Possibility Of Concrete Demolition Waste & Rubber Tyre Waste In Stone Column To Improve Bearing Capacity Of Clayey Soil

Abstract

Bearing capacity is a very important parameter of the soil. As the construction of the superstructure mainly depend upon foundations of that structure, whole structure has been erected on the soil of suitable bearing capacity. But if that value of bearing capacity is on lower side then improvement of soil can be done. The manner of improvement may be use of piles, piers, cassions and stone columns. Material to be used  in  stone  column are aggregates up to size 100mm. Waste  materials  generated such  as Rubber and Concrete  demolition waste  can be used as replacement  of  aggregates.

  In this present study clayey of medium plasticity (CI) used was collected from village lohatbaddi,distt Ludhiana (PB). Concrete demolition waste (CDW) was collected from waste of cubes tested in concrete laboratory. Rubber tyre waste (RTW) in crumbed powder form was collected from Speedways Tyre industry, Transport Nagar, Ludhiana. In this study an attempt was made to use CDW and RTW in improving bearing capacity of the soil. The percentage of RTW: CDW (0:100, 20:80, 40:60, 60:40, 80:20, 100:0) was used in this present study. After the optimization of RTW: CDW (20:80) for single column of L/D ratio 6 [1]. Then this  percentage  was  used  for  L/D ratios 3, 6 & 10 for the  number of columns 1,2,3,4&5 [2].The allowable  bearing  capacity  for L/D = 6 is more than for 3 & 10 [8] and  it  was  maximum for  five number of columns. The allowable bearing capacity with five stone columns was 2-3 times the bearing capacity of soil without stone columns.