Bitumen

A hard or semi-hard asphaltic residue; often used in construction as a waterproof/barrier layer.

Bituminous (Coating)

Of or containing bitumen; as asphalt or tar.

Blind Shield

Non-mechanical shield which has a controlled and partly sealed face.

BOD

Biological Oxygen Demand; a measure of the need for oxygen by organic processes.

Bonds

BidThe offer or process of the bidder submitted on the prescribed form setting forth the prices for the work to be performed., performance and payment bonds and other instruments of security furnished by the contractor and his surety in accordance with the contract documents and in accordance with the law of the place of the project.