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Flexural and Rutting Behaviour of Subgrade Reinforced with Geocell and Demolition Waste as Infill
From various past studies, it was observed that the infill material used could affect the performance of the geocell reinforced subgrade. So, the use of waste materials as infill in geocell reinforced subgrade may prove to be more effective, economical and environmentally friendly. The performance of demolition waste as an infill was studied using flexure testing and rutting analysis and compared the results with that of the other infill materials—soil and sand. Flexural behaviour is very important to the geosynthetic application in pavements as it acts as a flexible layer embedded in pavements and leads to an improvement in stress distribution and reduction in stress on the soil subgrade. The flexural behaviour was determined using four-point bending tests, and results were expressed in terms of modulus improvement factor (MIF). The flexural behaviour was tested in a plywood–polywood three-layered beam model. Elastic modulus of the soil–geocell composite was calculated using closed-form solutions. The rutting analysis was carried out using KENPAVE software. The geocells were prepared with three different aspect ratios 0.45, 0.67 and 1. The demolition waste infilled geocell mattress with aspect ratio 0.67 showed improved flexural behaviour with MIF of 1.63 followed by soil and sand. The improvement was also seen in terms of traffic benefit ratio. Hence, the use of geocell infilled with demolition waste due to its improved flexural and rutting behaviour could be used in pavement subgrade as it can increase the performance and can also curb the difficulties caused by demolition waste.
Flexural and Rutting Behaviour of Subgrade Reinforced with Geocell and Demolition Waste as Infill
From various past studies, it was observed that the infill material used could affect the performance of the geocell reinforced subgrade. So, the use of waste materials as infill in geocell reinforced subgrade may prove to be more effective, economical and environmentally friendly. The performance of demolition waste as an infill was studied using flexure testing and rutting analysis and compared the results with that of the other infill materials—soil and sand. Flexural behaviour is very important to the geosynthetic application in pavements as it acts as a flexible layer embedded in pavements and leads to an improvement in stress distribution and reduction in stress on the soil subgrade. The flexural behaviour was determined using four-point bending tests, and results were expressed in terms of modulus improvement factor (MIF). The flexural behaviour was tested in a plywood–polywood three-layered beam model. Elastic modulus of the soil–geocell composite was calculated using closed-form solutions. The rutting analysis was carried out using KENPAVE software. The geocells were prepared with three different aspect ratios 0.45, 0.67 and 1. The demolition waste infilled geocell mattress with aspect ratio 0.67 showed improved flexural behaviour with MIF of 1.63 followed by soil and sand. The improvement was also seen in terms of traffic benefit ratio. Hence, the use of geocell infilled with demolition waste due to its improved flexural and rutting behaviour could be used in pavement subgrade as it can increase the performance and can also curb the difficulties caused by demolition waste.
Flexural and Rutting Behaviour of Subgrade Reinforced with Geocell and Demolition Waste as Infill
Lecture Notes in Civil Engineering
Satyanarayana Reddy, C. N. V. (editor) / Saride, Sireesh (editor) / Haldar, Sumanta (editor) / Mahima, D. (author) / Sini, T. (author)
2021-08-03
11 pages
Article/Chapter (Book)
Electronic Resource
English
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