RESTRAINED SHRINKAGE CRACKING IN FIBRE REINFORCED SELF-COMPACTING HIGH PERFORMANCE CONCRETE-USING NEW EXPERIMENTAL METHOD

摘要

A new experimental technique according has been introduced to evaluate the cracking behaviour of fibre reinforced Self-Compacting High Performance Concrete(FRSCHPC).According to Austria Guidelines for fibre reinforced concrete,the mixtures with different fibre types(steel fibres and PP-fibres)and fibre contents have been cast directly into a circular panel and the assembly has been subjected to a drying environment by air exhausting to produce cracking.Lengths,widths and the maximum widths of the resulting cracks in the overlay have been measured.The using of fibres - especially the using of hybrid fibres - has been found to be very effective in reducing the restrained shrinkage cracks.