Can a government (Federal) contact be used as collateral on a business loan?

Can a US government contract (if your awarded one) at the same time be used for the acquisition of real estate to help perform the contract. Say, for the property, you finance 80%-can the other 20% downpayment come out of the US government award (along with the rest of the contract as a kind of collateral) which is used as the income producing part. Thanks