Before the actual demolition scheduled for May 22, a test blast will be carried out to determine the exact quantity of explosives needed to bring down the two 40-storeyed buildings that were declared illegal by the Supreme Court


Demolition experts are preparing to conduct a test explosion of the Supertech twin towers in Noida on April 10.


Moneycontrol’s Vandana Ramnani spoke to Utkarsh Mehta, a partner with Edifice Engineering about how the buildings will be brought down and the debris cleared. Edifice Engineering is the company selected by the Noida Authority and the Central Building Research Institute, Roorkee, to demolish the towers in collaboration with Jet Demolition from South Africa,.


The test blast ahead of the demolition of the 40-storeyed Supertech twin towers — Apex and Ceyane — in Noida will be conducted at 2.30 pm on April 10.


The purpose of the test explosion is to optimise the quantity of explosives to be used for the actual demolition on May 22. An estimated 2,500 kg to 4,000 kg of explosives may be required, but the final quantity will be ascertained after the test blast.


It is important not to use too many explosives, which will cause debris to disperse all over. Equally, underutilisation of explosives may result in the building not collapsing. The test explosion is needed to optimise and be sure of the exact quantity of explosives to be used.


This test explosion will be conducted on two floors. Columns have been selected in the basement and on the 14th floor. Two to three layers of wired mesh will be wrapped around the columns, filled with explosives. Geo-textile fabric will be laid on the ground to stop debris from dispersing in an uncontrolled manner.


The test explosion will be a 10-minute activity and residents of the surrounding areas won’t have to be evacuated.