Low-velocity impact behavior of functionally graded cement-based composites: Combining SFRC, UHPC and textile-reinforced UHPC

Braga de Carvalho Nunes J.J.; Rodrigues de Souza F.; Krahl P.A.; Mansur de Castro Silva R.; Pires de Paula P.; de Andrade Silva F.

Low-velocity impact behavior of functionally graded cement-based composites: Combining SFRC, UHPC and textile-reinforced UHPC

Tipo

Artigo

Data de publicação

2025

Periódico

Cement and Concrete Composites

Citações (Scopus)

0

Autores

Braga de Carvalho Nunes J.J.
Rodrigues de Souza F.
Krahl P.A.
Mansur de Castro Silva R.
Pires de Paula P.
de Andrade Silva F.

Resumo

© 2025 Elsevier LtdFunctionally graded cement-based materials can be designed to exhibit high energy dissipation capacity by applying materials in specific positions according to the loading protocol. A layer of Ultra-High-Performance Concrete (UHPC) combined with carbon textiles positioned in the most critical zone is a promising solution to improve the behavior of cement-based composites against impact, which has not yet been fully clarified. This study presents a novel two-layer composite approach, combining Steel Fiber Reinforced Concrete (SFRC) with UHPC and carbon textiles, tested under drop weight impact. Three different energy levels were investigated: 112.8, 225.6, and 338.4 J. The UHPC thin layers were reinforced with smooth or steel hooked end fibers, and a group was combined with Textile Reinforced Concrete (TRC). SFRC and UHPC were cast simultaneously, improving the bond between the matrices. The results highlight that SFRC + UHPC with steel hooked fibers have better impact performance than SFRC + UHPC with smooth fibers, exhibiting better crack opening control, higher impact resistance, and lower deflection. Additionally, the same trend was observed when the UHPC layer was reinforced with TRC, which demonstrated a significant reduction in residual displacements and crack openings, as well as improved energy absorption capacity, with increases of up to 370% compared to conventional specimens, highlighting their potential for high-impact applications.

Assuntos Scopus

Carbon textile reinforced concrete , Cement based composites , Crack opening , Fiber-reinforced concretes , Functionally graded , High-performance concrete , Impact loadings , Steel fiber reinforced concretes , Textile reinforced concretes , Ultra high performance