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BUS STOP STATION : Montevideo, Uruguay
Dosage rate 20kg/m of Wirand FF1 + 600g/m ofFibroMac 12
Concrete Class fc 30MPa
Thickness of slab 19 cm
Maximun joint spacing 5 m
Finishing of pavement
Floorings / Pavements
The industrial floors, road pavements etc, are technically
considered as plates resting on the soil subjected to distributed,constant or moving loads that are traditionally reinforced to endure
shrinkage and temperature stresses. Design of ground supported
slabs with conventional reinforcement is based on elastic behaviour
of the slab. This approach should not be adopted for steel fibres as
the post cracking behaviour of SFRC is significantly different from
concrete with conventional reinforcement. In fact, the post cracking
behaviour of SFRC is a markedly non linear behaviour and softenswith volume fraction of fibres often used in practice (25 40 kg/
cu.m of concrete); the conventional reinforcement retains an almost
linear relation until the reinforcement yields.
Concrete behaviour SFRC behaviour
The steel fibres redistribute the stresses and, by modifying the
mechanism of formation and opening of cracks, make the concrete
more ductile, i.e. able to maintain a certain residual load-bearing
capacity even during the post-cracking phase.
Compared with conventional reinforced concrete, SFRC offers
following advantages:
Reduction of slab thickness (no cover requirement)
PCC/DLC concrete not necessary
Larger joint spacing
No error while placing reinforcement
Less maintenance Increased output
Strain
Brittle
Strain
Tough
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Concreting for pavementin progress
Steel fibres in concreteenhance durability as theycontrol crack widths. Since theyare discrete elements, the fibresonly at the surface undergocorrosion keeping the matriximpermeable to corrosiveeffects says G. Arvind, GM,New Business Development,
Maccaferri India.
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