Abstract:
ABSTRACT
A new technique called semi-flexible pavement comprises of an open-graded asphalt concrete with a high air void content that is filled with specialized grouting materials. It exhibits a high level of rutting resistance while being designed without joints, contraction, or expansion. Additionally, these surfaces offer protection against gasoline spills. Flexible pavements commonly experience stresses due to repetitive load and temperature change. However, the building of inflexible pavements is expensive, results in a rough surface, and takes a long time to open to traffic. As a result, semi-flexible pavements can be used as an alternative to stiff and flexible pavements. In the current investigation, cementitious grouts for semi-flexible pavement will be prepared using rice husk ash as a partial replacement for ordinary Portland cement (OPC). Replacement of Ordinary Portland Cement with 5%, 10%, 15%, and 20% Rice Husk Ash, water-cement ratio of 0.30 to 0.40, and superplasticizer in the range of 0 to 1% will be used to prepare cement grouts. The grouts' flowability, compressive strength (1d, 7d, and 28d), and flexure strength (28d) will all be evaluated. Response Surface Methodology (RSM) will be used for statistical analysis and optimization to identify the ideal composition of grouts. Semi-flexible specimens will be created and put through performance tests (such as Marshal Stability and Resilient Modulus) based on the composition of the final chosen grouts. The specimens' ability to withstand fuel spills will also be examined. Environmental sustainability and a reduction in carbon dioxide (CO2) will be achieved by recycling waste materials and substituting cement with inexpensive resources like rice husk ash.
