Department of Civil Engineering

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Subject: search.filters.subject.Bearing capacity ratio

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    Sustainable utilization of waste tire-chips reinforced copper tailings as structural fill
    (Springer, 2020) Mittal, Ravi Kant
    One of the major wastes from mining and automobile sectors is tailings and waste tires, respectively. Their voluminous nature calls for urgent action for safe disposal and to reduce the growing threat on the environment. Under the present study, laboratory model footing and toxicity characteristics leaching procedure (TCLP) tests were conducted on tire chip-reinforced copper tailings (TRCT) to explore the feasibility of its use as structural fill and its potential impact on surroundings. Parameters considered for the laboratory study were tire chip quantity, relative density of copper tailings and depth of reinforced zone. The test results indicate that there is a significant enhancement in bearing capacity of copper tailing at all the studied strains by the addition of waste tires. Bearing capacity increased by more than nine times compared to unreinforced tailings when reinforced with 30% tire chips by weight. The TCLP tests conducted on copper tailings established that concentrations of the leached elements were well below the regulatory standards. Furthermore, a neural network model was trained via the experimental results of the tests to quickly predict the bearing capacity of TRCT for quick use in field applications. Therefore, the proposed technique can help in the effective waste management and safe disposals of large quantities of copper tailings as well as waste tires and also promoting sustainability in construction.
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    Pressure settlement behavior of tire chips reinforced sand under eccentric inclined loading
    (Springer, 2021-07-01) Mittal, Ravi Kant
    The waste management of large quantities of waste tires has become a major environmental concern over the years. To provide a viable and sustainable substitute to the current waste tire disposal techniques, attempts have been made for their possible utilization in geoengineering. The current study proposes a novel technique for the application of tire chips-reinforced sand as fill below foundations subjected to eccentric inclined loads. Model footings tests were performed on a strip footing subjected to eccentric inclined loading conditions by varying reinforcement quantity reinforcement depth, eccentricity, and inclination. It was observed that the inclusion of waste tire chips substantially enhances the bearing capacity of sand with observed improvements more than 20 times that of unreinforced sand. The observed performance under eccentric inclined was better than central vertical loading conditions indicating that it is more beneficial under eccentric inclined loading conditions. Furthermore, the tilt and horizontal displacements of the footing resting on reinforced sand reduced considerably compared to the unreinforced case. At last, a statistical model based on the test results was developed for quick estimation of the bearing capacity of tire chips-reinforced sand.