GAS SILICATE CONCRETE BASED ON ACTIVATED WASTE ENERGY

Bulyga L. Stanevich V. Nikiforova V. Aryngazin K. Ramazanov A.
2025 GEOMATE International Society

International Journal of GEOMATE
2025 #28 Issue 125 56 - 63 pp.

Ash and slag dumps represent valuable secondary raw materials, though currently underutilized, leading to significant storage costs. Utilizing these materials involves several challenges, including advancing gas-silicate composition and improving production technology. This research presents findings on the fractional composition of ash and slag wastes, which are used as fillers in gas-silicate production. Due to significant variations in the chemical composition, fraction sizes, and structure of these wastes, mechanical processing is needed to stabilize their properties. The glassy surfaces of ash particles hinder binder hydration, so component activation—particularly of autoclaved gas silicate (using sand, slag, and dry-selected ash)—has been explored. A technology has been developed to activate these components with an aluminous additive. Optimal compositions of gas-ash and gas-slag silicates were determined. The study examined the effects of replacing a portion of Portland cement with activated fly ash or slag in the presence of an alumina additive on the properties of autoclaved gas-silicate. The relationship between the physical and mechanical properties of gas-silicate and the type and quantity of fine filler was established. Results showed that the average density of cellular concrete decreased while strength characteristics were maintained, attributed to a more uniform granulometric composition of activated components. The high specific surface area of the composite binder enhanced hydration quality. Scaling these results could contribute to solving environmental challenges by reducing waste and enhancing material performance.

Activation technology , Additives , Ash and slag wastes , Characterization improvement. , Composite binder , Gas-silicate concrete

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Faculty of Architecture and Construction, Toraighyrov University, Kazakhstan

Faculty of Architecture and Construction

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