| Abstrakt: |
Expansive soils are one of the major regional soil deposits in India, covering an area of about 3.0 lakh sq. km. These soils in India are highly problematic, they undergo variations in volume due to swelling and shrinkage of the soil with the variation of moisture content because of its mineralogical composition. The main reason behind such behavior is due to the presence of enormous quantity of montmorillonite mineral. Because of this alternate swell and shrinkage, distress is caused to the foundations of structures laid on such soils. Extensive research is going on to find the solutions to black cotton soils. Utilization of industrial wastes like fly ash, quarry dust, silica fume, copper slag, steel slag, tannery sludge, etc., in the geotechnical engineering field will solve the problem of disposal of these waste materials. Extensive research is carried and carrying by the geotechnical investigators to reduce the swelling and improve the engineering properties of the expansive soils by using industrial waste materials. Copper and steel slag are industries waste materials which easily mixes with soil. The present study is aimed at determining the behavior of black cotton stabilized with copper and steel slag in a random manner. The soil used is a type of black cotton soil collected from Vempalli, Kadapa District, A.P., INDIA at a depth of 1.5 m from the natural ground level. The engineering properties of soils are identified. The maximum unit weight (MDD) and optimum moisture content (OMC) with different percentages of steel and copper slag (5, 10, 15& 20% by weight of soil) and combination of steel and copper slag (20% of copper slag with 5, 10, 15 & 20% of steel slag by weight of soil) were tested. Unconfined compressive strength (UCC) tests are carried out after 0, 7 & 14 day ageing periods. California bearing ratio (CBR) tests are carried for un-soaked and for 4 days soaking period for both treated and untreated soil samples with above variations. [ABSTRACT FROM AUTHOR] |
