Geotechnical and Economical Aspects of Using Mixed Recycled Aggregate from Construction and Demolition Waste for Reinforced Soil Structures
Publication: Geo-Congress 2023
ABSTRACT
The main objective of the study is to demonstrate the use of mixed recycled aggregate (MRA) as a sustainable replacement for locally available Yamuna Sand (YS) in the design of mechanically stabilized earth (MSE) walls. The physical properties like gradation, compaction, and shear strength of MRA and YS were evaluated and compared with the Indian codal provisions. The test results showed that the gradation and compaction of MRA and YS were similar. However, the shear strength of MRA (44°–45°) was better than YS (38°–39°). The pullout testing on MRA and YS was carried out, and the results were used to design a single-tier MSE wall of heights 3, 4, 6, 8, 10, 12, and 14 m with these materials as structural backfill. The economics of using these fill materials with the cost of transporting them to 50 km has also been worked out. The pullout results showed that the interface friction (µS/GSY) of MRA was higher than YS. The economic analysis showed that using MRA was beneficial for wall heights above 8 m and can be economically transported to 50 km compared to YS.
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Geo-Congress 2023
Pages: 335 - 344
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Published online: Mar 23, 2023
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