Properties of Lightweight Fiber Reinforced Concrete


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Title: Properties of Lightweight Fiber Reinforced Concrete

Author(s): P. Balaguru and V. Ramakrishnan

Publication: Special Publication

Volume: 105


Appears on pages(s): 305-322

Keywords: air entrainment; compressive strength; flexural strength; fiber reinforced concretes; lightweight aggregate concretes; sands; metal fibers; shrinkage; water-reducing agents; workability; Materials Research

Date: 12/1/1987

Results of an experimental investigation of the properties of steel fiber reinforced structural lightweight concrete are presented. The concrete was proportioned to obtain a compressive strength of about 6000 psi (41.3 Mpa). The targeted values for slump and air content were 4 to 8 in. (100 to 200 mm) and 8 percent, respectively. Collated fibers 30 mm long with hooked ends were used for the entire investigation. The fresh concrete was tested for temperature, slump, V-B time, flow table spread, air content, and unit weight. The hardened concrete was tested for dry unit weight, compressive strength, flexural strength, splitting tensile strength, and shrinkage. In addition to these results, a comparative evaluation of normal-weight and lightweight fiber reinforced concretes is also presented. Study results show that highly workable, high-strength, lightweight fiber reinforced concrete can be produced successfully. The lightweight concrete has as much energy absorption capacity as the normal-weight concrete.