TY - JOUR
T1 - Self-compacting high-performance fiber concrete for foundations
T2 - Part 1 -experimental verification and design considerations
AU - Walraven, Joost
AU - Droogné, Didier
AU - Grünewald, Steffen
AU - Taerwe, Luc
AU - Cotovanu, Bogdan
AU - Rovers, John
PY - 2021
Y1 - 2021
N2 - An investigation is carried out into the applicability of self-compacting high-performance fiber concrete (HPFC) in foundations. A concrete mixture has been designed with a concrete cube strength of about 110 MPa. The concrete contains 60 kg/m3 steel fibers. The properties of the HPFC developed are very suitable for structural applications, especially because the post-cracking tensile strength, provided by the fibers, is higher than the axial tensile strength of the concrete so that hardening in tension occurs after crack formation, often characterized by multiple cracking. This not only results in a high bearing capacity but as well in substantial durability. As a potential application foundation elements are considered. Experiments have been carried out to determine the pre- and post-cracking strength properties, the shear resistance of short beams with loads near to the supports, the anchorage length of reinforcing bars, and the shear capacity of pile caps. The results of the tests are used for verification of the applicability of the general design rules for fiber concrete, as found in the fib Model Code 2010, to the HPFC developed. The HPFC developed is characterized by high strength and ductility, is durable and self-compacting. The research program showed that the design of structures with the HPFC considered can be based on existing design rules with some extensions.
AB - An investigation is carried out into the applicability of self-compacting high-performance fiber concrete (HPFC) in foundations. A concrete mixture has been designed with a concrete cube strength of about 110 MPa. The concrete contains 60 kg/m3 steel fibers. The properties of the HPFC developed are very suitable for structural applications, especially because the post-cracking tensile strength, provided by the fibers, is higher than the axial tensile strength of the concrete so that hardening in tension occurs after crack formation, often characterized by multiple cracking. This not only results in a high bearing capacity but as well in substantial durability. As a potential application foundation elements are considered. Experiments have been carried out to determine the pre- and post-cracking strength properties, the shear resistance of short beams with loads near to the supports, the anchorage length of reinforcing bars, and the shear capacity of pile caps. The results of the tests are used for verification of the applicability of the general design rules for fiber concrete, as found in the fib Model Code 2010, to the HPFC developed. The HPFC developed is characterized by high strength and ductility, is durable and self-compacting. The research program showed that the design of structures with the HPFC considered can be based on existing design rules with some extensions.
KW - design recommendation
KW - experiments
KW - foundations
KW - high performance fiber concrete
KW - sustainable and durable
UR - http://www.scopus.com/inward/record.url?scp=85114925903&partnerID=8YFLogxK
U2 - 10.1002/suco.202000440
DO - 10.1002/suco.202000440
M3 - Article
AN - SCOPUS:85114925903
SN - 1464-4177
VL - 23
SP - 172
EP - 186
JO - Structural Concrete
JF - Structural Concrete
IS - 1
ER -