TY - GEN
T1 - Comparative toughness testing of fiber reinforced concrete
AU - Chen, L.
AU - Mindess, S.
AU - Morgan, D. R.
AU - Shah, S. P.
AU - Johnston, C. D.
AU - Pigeon, M.
N1 - Funding Information:
This study was supported primarily by the Natural Sciences and Engineering Research Council of Canada, through its support for the Network of Centres of Excellence on High-Performance Concrete. The contributions of the other participating laboratories (University of Calgary, Universite Laval, Northwestern University, and HBT AGRA) are also gratefully acknowledged.
Publisher Copyright:
© 1995 American Concrete Institute. All rights reserved.
PY - 1995/8/1
Y1 - 1995/8/1
N2 - Round-robin tests of the flexural toughness of fibre reinforced concrete were carried out using six different testing machines in five different laboratories. Six groups of beams, including a plain concrete control, two different volumes of polypropylene fibres, and three different volumes of steel fibres were tested in accordance with ASTM CIO 18, with special care taken to exclude the "extraneous" deflections due to deformations at the specimen supports. The results from each laboratory were used to compute the ASTM C1018 toughness indices I5, Iio, I20,130 and I50, and the corresponding residual strength factors Rs.io, Rio,2o, R20.30 and Rso.so- In addition, the JSCE Toughness and Toughness Factor were also computed. It was found that, although the load vs deflection curves were inherently quite variable, in most cases there was no significant difference amongst the participating laboratories, except for those mixes with a very low toughness. It was found that the ASTM C1018 toughness indices, particularly I5 and Iio, did not discriminate very well amongst the different fibre contents or different fibre types; the JSCE parameters were rather more successali in this regard.
AB - Round-robin tests of the flexural toughness of fibre reinforced concrete were carried out using six different testing machines in five different laboratories. Six groups of beams, including a plain concrete control, two different volumes of polypropylene fibres, and three different volumes of steel fibres were tested in accordance with ASTM CIO 18, with special care taken to exclude the "extraneous" deflections due to deformations at the specimen supports. The results from each laboratory were used to compute the ASTM C1018 toughness indices I5, Iio, I20,130 and I50, and the corresponding residual strength factors Rs.io, Rio,2o, R20.30 and Rso.so- In addition, the JSCE Toughness and Toughness Factor were also computed. It was found that, although the load vs deflection curves were inherently quite variable, in most cases there was no significant difference amongst the participating laboratories, except for those mixes with a very low toughness. It was found that the ASTM C1018 toughness indices, particularly I5 and Iio, did not discriminate very well amongst the different fibre contents or different fibre types; the JSCE parameters were rather more successali in this regard.
KW - Fiber reinforced concretes: fibers
KW - Flexural strength
KW - Polypropylene fibers
KW - Steels
KW - Strength
KW - Tests: toughness
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M3 - Conference contribution
AN - SCOPUS:33644679781
T3 - American Concrete Institute, ACI Special Publication
SP - 41
EP - 75
BT - Testing of Fiber Reinforced Concrete
A2 - Stevens, David J
A2 - Banthia, Nemy
A2 - Gopalaratnam, Vellore S.
A2 - Tatnall, Peter C.
PB - American Concrete Institute
T2 - Testing of Fiber Reinforced Concrete at 1995 ACI Spring Convention
Y2 - 5 March 1995 through 10 March 1995
ER -