Accession Number : ADD017258

Title :   Split Pipe Testing Device for the Measurement of Bond of Reinforcement Under Controlled Confinement.

Descriptive Note : Patent, Filed 14 Aug 92, patented 5 Jul 94,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Malvar, Javier

Report Date : 05 Jul 1994

Pagination or Media Count : 10

Abstract : This patent discloses a method and apparatus for determining the stress-slip relationship of specimens in concrete including a pipe with a plurality of longitudinal slots evenly spaced around the circumference of the pipe, a specimen and concrete block located in one end of the pipe, a confining device for applying a constant force to the circumference of the concrete block before, during and after a test, a device for measuring the displacement of the specimen relative to the concrete block, and a device for measuring the radial displacement of the concrete block.

Descriptors :   *STRESS TESTING, *REINFORCING MATERIALS, *REINFORCED CONCRETE, *PATENTS, COMPOSITE MATERIALS, CRACKING(FRACTURING), DISPLACEMENT, STRENGTH(MECHANICS), PIPES, MEASURING INSTRUMENTS, BONDING, FAILURE(MECHANICS), RADIAL STRESS

Subject Categories : Ceramics, Refractories and Glass
      Laminates and Composite Materials
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE