Adani Group all set to secure one of Asia's biggest loans, worth $3.5 billion, to fund purchase of Ambuja Cements Billionaire Gautam Adani-controlled Adani Group is closing in on a $3.5 billion loan to refinance existing debt that was taken out to fund the purchase of Ambuja Cements Ltd., in what would be the latest sign of confidence among creditors in the conglomerate.