better results in term of strength, stiffness and lower rate of permanent deformation. However, in moisture sensitivity test, the tensile strength ratio of warm mix asphalt was slightly lower than control. Tensile strength ratio value of control obtained as 88.41% compared to warm mix asphalt, 80.66%. As the conclusion, the addition of liquid surfactant had assisted the warm mix asphalt to perform as well as hot mix although it was produced at lower temperature, except for moisture resistance.

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:Warm Mix Asphalt; chemical based additive; performance evaluation
Subjects:T Technology > TE Highway engineering. Roads and pavements
ID Code:2536
Deposited By:Normajihan Abd. Rahman
Deposited On:06 Nov 2012 08:52
Last Modified:06 Nov 2012 08:52

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