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The effect of fibres on the plastic shrinkage cracking of high strength concrete



Title: The effect of fibres on the plastic shrinkage cracking of high strength concrete
Author(s): J. Branch, A. Rawling, D. J. Hannant, M. Mulheron
Paper category : journal
Serial title: Materials and Structures
Abreviated Serial title: Mater. Struct.
ISSN: 1359-5997
Publisher: RILEM Publications SARL
Volume: 35
Issue: 247
Issue date: 2002-04-01
Publication year: 2002
Pages: 189 - 194
Total Pages: 6
Nb references: 17
Language: English


Abstract: Plastic shrinkage cracking in concrete usually occurs during the first 5 hours after placing and therefore the mechanics of fibre reinforcement were studied during this period.
Two types of polypropylene fibres were mixed at 0.
1%by volume.
The development of bond strengths and the stresses which the f ibres could sustain across cracks were measured by uniaxial tensile tests during the first 5 hours after mixing.
Fibre stresses up to 130 MPa at 5 hours were achieved which w re quivalent to a composite post-crack strength of 65 kPa.
Restrained ring tests were used to assess the amount of cracking which occurred during the f irst 24 hours in a different high strength mix and,although the results were very variable,the fibres were found to reduce the crack area by between 40%and 85%compared with plain concrete, depending on fibre type.


Online publication: 2002-02-25
Classification: Technical Reports
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/13726


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