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PROPERTIES OF NANOCLAY MODIFIED BITUMEN FOR SUSTAINABLE ASPHALT PAVEMENTS
Abstract
Nanoclay is increasingly being integrated into construction materials to enhance their mechanical properties. This advanced material improves the durability and strength of concrete, making structures more resilient to environmental stresses. Research shows that incorporating nanoclay into asphalt can improve its performance and longevity in road construction. The paper focuses on laboratory research on the effect of nanoclay adding on bitumen binder properties. The changes in penetration, softening point, and viscosity have been evaluated in relation to the consistency at intermediate and elevated service temperatures, and flow behavior under different temperature conditions. The experimental analysis showed the nanoclay improves the strength properties of bitumen, and increases the bitumen consistency and softening point. A more accurate assessment of the temperature susceptibility of bitumen was provided by viscosity testing. According to the viscosity-temperature susceptibility parameters (PVN and A-VTS values), a decrease in the temperature sensitivity of bitumen by nanoclay modification was identified. Following the activation theory of flow as determined by Arrhenius, reduction in the activation energy of bitumen by the effect of nanoclay were recorded. These results found can be an input for the evaluation of the use of nanoclay modified bitumen in asphalts designed for road pavements.
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