Application of Fly Ash, Rice Husk Ash and Bentonite to Deminish the Permeability Value of Fine Sand | |
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( Volume 3 Issue 5,May 2017 ) OPEN ACCESS | |
Author(s): | |
Joyanta Maity, Saurav Pal, Mainak Mukherjee | |
Abstract: | |
To utilize and distribute the valuable water for drinking, agricultural and industrial purposes, it is necessary to store the available water in a planned environmental friendly manner. One of the most important ways to do so is being done by construction of cost effective dam at suitable location on the path of river which receives the major part of surface runoff from catchment area and discharge the same to the sea or lake. But to cut short the seepage loss from reservoir storage to permissible limit, it is essential to provide suitable core section in the earth dam, with material of very low permeability. Unfortunately soils of low permeability may not be available near the sites and large cost will be involved in transportation to bring impervious cohesive soil to the sites. Thus, costs effective method needs to be devised to use the locally available material of high permeability by modifying such soil suitably. In the present study, an experimental programme has been undertaken with the aim primarily to diminish the permeability value of locally available fine sands so that it can be used as core material of the earthen dam. Here, different percentages of fly ash, rice husk ash, and bentonite were used as admixture, to the sand and several permeability tests have been conducted on such mixed soil at respective OMC to determine the effect of such mixing on permeability value of the composite material and find the optimum percentage of mixing to effect minimum value of permeability. |
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