Y. Kusumawardaningsih, E. Fehling, H. Hardjasaputra, Y. Al-Ani, A.A.M. Aboubakr
UHPC and UHPFRC are remarkable materials which have properties with significant advantages. In addition to high compressive strength, they have higher tensile strength than conventional concrete. To study the tensile strength of UHPC and UHPFRC, a series of experimental programs have been developed at Kassel University. The effects on the fibre efficiency produced by varying the volume of the steel fibre percentage are discussed. When the results are compared to proposed equations generated in some European countries, the results are generally similar and confirmed satisfactorily. Satisfying justifications are also obtained when applied to the results for the axial tensile strength of the UHPFRC specimens. By using the proposed equations, the fibre's effective (efficiency) stresses in UHPFRC in the stages of fibre activation and pullout can be calculated. However, not all the results of this study can be confirmed by other countries (e.g. USA, Japan). Diverse circumstances taking place during the production of the material may have to be taken into account to explain the dissimilar output. Studies of the tensile strength of UHPC and UHPFRC are important, with the aim of supporting more documentation for the development of recommendations, guidelines, standards and norms; thus meeting the needs of structural design. © Published under licence by IOP Publishing Ltd.
Institute of Structural Engineering (IKI), Kassel University, Kassel, Germany; Civil Engineering Department, Universitas Negeri Semarang, Semarang, Indonesia; Civil Engineering Department, Institut Sains Dan Teknologi Pradita, Banten, Indonesia; Civil Engineering Department, Engineering Faculty, South Valley University, Aswan, Egypt
