International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 11 Issue: 05 | May 2024
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p-ISSN: 2395-0072
DESIGN AND COST ANALYSIS OF FLEXIBLE PAVEMENT: SUBGRADE REINFORCED WITH JUTE AND POLYPROPYLENE FIBRE Lalhriatpuii1, Aakriti Baral1, Ayush1, Susheel Kumar2 1
B. Tech Student, Civil Engineering Department, Delhi Technological University, Delhi, India Associate Professor, Civil Engineering Department, Delhi Technological University, Delhi, India ---------------------------------------------------------------------***--------------------------------------------------------------------2
Abstract - This research focuses on the improvement in the
determined by the stability of the subgrade soil, which is the foundation of any pavement (Hamid & Shafiq, n.d.). Jute fibres and geotextiles have both been effectively utilised to reinforce soils to increase their bearing capacity (Hossain, 2015). One of the most significant utilities is geo-reinforcement, which is primarily used to mechanically increase the strength of soil that has been specially designed for the building of geo-structures (Kumar et al., 2022). According to the results of laboratory testing, this woven geotextile can be used to build medium-traffic unpaved roads both as a separation layer and as a reinforcing material (Basu et al., 2009). When building medium-traffic roads, jute geotextile can be used as both an anchoring material and a separation layer (Pavani et al., n.d.). Jute fibre reinforcement has considerably improved the strength and stiffness properties of soil, according to CBR and Triaxial tests (Lal et al., n.d.). Enhancing the soil leads to an increase in its strength, ductility, bearing capacity, and ability to resist deformations (“Improvement in Subgrade Characteristics of Soil Reinforced With Jute Fibre,” n.d.). A single layer of horizontal reinforcement placed within the soil significantly raises the CBR value of the soil (Choudhary et al., 2012). When two layers of jute fibre are combined, the soaked CBR value and maximum dry density both rise (R & Muralidhar, 2015). As fibre length and diameter increase, so does the soil's CBR value (Singh & Bagra, 2013).
construction of flexible pavement, which is vital for strong transportation networks and economic growth. In this research, the focus is on improving the strength of the subgrade soil(measured using the California Bearing Ratio Test) by introducing ground improvement materials like Jute Fibre and Polypropylene Fibre. The addition of these reinforcements leads to an increase in the CBR value of the subgrade which leads to a decrease in the thickness of the overall pavement design. This helps in the improvement of pavement performance while lowering construction costs and placing a strong emphasis on creative and sustainable roadstrengthening techniques. So we can say that this research not only enhances pavement engineering but also encourages the creation of ecologically friendly infrastructure using economical methods.
Key Words: California Bearing Ratio Method, Flexible Pavement, Pavement Thickness, Subgrade, IRC 37, Subgrade CBR, Jute Fibre, Polypropylene Fibre, Cost Analysis, Sustainability
1. INTRODUCTION A sustainable transport network is one of the most important necessities in this age, and the quality of the subgrade of pavement plays a pivotal role in a road's lifespan and usefulness. Black-top pavements that exhibit rutting, pushing, waves, and corrugations are usually the result of inadequate subgrade conditions (Khanna & Justo, 2011). The majority of transportation-related research has concentrated on improving and fortifying the soil used as the subgrade for flexible pavements (Pandit et al., n.d.). The findings of laboratory and field experiments that evaluate the impact of different reinforcing techniques on pavement performance are presented by (Rajagopal et al., 2014). The results of their experiment demonstrate that adding reinforcement enhances the strength, stiffness, and endurance of pavement systems under repeated loads.
The strength and ductility of soils may be significantly increased by combining sand, lime, and polypropylene fibres (Meddah et al., 2022). When soil dry density rises, the fibre/soil interfacial peak strength (IPS) and interfacial residual strength (IRS) decrease, whereas soil water content rises (Tang et al., 2010). When LDPE is added, the softening point tends to rise, indicating improved resistance to deformation (Al-Hadidy & Tan, 2009). This study investigates the use of polypropylene and jute fibre for improving the ground during pavement building. Important qualities were examined in soil samples taken from university property. There was a percentage improvement with appropriate fibre content when the California Bearing Ratio (CBR) values of the reinforced and unreinforced samples were monitored. The
The process of stabilizing soil is to enhance its engineering performance and make it useful for a range of engineering projects (Prasanna & Nm, 2020). The performance, longevity, and efficacy of a pavement are
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