Accession Number : AD0744459

Title :   Bronze-Brazed Joints for Sealing Rebar Penetrations of Electromagnetic Pulse Shields.

Descriptive Note : Final rept. Aug-Dec 71,

Corporate Author : ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS

Personal Author(s) : Hossley,James R.

Report Date : JUN 1972

Pagination or Media Count : 62

Abstract : The objective of the study was to determine whether bronze brazing could be used to seal steel reinforcing bar penetrations through the electromagnetic pulse (EMP) shields of Perimeter Acquisition Radar Buildings (PARB) when such seal joints are required to withstand design loads without degradation of the EMP shielding properties or of the mechanical properties of the reinforcing bars. Initially, five tests were performed on three concrete-encased bars that represented full-scale penetrations of reinforcing bars (No. 11, Grade 75) through 1/4-inch-thick steel plates that represented the EMP shield. After completion of each test, the concrete was removed from the brazed joint, and dye penetrant was used to examine the joint for cracking. (Author)

Descriptors :   (*METAL JOINTS, *ELECTROMAGNETIC SHIELDING), (*NUCLEAR EXPLOSION DAMAGE, ELECTROMAGNETIC PULSES), BRAZING, BRONZE, METAL SEALS, REINFORCING MATERIALS, STEEL, PENETRATION, SHELTERS, RODS

Subject Categories : Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE