TY - JOUR

T1 - Crystallization-induced stabilization of foam glass aggregates for heat-insulating concrete

AU - Kazantseva, Lidia K.

AU - Mikhno, Anastasia O.

AU - Miroshnichenko, Leonid V.

N1 - Funding Information: We thank this article/paper's reviewer (anonymous) for the constructive comments that helped improve the manuscript and professor Young‐Wook Kim for the editorial handling. The research was carried out within the state assignment of IGM SB RAS and was supported by Russian Foundation for Basic Research (18‐08‐00857). Equipment of the Shared‐Use Analytical Center at the V.S. Sobolev Institute of Geology and Mineralogy (Novosibirsk) was used for analytical work. Publisher Copyright: © 2021 The American Ceramic Society Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/9/1

Y1 - 2021/9/1

N2 - Resistance of the porous glass-based aggregates to alkali-silicate reaction (ASR) was the focus of this study. ASR was studied in mixtures of aggregates with water alkali solutions simulating alkali media of row concrete. Granular foam glass with homogeneous glass in the pore walls is ASR-active, which leads to the leaching of glass and to the formation of hydrated Na-silicate gel, Ca-silicate, and aluminosilicate on the aggregate surfaces. Mitigation of ASR-activity in granular foam glass was achieved by thermo-induced crystallization (850-900ºC) of micro- and nanoscale crystals (Na4CaSi3O9 and/or Na2Ca3Si6O16) in the pore walls with the formation of granular glass-ceramic foams. The main characterization methods were scanning electron microscopy, x-ray powder diffraction analysis, x-ray fluorescence, atomic emission spectrometry, and pH analysis.

AB - Resistance of the porous glass-based aggregates to alkali-silicate reaction (ASR) was the focus of this study. ASR was studied in mixtures of aggregates with water alkali solutions simulating alkali media of row concrete. Granular foam glass with homogeneous glass in the pore walls is ASR-active, which leads to the leaching of glass and to the formation of hydrated Na-silicate gel, Ca-silicate, and aluminosilicate on the aggregate surfaces. Mitigation of ASR-activity in granular foam glass was achieved by thermo-induced crystallization (850-900ºC) of micro- and nanoscale crystals (Na4CaSi3O9 and/or Na2Ca3Si6O16) in the pore walls with the formation of granular glass-ceramic foams. The main characterization methods were scanning electron microscopy, x-ray powder diffraction analysis, x-ray fluorescence, atomic emission spectrometry, and pH analysis.

KW - alkali-silica reaction

KW - foam glass

KW - glass crystallization

KW - glass-ceramic foams

KW - heat-insulating concrete

KW - porous glass-based aggregates

UR - http://www.scopus.com/inward/record.url?scp=85105811415&partnerID=8YFLogxK

U2 - 10.1111/ijac.13771

DO - 10.1111/ijac.13771

M3 - Article

AN - SCOPUS:85105811415

VL - 18

SP - 1773

EP - 1782

JO - International Journal of Applied Ceramic Technology

JF - International Journal of Applied Ceramic Technology

SN - 1546-542X

IS - 5

ER -