29.6 A very soti clay deposit, over which a road embankment that is 20 m wide at ground level is to be constructed, can be stabilized (i) by constructing overlapping columns of clay with 5% cement using deep mixing technique or (ii) by replacing 50% of clay by gravel columns using stone column technique. The clay deposit is 6 m deep. Compare the cost of treatment if gravel is available at Rs. 800 per mand cement is available at Rs. 300 per kN. The cost of constructing cement columns or gravel columns is about the same and only the cost of materials needs to be considered. 29.6 A very soti clay deposit, over which a road embankment that is 20 m wide at ground level is to be constructed, can be stabilized (i) by constructing overlapping columns of clay with 5% cement using deep mixing technique or (ii) by replacing 50% of clay by gravel columns using stone column technique. The clay deposit is 6 m deep. Compare the cost of treatment if gravel is available at Rs. 800 per mand cement is available at Rs. 300 per kN. The cost of constructing cement columns or gravel columns is about the same and only the cost of materials needs to be considered