INFLUENCES OF SILICA NANOPARTICLE AS BINDERS ON PHYSICAL CHARACTERISTICS OF BASALT-FIBER-CONTAINING CONCRETES

Abstract

In this study, the basalt-fiber-containing concretes were prepared from a mixture of the slag of the blast
furnace, the fly ash, and the basalt-fiber. Various contents of amorphous silica nanoparticles (NPs) (0.1 –
1.0 wt%) as the binder were incorporated into the conretes to investigate their impact on the adhesion and
compressive strength. The material characterizations were assessed by employing floating microscopy,
scanning electron microscopy (SEM), nitrogen adsorption isotherms, and compressive strength test
(following the TCVN 3118:2002 standard). The presence of higher silica contents exhibited a higher density,
tighter interconnectivity between the included substituents, and a reduction in the porosity of obtained
concrete samples. Consequently, the compressive strength and the adhesion of concretes were significantly
enhanced.