When soil undergoes consolidation it settles, which can cause uneven and sometimes damaging movements in structures built on the soil. Terzaghi’s 1D consolidation theory significantly underestimates the rate of consolidation in several circumstances where horizontal pore water flow occurs. In such instances, the flow in vertical along with radial directions must be considered to estimate the rate of consolidation. An experimental investigation was carried out in this study to assess the consolidation properties of the soil by 3D consolidation apparatus with two possible drainage paths. Furthermore, the addition of bottom ash percentages on the consolidation behaviour of bottom ash mixed soil is also investigated. The experimental results show that the water extraction rate increases when the radial flow is considered along with the vertical flow. A higher co-efficient of consolidation is observed when the flow is permitted in all possible directions than the flow permitted only in the vertical direction. An increasing co-efficient of consolidation is observed with the increased value of bottom ash content in the soil. The current study is beneficial in those grounds where soft, saturated soil exists in the construction field.