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

Branch, J, Rawling, A, Hannant, DJ and Mulheron, M (2002) The effects of fibres on the plastic shrinkage cracking of high strength concrete Materials and Structures, 35. pp. 189-194.

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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 fibres 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 were equivalent to a composite post-crack strength of 65 kPa. Restrained ring tests were used to assess the amount of cracking which occurred during the first 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.

Item Type: Article
Divisions : Surrey research (other units)
Authors :
Branch, J
Rawling, A
Hannant, DJ
Date : 2002
DOI : 10.1007/bf02533588
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:02
Last Modified : 24 Jan 2020 23:18

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