High-strength fine-grained concrete based on natural zeolite

Abstract

The results of studying the natural zeolite from the Beltau deposit are presented. To determine the comparative
relationship between the characteristics of natural zeolite obtained from the Beltau deposit and mineral additives
in the Uzbekistan construction materials market, natural zeolitic marl, microsilica, and metakaolin from the
Beltau deposit were used. It was established that the W/T ratio of the studied powders increases in the following
sequence: Beltau zeolite, crushed sand, microsilica, zeolite-containing marl, and metakaolin. Based on the
rheological parameters of water-mineral pastes, the yield stress was calculated, and their plasticizing sensitivity
to solvents of various chemical natures was determined. It was found that the pozzolanic activity of natural
zeolite for CaO absorption is equal to 510 g/l; a change in the pH of the hydrating zeolite-cement suspension
was observed, with its value decreasing to 12.7. Fine-grained cement concretes with strengths ranging from 75
to 86 MPa were obtained using natural zeolite from the Beltau deposit at concentrations of 5 and 10%.