Abstract:
Concrete pavements are subjected to repeated traffic loading and environmental exposure, necessitating high mechanical performance, durability, and dimensional stability to ensure long-term serviceability. Conventional concrete, despite its widespread use, may exhibit limitations associated with permeability, microcracking, strength development, and durability under aggressive exposure conditions. The development of high-performance and durable concrete is essential for improving the structural reliability and service life of rigid pavements subjected to repeated traffic loading and environmental exposure. Nanomaterials provide an effective approach for modifying cementitious materials at the nanoscale through enhanced hydration, nucleation, pore refinement, interfacial transition zone densification, and crack-control mechanisms. This study discusses the development of nanomaterial-modified high-performance concrete for rigid pavement applications. A critical assessment of published studies on the properties of nano-modified concrete is presented, quantifying the improvements in material properties. The discussion further extends to elucidate how the enhanced properties can contribute to improved concrete pavement performance, including strength, durability, cracking resistance, and long-term serviceability. Nano-silica can promote pozzolanic reactions with calcium hydroxide and contribute to additional calcium–silicate–hydrate (C–S–H) formation, resulting in pore refinement, densification of the interfacial transition zone, and reduced permeability. The incorporation of nanomaterials can consequently enhance compressive, tensile, and flexural strength while improving resistance to water ingress, and other deterioration mechanisms. The study further addresses the importance of optimizing the nano-silica dosage and its influence on the fresh properties of concrete, particularly workability. The study highlights the potential of nanoscale engineering as a pathway toward high-performance concrete capable of meeting the demanding structural and durability requirements of modern rigid pavements.
Biography:
Dr. Mahesh D Gaikwad is a Scientist in the Rigid Pavement Division at CSIR–Central Road Research Institute (CSIR-CRRI), New Delhi, India. He holds a Master of Technology (M. Tech.) in Structural Engineering and a Ph.D. in Civil/Structural Engineering. Dr. Gaikwad also serves as an Assistant Professor at the Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India. His research interests include high-performance concrete, nano-modified concrete, fibre-reinforced concrete, sustainable and waste-derived construction materials, pavement materials, and advanced concrete characterization. His research work integrates experimental, numerical, laboratory, and field investigations to develop innovative materials and technologies aimed at enhancing the mechanical performance, durability, sustainability, and long-term serviceability of concrete pavements. He has been actively involved in research and industry-sponsored projects, contributing to the development of innovative engineering solutions through technical publications, international and national conference presentations, research proposals, and collaborative research initiatives.
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