International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 06 | Jun 2024
p-ISSN: 2395-0072
www.irjet.net
Enhancement of Cold Mixes by the Utilization of Recycled Asphalt Pavement (RAP) and Plastic-Coated Aggregates Akshaya Anil1, Akhil R2, Ruksana B3, Varsha Franklin4, Ammu B Crusho5 1Student, Dept. of Civil Engineering, Bishop Jerome Institute, Kerala, India 2Student, Dept. of Civil Engineering, Bishop Jerome Institute, Kerala, India
3Student, Dept. of Civil Engineering, Bishop Jerome Institute, Kerala, India 4Student, Dept. of Civil Engineering, Bishop Jerome Institute, Kerala, India 5Assistant Professor, Dept. of Civil Engineering, Bishop Jerome Institute, Kerala, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - Pavements, being the most cost-effective mode of
primarily due to the formation of potholes. Potholes vary in size, depth, and location, necessitating tailored repair methods to address the specific characteristics of each pothole effectively.
transportation, are currently experiencing degradation primarily due to the emergence of potholes. Potholes present a significant threat in the current scenario, causing discomfort for both drivers and passengers and posing a substantial danger to human life as a whole. It is crucial to address this issue, and several factors contribute to its occurrence, including the use of poor-quality materials, increasing traffic loads, and flooding conditions on roads. Traditionally, hot mix technology has been widely used for road pavement construction. However, this method has its limitations. To overcome these challenges, cold mix technology has been introduced, offering the advantage of not requiring the heating of aggregates and bitumen, thereby reducing overall pollution levels. Despite this progress, limitations still exist, as pothole regeneration is observed even after implementing these advanced technologies. Therefore, there is an urgent need to explore innovative approaches to effectively repair potholes. This discussion focuses on the utilization of Reclaimed Asphalt Pavement (RAP) methods and PETmodified aggregates for preparing cold mixes. Extensive testing has been conducted on aggregates and emulsions, yielding satisfactory results. The findings indicate that these materials are suitable for conventional cold mix design. Subsequently, samples were prepared for the Marshall Test, which allowed for the determination of stability and flow values. Based on these results, the optimal binder content was established. It was observed that the cold mixes with plastic coated aggregate were performing better and we suggest that this mix could be used for pothole-patching and enhancing the overall durability and sustainability of road infrastructure.
The prevalence of potholes is increasing, particularly in the context of road construction in Kerala, where the commonly used hot mix asphalt method has proven insufficient in preventing pothole formation. The introduction of cold mix asphalt has extended the life of roads, but further enhancements are required for more satisfactory results. To achieve this, the incorporation of new additives into conventional cold mixtures becomes essential. Cold mix asphalt, when appropriately modified, demonstrates the potential to significantly outperform hot mix asphalt, indicating the necessity for advancements in the conventional cold mix approaches. In the realm of highway infrastructure, a concerted effort is underway to mitigate the carbon footprint associated with traditional construction methods. Among these efforts, Cold Mix Asphalt technology stands out as a promising solution. Unlike its counterparts, Cold Mix Asphalt (CMA) eliminates the need for material heating by employing asphalt emulsion and cutback as binding agents. These substances, liquid at room temperature, facilitate mixing and compaction without the energy-intensive heating process required by Hot Mix Asphalt and Warm Mix Asphalt. CMA, boasting superiority in cost-effectiveness, energy efficiency, and environmental friendliness, operates within a manufacturing temperature range of 0–40 °C. Its key advantages include cost-effectiveness, environmental friendliness, reduced emissions, and ready availability. This sets the stage for a promising future in eco-friendly road construction. To further enhance the performance of CMA and address the prevailing challenges, this research explores the incorporation of Recycled Asphalt Pavement (RAP) and plastic-coated aggregates into the mix design.
Key Words: Cold mixes, Recycled Asphalt Pavement, PETmodified aggregates, Pothole repair, Sustainability.
1.INTRODUCTION Potholes are depressions in road surfaces that pose significant challenges for drivers. These roadway imperfections can lead to substantial vehicle damage and present dangers to motorists attempting to navigate around them. Despite roads being the most cost-effective mode of transportation, premature deterioration often occurs,
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As reported in previous studies, the utilization of RAP and plastic-coated aggregates in CMA has the potential to improve its durability, resistance to rutting, and overall sustainability (Oreto et al., 2021) (Puccini et al., 2019)
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