Terminology - B

  • BENCH MARK: Marks of known separation applied to a specimen and used to measure strain.
  • BLISTER: A cavity or sac that deforms the surface of a material.
  • BLOOM: A coating or efflorescence creating a discoloration or change in appearance of the surface of a rubber product caused by the migration of a liquid or solid to the surface.
  • BULK DENSITY: The weight in air, of a unit volume of material, including both permeable and impermeable voids, normal to the material
  • BULKHEAD: A flat boxlike structure used to shut off water flow in a dam that is located upstream from other gates or equipment, enabling repair or maintenance work.