Axial Pullout Resistance and Interface Direct Shear Properties of Geogrids in Pond Ash

Karnamprabhakara, Bhargav Kumar and Balunaini, Umashankar and Arulrajah, Arul and Evans, Robert (2021) Axial Pullout Resistance and Interface Direct Shear Properties of Geogrids in Pond Ash. International Journal of Geosynthetics and Ground Engineering, 7 (2). ISSN 2199-9260

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Presently, pond ash is accumulated in large quantities in thermal power plants. There is potential for large-volume utilization of pond ash as a fill material. Applications involving mechanical stabilization of fills constructed with geogrid-reinforced pond ash is explored in the study. A systematic experimental program was carried out to evaluate the interface direct shear strength and axial pullout resistances of four to eight different uniaxial polyester geogrids embedded in pond ash. Geogrids of varying tensile strengths and opening area ratios were considered. No significant difference in the interfacial shear strengths was observed among the four different geogrids tested. Based on the interface direct shear strengths at peak and critical states, the efficiencies of geogrids were found to range from 62 to 83%. The axial pullout resistances of geogrids in pond ash were found to be high for grids with high tensile strength. Finally, based on extensive pullout test results, empirical equations were fitted to estimate the axial pullout resistance of uniaxial geogrids embedded in pond ash corresponding to two front-end axial pullout displacements of 30 mm and 60 mm. The proposed equations were found to agree very closely with the experimental results (R2 = 0.95).

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IITH Creators:
IITH CreatorsORCiD
Karnamprabhakara, Bhargav KumarUNSPECIFIED
Balunaini, UmashankarUNSPECIFIED
Item Type: Article
Uncontrolled Keywords: Direct shear strength; Empirical equations; Experimental program; High-tensile strength; Interfacial shear strength; Mechanical stabilization; Reinforced pond ash; Thermal power plants
Subjects: Civil Engineering
Divisions: Department of Civil Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 16 Jul 2021 07:06
Last Modified: 16 Jul 2021 07:06
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