Conference papers http://210.212.227.212:8080/xmlui/handle/123456789/58 2026-05-17T00:01:39Z 2026-05-17T00:01:39Z Amal, Azad Sahib http://210.212.227.212:8080/xmlui/handle/123456789/127 2022-03-22T09:59:25Z 2020-01-01T00:00:00Z

A review of isotache modeling and secondary consolidation behavior of soft clays Amal, Azad Sahib Secondary consolidation of soils has gained much importance as a major contributor in the long term settlements of soft clays. In the scenario where constructions on such problematic soils are increasing, accurate prediction of long term settlements is very challenging. This paper reviews the evolution of the secondary compression characteristics from the concept of Cα to the creep isotaches. The generation of the 3 D elastic viscoplastic model from the equivalent time (isotache) approach is also discussed in this paper. This model is an extension of Maxwell’s rheological model. With relevance to Indian soils, the secondary compression characteristics of Kuttanad and Cochin marine clay are also reported in this paper.

2020-01-01T00:00:00Z Amal, Azad Sahib http://210.212.227.212:8080/xmlui/handle/123456789/126 2022-03-22T09:52:00Z 2010-12-01T00:00:00Z

Evaluation of Various Electrode Configurations in Electro-Osmosis Amal, Azad Sahib Electro-Osmosis technology is a proven stabilization technique on fine-grained soils. When an electric field is applied to a mass of soil, the pore fluid moves from the region of anode to cathode along with the positive ions that move towards the negative electrode; the net effect being reduced water content and improved strength near the region of anode. From an elementary study, it was established that copper and its alloys form the best electrode material for electro-osmosis and that a uniform increase of resistance in soil during the process increases the efficiency of the process. Usually, application of this technique on field does not follow any particular configuration of electrodes. In this study, different patterns of arrangement of a set of four electrodes were implemented to study the effects of each of the arrangement. It was found that a tetrahedral configuration using one central anode and three cathodes resulted in better drainage of water by 33% whereas that with a central cathode and three anodes resulted in better improvement of strength by 76%.

2010-12-01T00:00:00Z Amal, Azad Sahib http://210.212.227.212:8080/xmlui/handle/123456789/125 2022-03-22T09:47:33Z 2018-12-01T00:00:00Z

Electro-osmosis: A review from the past Amal, Azad Sahib Electro-osmosis is a powerful technique, as a means of dewatering soils of high compressibility and moisture content. Electro-osmosis is an established technique and has been investigated by many researchers as long as a century ago. The treatment factors that contribute to the effectiveness of electro-osmotic consolidation are: type of electrode, voltage gradient, polarity reversal, current intermittence, and duration of treatment. Copper, mild steel and stainless steel in different shapes and forms have been used as electrodes. Electrokineticgeosynthetics (EKG) used in electro-osmotic consolidation applications provide electrokinetic function in addition to the filtration and drainage functions. The EKG electrodes are less susceptible to corrosion due to the polymeric cover or treatment against corrosion. Even though most studies claim the effectiveness of this technique, the procedure is not widely accepted in the industry due to the risks and costs involved. This paper aims to review the suitability of this technique on soils around the world. Also, this paper looks closely into the properties of the soil that make it ideal for the success of this technique. With reference to Indian soils, the results of electro-osmosis studies on Kuttanad clay, are presented

2018-12-01T00:00:00Z Amal, Azad Sahib http://210.212.227.212:8080/xmlui/handle/123456789/124 2022-03-19T07:07:18Z 2017-03-01T00:00:00Z

ELECTRO-OSMOSIS STUDIES ON KUTTANAD CLAY Amal, Azad Sahib The Region of Kuttanad in the State of Kerala, India, is known as the rice bowl of Kerala. The region is famous for the black clayey silts and silty clays that it possess, which makes them quite suitable for agriculture. However this being a phenomenal area covering more than 1,100 sq km in the central Travancore region, is currently facing adverse issues following crop losses, infertility and settlement of structures. The presence of high water table also makes conveyance challenging for the residents of the area. Various ground improvement techniques using lime, rice husk ash, cement, coir etc have been studied on Kuttanad Soil. Electrokinetic Stabilization has not been much studied in this region. In this context, this paper presents a few results based on the Stabilization of Kuttanad Clay using Electro-Osmosis; done in the laboratory using two moulds (30 cm x 30 cm x 30 cm and 90 cm x 90 cm x 90 cm). Copper plates of uniform shape and size were used as electrodes and various voltage gradients were applied across the soil mass contained between the electrodes. The process of each experiment using a particular voltage gradient at a particular spacing of electrodes yielded unique results that can be compared with the other sets of experiments. The soil was tested properties before and after the test. It was observed that with reduction in spacing between electrodes and increase in potential gradient, the undrained shear strength for treated clay is high. However on a large scale, an increased potential gradient does not give a proportionate increase in strength

2017-03-01T00:00:00Z