Innovative high-technology concrete mix design method integrating rheological properties and Fracture Mechanics

Ductility; Energy capacity absorption; Fracture Mechanics; High-technology concrete (HTC); Mix design method; Rheology; Capacity absorption; Concrete mix design; Energy-capacity; Fractures mechanics; Fresh state; High-technology; High-technology concrete; Mix design methods; Strength class; Civil and Structural Engineering; Building and Construction; Materials Science (all)

Abstract :

[en] This article presents an innovative approach to concrete mix design, introducing the concept of high-technology concrete (HTC) and incorporating both the rheological and fracture behavior of the material in its fresh and hardened states. Traditionally, the design of concrete mixtures for reinforced structures has prioritized consistency and compressive strength, assuming that tensile capacity is solely provided by steel reinforcement. However, the inclusion of dispersed steel fibers has led to the development of specific guidelines, such as Annex L in the new Eurocode 2, which considers flexural strength classes, allowing for a more comprehensive evaluation of the composite's behavior. This approach not only assesses compressive strength but also flexural capacity, including aspects such as energy absorption and ductility. The new mix design methodology proposed in this study aims to align the actual behavior of the concrete with structural requirements, enabling the optimization of more efficient structural elements. In its fresh state, the desired consistency is defined through rheological parameters, while in its hardened state, target compressive and flexural strength classes are established, which are interrelated through equations derived from statistical techniques applied to a large experimental database. These equations allow for the calculation of the required volume fraction of steel fibers to achieve the target flexural strength classes, considering fiber geometric properties such as length, diameter, and aspect ratio. Additionally, the granular skeleton composition is optimized for compactness, directly impacting the modulus of elasticity and compressive strength. The experimental results validate the relevance and feasibility of this approach for designing structural elements using HTC, representing a valuable contribution to concrete technology.

Disciplines :

Civil engineering

Author, co-author :

Rosa, Ángel De La ; DIMME, Grupo de Durabilidad e Integridad Mecánica de Materiales Estructurales, Universidad Rey Juan Carlos, Madrid, Spain

Ruiz, Gonzalo ; ETSI Caminos, C. y P., Universidad de Castilla-La Mancha, Ciudad Real, Spain

Masih, Vaibhav W. ; ETSI Caminos, C. y P., Universidad de Castilla-La Mancha, Ciudad Real, Spain

ZANON, Riccardo ; University of Luxembourg

External co-authors :

yes

Language :

English

Title :

Innovative high-technology concrete mix design method integrating rheological properties and Fracture Mechanics

Publication date :

10 January 2025

Journal title :

Construction and Building Materials

ISSN :

0950-0618

eISSN :

1879-0526

Publisher :

Elsevier Ltd

Volume :

458

Pages :

139538

Peer reviewed :

Peer Reviewed verified by ORBi

Additional URL :

https://api.elsevier.com/content/article/PII:S0950061824046804?httpAccept=text/xml

Funding text :

The authors would like to acknowledge the funding received from ArcelorMittal Global R&D\u2013ArcelorMittal Fibers, Luxembourg.

Available on ORBilu :

since 02 May 2026

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