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A platform for research: civil engineering, architecture and urbanism
Experimental Investigation on the Reuse of Reclaimed Asphalt Pavement over Weak Subgrade
Reclaimed asphalt pavement (RAP) materials are a sustainable solution for highway construction and therefore gained more attention in recent years. The bearing capacity of RAP is not sufficient to withstand the applied wheel loads, resulting in excessive deformation and vertical stresses. The geosynthetic reinforcement improves the load-bearing capacity of RAP bases and makes pavement usable for traffic. This paper presents the experimental results of static plate load test on unreinforced and geocell-reinforced bases; furthermore, the geotextile functioning was also observed. The surface deformation decreases with the increase in the height of geocell and placement of geotextile. The geocell restricts the lateral movement by increasing the lateral resistance of infill material; geotextile at the interface decreases the deformation and vertical stress transferred to the weak subgrade. The geocell of different heights (10 cm, 12.5 cm and 15 cm) was used in this study with varying thicknesses of base course. The geocell and geotextile reinforcement increases the bearing capacity by 43%, 88% and 96% in the case of 12-cm-, 15-cm- and 20-cm-thick bases respectively. The average vertical stress decreases by 53% and the stress distribution angle increases from 21 to 60°. The overall findings showed that the geosynthetics improved the performance of RAP bases, making them reusable for pavement construction.
Experimental Investigation on the Reuse of Reclaimed Asphalt Pavement over Weak Subgrade
Reclaimed asphalt pavement (RAP) materials are a sustainable solution for highway construction and therefore gained more attention in recent years. The bearing capacity of RAP is not sufficient to withstand the applied wheel loads, resulting in excessive deformation and vertical stresses. The geosynthetic reinforcement improves the load-bearing capacity of RAP bases and makes pavement usable for traffic. This paper presents the experimental results of static plate load test on unreinforced and geocell-reinforced bases; furthermore, the geotextile functioning was also observed. The surface deformation decreases with the increase in the height of geocell and placement of geotextile. The geocell restricts the lateral movement by increasing the lateral resistance of infill material; geotextile at the interface decreases the deformation and vertical stress transferred to the weak subgrade. The geocell of different heights (10 cm, 12.5 cm and 15 cm) was used in this study with varying thicknesses of base course. The geocell and geotextile reinforcement increases the bearing capacity by 43%, 88% and 96% in the case of 12-cm-, 15-cm- and 20-cm-thick bases respectively. The average vertical stress decreases by 53% and the stress distribution angle increases from 21 to 60°. The overall findings showed that the geosynthetics improved the performance of RAP bases, making them reusable for pavement construction.
Experimental Investigation on the Reuse of Reclaimed Asphalt Pavement over Weak Subgrade
Transp. Infrastruct. Geotech.
Sheikh, Ishfaq Rashid (author) / Shah, M. Y. (author)
Transportation Infrastructure Geotechnology ; 7 ; 634-650
2020-12-01
17 pages
Article (Journal)
Electronic Resource
English
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