Backfill - Materials used in refilling a cut or other excavation, or the act of such refilling after the concrete foundation pour.

Bag (of cement) - A quantity of cement; 42.6 kg in the United States, 39.7 kg in Canada; portland or air-entraining portland cement, or as indicated on the bag for other kinds of cement to make concrete.

Ballast - Heavy material, such as water, sand or metal which has no function in a machine except to increase its weight. Most often used in concrete mixers

Bank - A mass of soil rising above an average level. Generally, any soil which is to be dug from its natural position. Sometimes over the concrete surface plate

Bank Gravel - A natural mixture of cobbles, gravel, sand and fines for concrete.

Bar - A member used to reinforce concrete, usually made of steel.

Base - The course or layer of materials in a roadway section on which the actual pavement is placed. It may be of different types of materials ranging from selected soils to crushed stone or gravel.

Batch - Quantity of concrete or mortar mixed at one time.

Batch Weights - The weights of the various materials (cement, water, the several sizes of aggregate, and admixtures) that compose a batch of concrete.

Berm - An artificial ridge of earth, generally side-slopes of a roadbed made of concrete

Binder - Fines which fill voids or hold gravel together when dry. Hardened cement paste in concrete

Bleed: To have water seep to the surface of the cement paste due to settling making a weak concrete surface

Bleeding - The self-generated flow of mixing water within, or its emergence from, freshly placed concrete or mortar.

Blistering - The irregular rising of a thin layer of placed mortar or concrete at the surface during or soon after completion of the finished operation

Bond Breaker - A material used to prevent adhesion of newly placed concrete from other material, such as a substrate.

Bonded Concrete Overlay - Thin layer of new concrete (2-4 inches) placed onto slightly deteriorated existing concrete pavement with steps taken to prepare old surface to promote adherence of new concrete.

Borrow Pit - An excavation from which fill material is taken. Usually for Concrete below grade backfill

BPR - U.S. Bureau of Public Roads for the Concrete and Asphalt Industry

Broom - The surface texture obtained by stroking a broom over freshly placed concrete. A sandy texture obtained by brushing the surface of freshly placed or slightly hardened concrete with a stiff broom.

Bug Holes - Small regular or irregular cavities, usually not exceeding 15 mm in diameter, resulting from entrapment of air bubbles in the surface of formed concrete during placement and compaction.

Bull Float - A tool comprising a large, flat, rectangular piece of wood, aluminum, or magnesium usually 20 cm wide and 100 to 150 cm long, and a handle 1 to 5 m in length used to smooth unformed surfaces of freshly placed concrete.

Burlap - A coarse fabric of jute, hemp, or less commonly flax, for use as a water-retaining cover for curing concrete surfaces; also called Hessian

Butt Joint - A plain square joint between two concrete slabs.

BUREC - U.S. Bureau of Reclamation with regards to Concrete and Asphalt