Surface soil enhancement for MSW lining by silica fume

Abstract

The improvement of engineering properties for surface soils is of significance through the resources shortage. Therefore, the present study focused on determined the silica fume influence as industrial waste products on engineering characteristics of surface available soil as a soft soil with poor engineering properties to enhance the hydraulic properties to be used for landfill lining layer and prevent migration leachate for surrounding environment. Silica fume was added to the soil to enhance the permeability with 5%, 10% weight ratio. Then, Atterberg limits and permeability tests were conducted. The results indicated that silica fume increase the flow and plasticity characteristics of the stabilized soils. Addition of 5% and 10% silica fume to surface soil reduce the permeability up to 46% and 57% respectively.. It was concluded that silica fume filled pore space between soil particles and a dense matrix were formed. This textural event caused an improvement in permeability characteristics which represent the major concern in design MSW lining layer.

Evaluation The Leachate Characteristics and its Impacts on Groundwater Contamination Around Al-Diwaniyah Open Dumpsite

“…Groundwater located close to landfills or dumpsites is severely contaminated due to percolation of landfill leachate making it undesirable for drinking, and other household purposes. Many researches have been conducted to limit leachate percolation or improve its qualities; such as those undertaken by Hussain, and other researchers to improve the hydraulic characteristics of surface soil for landfill liner, using silica fume to fill pore space between soil particles which led to limiting leachate migration [7]. Abud et al focused on modifying leachate characteristics using a lime and sawdust waste mixture that assisted in enhanced solid waste stabilization [8].…”