TY - JOUR
T1 - Toughness measurement - The need to think again
AU - Barr, B.
AU - Gettu, R.
AU - Al-Oraimi, S. K.A.
AU - Bryars, L. S.
N1 - Funding Information:
The authors are grateful for support received from Spanish DGICYT Grants PB90-0598, MAT93-0293 and PB93-0955t o the UPC and a Welsh Office Grant to UWCC. Funding for the collaboration between UWCC and UPC was provided by the Action Integrada Grant 251-B from the British Council and the Spanish Ministry of Education and Science.
PY - 1996
Y1 - 1996
N2 - The first part of the paper reviews a number of concurrent developments which have taken place in recent years in the concrete research area. The developments include the commercial development of FRC materials, the proposals for evaluating the enhanced performance of FRC materials, the development of high performance (high strength/brittle) concretes, the application of fracture mechanics to concrete together with the revolution in testing machines with the introduction of closed-loop testing. The limitations of current standards and guidelines for evaluating the toughness of FRC materials are also reviewed and proposals for overcoming these limitations are advanced. It is proposed that notched beams, subjected to three-point loading, rather than unnotched beams subjected to four-point loading should be used for toughness measurement and that the deformation of the beams should be measured directly from the specimen rather than through the testing machine.
AB - The first part of the paper reviews a number of concurrent developments which have taken place in recent years in the concrete research area. The developments include the commercial development of FRC materials, the proposals for evaluating the enhanced performance of FRC materials, the development of high performance (high strength/brittle) concretes, the application of fracture mechanics to concrete together with the revolution in testing machines with the introduction of closed-loop testing. The limitations of current standards and guidelines for evaluating the toughness of FRC materials are also reviewed and proposals for overcoming these limitations are advanced. It is proposed that notched beams, subjected to three-point loading, rather than unnotched beams subjected to four-point loading should be used for toughness measurement and that the deformation of the beams should be measured directly from the specimen rather than through the testing machine.
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U2 - 10.1016/0958-9465(96)00021-2
DO - 10.1016/0958-9465(96)00021-2
M3 - Article
AN - SCOPUS:0030216748
SN - 0958-9465
VL - 18
SP - 281
EP - 297
JO - Cement and Concrete Composites
JF - Cement and Concrete Composites
IS - 4 SPEC. ISS.
ER -