Work

OPTIMISATION OF THE BINDER IN THE “Na2O-Al2O3-nSiO2-mH2O” SYSTEM AS A MATRIX FOR THE CONDITIONING OF LIQUID RADIOACTIVE WASTE

Year: 2026

Type: article

Abstract: This paper presents the results of optimizing the composition of an aluminosilicate binder based on the main structure-forming oxides SiO2/Al2O3 and H2O/Al2O3, with the aim of obtaining an effective matrix for the conditioning of liquid radioactive waste. It is shown that during heat treatment of the samples at temperatures of 60 and 120 °C, followed by curing under normal conditions for 7 and 28 days, the binders under consideration exhibit average densities ranging from 1.58 to 1.83 g/cm³ and compressive strengths ranging from 25 to 36 MPa, which is 5.6–8 times higher than the criterion value (Rcm > 4.5 MPa). The optimal compositions of aluminosilicate binders lie within a region bounded along the X1 axis by a SiO2/Al2O3 ratio of 7.5 to 8 mol, along the X2 axis by an H2O/Al2O3 ratio of 15 to 15.5 mol, and along the X3 axis by a ground slag content ranging from 5 to 6 per cent. The aluminosilicate binders from the specified region belong to the mordenite type Na2O·Al2O3·(7.5–8)SiO2·(15–15.5)H2O and will be used for the conditioning of boron-containing liquid radioactive waste.

Source: Voprosy atomnoj nauki i tehniki. Seriâ âderno-fizičeskie issledovaniâ

DOI: 10.46813/2026-164-160

Author: Sergii Guzii

Institution: The Institute of Environmental Geochemistry of National Academy of Sciences of Ukraine

Language: English

Topic: Concrete and Cement Materials Research

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: bronze

Funder: National Academy of Sciences of Ukraine