الفهرس 
NotationsOnly 14 pages are availabe for public view
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Abstract
is research examines the effect of incorporating low modulus
fibres,
fibrillated polypropylene fibres or
fibres (which are composed of both polypropylene and polymers) on the impact strength of concrete. Steel were added to fibrous concrete of low modulus of elasticity
to improve the mechanical properties of this fibrous The considered independent variables were type of fibre content.
was measured using both drop weight impact committee 544 recommendation and modified impact test.
concrete properties were determined using slump test, factor test, V-B test and fresh unit weight test. Also, ~atic mechanical properties (compressive strength, modulus of
compression, shear strength and flexural strength)
An improvement in first cracking impact strength was achieved
of fibres. The ultimate drop weight impact enhanced due to the inclusion of low modulus in concrete. For the same fibre content, the
ate drop weight impact strength of fibrillated fibre concrete ~9reater than that of monofilament fibre concrete. The ultimate
impact strength of fibrous concrete reinforced fibers of low modulus of elasticity was higher than of fibrous concrete reinforced with a blend of steel sand fibers of low modulus of elasticity.
Charpy impact strength of fibrous concrete was be several times more than that of plain concrete. impact strength of monofilament fibre concrete than that of fibrillated fibre concrete. The strength was greatly improved due to the us ion of steel fibers to fibrous concrete with fibers of modulus of elasticity.
Reinforced concrete slabs were tested using repeated loading from a falling mass and static loading. The were reinforced with a blend of 1.0 percent fibers and 0.75 percent steel fibers. After the s were subjected to different pre-impact energy values, residual static load carrying capacity and the residual the slabs were determined.
The addition of fibers approximately doubled the impact resistance of the slab models. Also, a ificant increase in the residual static load and the static toughness were achieved.