Accession Number : AD0652884

Title :   ULTIMATE STRENGTH OF CHOPPED WIRE REINFORCED SMALL SCALE MORTAR SLABS.

Descriptive Note : Final rept.,

Corporate Author : PROTECTIVE STRUCTURES DEVELOPMENT CENTER FORT BELVOIR VA

Personal Author(s) : Lamb,Herbert C. ; Dembo,Michael M.

Report Date : JAN 1967

Pagination or Media Count : 56

Abstract : Small scale concrete slabs reinforced with chopped wire were tested to determine ultimate strength and failure mechanism. Special techniques for adding the chopped wire were required to obtain a uniform and workable mix. Best results were obtained by blowing the 0.5 inch lengths of 6 mil wire into the mixer as the wire was sifted slowly through a screen. Three slabs were cast at Carnegie Institute of Technology and shipped to the PSDC for testing and eight were cast at the PSDC. The nominal thickness of the test slabs varied from 1/2 to 3/4 inch. All slabs were 30 inches square and supported on rollers at 29-1/4 inches. Uniformly distributed static loads were applied using a vacuum loading apparatus. Increasing the reinforcement from 2% to 4% by volume did not increase the strength of the slabs. Slabs containing 2% reinforcement had greater ultimate strength than predicted while those with 0% and 4% failed at lower than predicted loads. (Author)

Descriptors :   (*REINFORCED CONCRETE, MECHANICAL PROPERTIES), WIRE, FAILURE(MECHANICS), THICKNESS, LOADS(FORCES), CONSTRUCTION MATERIALS

Subject Categories : Ceramics, Refractories and Glass
      Construction Equipment, Materials & Supplies
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE