Structure Formation of Concrete Systems Modified By Nonstandard Particles

Abstract

The paper studies the matrix formation of the concrete mix modified by nonstandard particles introduced in the concentration of 0 ≤ k ≤ 0.5 in the initial composition of the dispersed phase. The development of the spatial functional groups in concrete dispersions is identified, which are filled with nonstandard particles with varying degrees. The addition of nonstandard particles to the concrete matrix composition leads to the formation of strong structural bonds due to the particle contacting via the adsorption and diffusion layers appearing during the formation of sub-microcrystalline gel surrounded by newly-formed dispersions (calcium silicate hydrates). This is because the high FeO content in the initial composition of nonstandard particles, which affects the particle adhesion in the dispersed phase. The latter possess the high electrostatic and electromagnetic attraction that generates crystallization centers on the contact surface of interphase boundaries.