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Influence of fibres on autogenous shrinkage reduction of high performance composite
Bandelj, Branko ...
Lately, fibre reinforced concretes have been increasingly used for pavements, tunnel linings and surfaces exposed to stronger wear or erosion. At larger area of slab it tends to curl due to unequal ...concrete shrinkage along expansion gaps, which causes considerable damages of the slab. By using fibre reinforced concretes, which show small er shrinkage and higher tensile strength than normal concrete, the above mentioned problems can be considerably mitigated. The paper presents and analyses the time development of autogenous shrinkage of fibre reinforced high-performance concrete with volumetric content of steel or polypropylene fibres from 0.25% to 0.75%. Influence of steel fibre length on the autogeenous shrinkage of composite has been investigated as well. The experimental results of the composite shrinkagewere compared with the shrinkage of concrete without fibres. The results of the tests show that early autogenous shrinkage of steel fibre reinforced composite is small er than that of comparable concrete without fibres and depends on type and volumetric content of fibres.
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