Ultravisokozmogljivi beton z bazaltnimi vlakni ter samočistilnimi in luminiscenčnimi površinami
Ultra high-performance concrete with basalt fibres and self-cleaning, luminescent surfaces

slovenian

2026

volume 75, issue 01

basalt fibres   luminescence   superhydrophobic   ultra-high-performance concrete   wet particle packing method

Zveza društev gradbenih inženirjev in tehnikov Slovenije
(Obvezni izvod spletne publikacije)

The study addresses the development of ultra-high-performance concrete (UHPC) based on an optimized cementitious matrix with a low water-to-binder ratio, achieved using the wet particle packing method. A volume fraction of 1 vol. % basalt fibres was incorporated into the mixture, which significantly improved material ductility, reduced brittleness, and effectively bridged the generated cracks. SEM-EDS analysis confirmed the homogeneous distribution of fibers and their strong bonding with the hydration matrix. The developed mixture achieved a compressive strength of 138.5 MPa and a flexural strength of 12.5 MPa, which, despite the partial replacement of cement with metakaolin, confirms the very high mechanical performance of UHPC. To obtain additional multifunctional properties, such as pronounced water repellency and luminescent light emission, a double-layer biomimetic surface treatment based on SiO2 nanoparticles and luminescent powder was applied. Wettability tests demonstrated stable superhydrophobic behaviour with contact angles of up to 154.9°, while the luminescent layer enabled emission of visible green light at approximately 520 nm. The results confirm that the synergy of the optimized UHPC matrix, basalt fibres, and functional surface layers significantly expands the applicability of concrete, particularly in sustainably designed elements where crack control and water protection are crucial, while also providing passive nighttime visibility without an external energy source.

05.10.2026