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Author: search.filters.author.Manandhar, SumanHas files: No

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    Comparative Study of Evaluations of Bearing Capacity Using Conventional Method and Finite Element Method
    (2024-01-01)
    Manandhar, Suman
    ;
    Karmacharya, Sunny
    ;
    Vootripruex, Panich
    ;
    Chaiyaput, Salisa
    Kathmandu Clay, also called the black clay, found near the sub-surface of the valley sediments, incorporating with its low strength and high compressibility. In this research, the vertical bearing capacity of strip footing on Kathmandu Clay was analyzed using Mohr–Coulomb soil model both in drained and undrained conditions through finite elements. The analyses were focused on the failure patterns of the footing for both drained and undrained conditions. The failure analyses showed a varying degree of effects of the friction angle of the soil both in drained and undrained conditions. The results were further compared with Vesic’s and Prandtl’s methods of evaluating bearing capacities. Hence, obtained results of simulated failure plane and the conventional one preceded by Prandtl show a good agreement between each other and validated the results.
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    Utilization of Waste Material for Stabilization of Lateritic Soil
    (2024-01-01)
    Chaiyaput, Salisa
    ;
    Ayawanna, Jiratchaya
    ;
    Manandhar, Suman
    ;
    Sae-Ueng, Songklod
    The waste materials from the manufacturing process were employed for the purpose of enhancing the strength of lateritic soil grade E, which exhibited the least suitable mechanical properties. The present study focused on the investigation of waste materials from the steel manufacturing process, namely electric arc furnace (EAF) slag and ladle furnace (LF) slag, as well as waste material from asphalt concrete plants, specifically asphalt waste dust (AWD). These waste materials were examined in relation to their potential utilization in combination with lateritic soil. The mixing ratio employed in this investigation was 10% by weight (wt%). A mixture of 5 wt% ordinary Portland cement was mixed with 90 wt% lateritic soil and 10 wt% asphalt waste dust to enhance the efficiency of lateritic soil stabilization. The efficiency of waste materials was evaluated by the California bearing ratio (CBR) test. The integration of EAF slag and LF slag, byproducts of the steel manufacturing process, significantly improved the CBR more than 5 times and 7 times, respectively, for EAF and LF mixes compared to natural lateritic soil. Furthermore, the CBR of lateritic soil blended with asphalt waste dust and Portland cement exhibited approximately 20 times higher than that of natural lateritic soil and cement-stabilized lateritic soil.