Surat: The Surat airport will strengthen its airstrip using steel slag as per the International Civil Aviation Organisation (ICAO) recommendations and Civil Aviation Requirements (CAR), according to airport authorities.
As per ICAO, the basic strip at a code C airport has to be 140 metres wide, well graded area with a minimum 15 per cent California Bearing Ratio (CBR) — strength of subgrade soil — at a depth of 150 millimetres from the top ground level. The strip at Surat airport is of size as recommended by ICAO, CAR and the Directorate General of Civil Aviation (DGCA). However, in order to fulfil the criteria of recommended strength, the ground improvement of basic strip needs to be done as the area consists of highly expansive soil (black cotton soil) with very low CBR.
Work of stabilisation of basic strip will be taken up to raise the CBR value to the required level in order to ensure safety of an aircraft in emergency situations if it steers off the runway. The desired strength at 150 mm below ground level shall help the disoriented aircraft to stop in gradual manner, without causing major damage.
02/07/22 Kamaal Saiyed/Indian Express
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