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.
Publisher: RILEM Publications SARL
Issue date: 2002-04-01
Publication year: 2002
Pages: 189 - 194
Total Pages: 6
Nb references: 17
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.
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
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