PROPERTIES OF FIBER REINFORCED STRUCTURAL LIGHTWEIGHT CONCRETE

The authors of this paper present the results of an experimental study of the behvaior of fiber reinforced structural lightweight concrete. Properties investigated include workability and behavior under compression, splitting tension, and flexure. The independent variables were composition of fine aggregate, fiber content, fiber length, and presence of silica fume. Fine aggregate consisted of all lightweight aggregate or combinations of lightweight aggregate and nautral sand. Two fiber lengths were investigated with various fiber contents. The lightweight aggregate used was made of expanded shale. High-range water-reducing admixture was used to improve workability. An air-entraining admixture was used to reduce the unit weight and improve workability. Results reveal that a compressive strength of approximately 42 MPa can be obtained for concretes with an equilibrium density of 1650 kg/m3. Fibers increase flexural and splitting tensile strengths significantly. The modulus of elasticity is enhanced by about 30 percent. Fiber reinforced concrete displays excellent ductility.

Language

  • English

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Filing Info

  • Accession Number: 00719313
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 24 1996 12:00AM