Accession Number : AD0676553

Title :   INVESTIGATION OF FIBER REINFORCEMENT METHODS FOR THIN SHELL CONCRETE,

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CALIF

Personal Author(s) : Haynes,Harvey H.

Report Date : SEP 1968

Pagination or Media Count : 53

Abstract : Steel fiber and asbestor fiber reinforced mortars were tested to determine their flexural strength. The general objective of the tests was to provide improved tensile strength of cementitious materials for use in thin shell structures. Good flexural behavior was obtained from steel fiber reinforced mortar by using a construction technique which produced very close fiber spacings. Fiber reinforced mortar behaved as a composite material and was analyzed using appropriate modifications of combined action theory. Increases in flexural strength of as much as a factor of 4.5 were achieved with fiber reinforced mortar; in addition, significant energy absorbing behavior was also observed. However, it was found that steel fibers did not increase the flexural strength of concrete by any significant degree and that asbestos fibers decreased the flexural strength of mortar. (Author)

Descriptors :   (*REINFORCED CONCRETE, *SHELLS(STRUCTURAL FORMS)), (*REINFORCING MATERIALS, FIBERS), TENSILE PROPERTIES, DUCTILITY, BRITTLENESS, COMPOSITE MATERIALS, STEEL, CRACKS, ASBESTOS, FLEXURAL STRENGTH, STRESSES, DEFORMATION, MODULUS OF ELASTICITY, LOADS(FORCES), COMPRESSIVE PROPERTIES

Subject Categories : Ceramics, Refractories and Glass
      Structural Engineering and Building Technology

Distribution Statement : APPROVED FOR PUBLIC RELEASE