Expansion of the raw material base for the production of small-piece materials through the use of steelmaking slags

Abstract

Expansion of the raw material base for the production of small-piece materials through the use of steelmaking slags

Romanenko I.I., Fadin A.I., Petrovnina I.N.

Incoming article date: 17.09.2023

As a result of artificial carbonization of slag, construction materials can be obtained. For this purpose, a technology has been developed for producing durable construction products as a result of accelerated carbonization of slag minerals with carbon dioxide (CO2) at elevated pressure (up to 2 MPa) and temperatures (20-60°C). The carbonates formed during the carbonization reaction act as a binder, sticking the slag particles together. Carbonized compacts after autoclave processing have technical properties equivalent to conventional concrete products made on the basis of Portland cement. The technology was developed in laboratory and production conditions by optimizing the parameters of the technological process (pressing force, temperature in the autoclave chamber, carbon dioxide pressure in the autoclave chamber and carbonization time) taking into account the increase in compressive strength and frost resistance of the samples.

Keywords: small-sized products, binder, preliminary preparation, steel slag, pressing, accelerated carbonization, minerals, carbon dioxide, strength, frost resistance