TY - GEN
T1 - Compressive Strength and Expansion Characteristics of BOFS-Based Geopolymer Mortar Under Different Curing Regimes
AU - Onopriyenko, Zarina
AU - Shon, Chang Seon
AU - Zhang, Dichuan
AU - Kim, Jong Ryeol
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.
PY - 2025
Y1 - 2025
N2 - The steel industry produces basic oxygen furnace slag (BOFS), a secondary material that might be utilized in the building sector in place of natural aggregates. The problem with using BOFS as a component of an aggregate is that it causes volume growth within the matrix of concrete when free magnesium oxide (f-MgO) or free calcium oxide (f-CaO) constituents in BOFS combine to generate magnesium hydroxide (Mg(OH)₂) or calcium hydroxide (Ca(OH)₂). Two possible solutions to the BOFS expansion issue are CO₂ curing (mineral sequestration) and the geopolymerization process. This research examined the characteristics of expansion and compressive strength of geopolymer mortar based on BOFS under various curing conditions and times. Four distinct curing regimes air, water, steam, and a combination of steam and CO₂ were assessed. Additionally, two different durations of 6 and 12 h for both CO2 and steam curing were compared. The strength of compression associated with the BOFS-based geopolymer is increased by combining CO₂ and steam curing and by bare steam curing, according to the results, while the curing regime does not affect the water expansion characteristics. For the development of compressive strength and stabilizing the water expansion curve fluctuation, a 12 h curing period is preferable than a 6 h curing period, for both steam and CO₂ curing.
AB - The steel industry produces basic oxygen furnace slag (BOFS), a secondary material that might be utilized in the building sector in place of natural aggregates. The problem with using BOFS as a component of an aggregate is that it causes volume growth within the matrix of concrete when free magnesium oxide (f-MgO) or free calcium oxide (f-CaO) constituents in BOFS combine to generate magnesium hydroxide (Mg(OH)₂) or calcium hydroxide (Ca(OH)₂). Two possible solutions to the BOFS expansion issue are CO₂ curing (mineral sequestration) and the geopolymerization process. This research examined the characteristics of expansion and compressive strength of geopolymer mortar based on BOFS under various curing conditions and times. Four distinct curing regimes air, water, steam, and a combination of steam and CO₂ were assessed. Additionally, two different durations of 6 and 12 h for both CO2 and steam curing were compared. The strength of compression associated with the BOFS-based geopolymer is increased by combining CO₂ and steam curing and by bare steam curing, according to the results, while the curing regime does not affect the water expansion characteristics. For the development of compressive strength and stabilizing the water expansion curve fluctuation, a 12 h curing period is preferable than a 6 h curing period, for both steam and CO₂ curing.
KW - Basic oxygen furnace slag aggregate
KW - Compressive strength
KW - Curing regimes
KW - Geopolymerization
KW - Mineral sequestration
KW - Water expansion
UR - https://www.scopus.com/pages/publications/105002157752
UR - https://www.scopus.com/pages/publications/105002157752#tab=citedBy
U2 - 10.1007/978-3-031-78295-4_24
DO - 10.1007/978-3-031-78295-4_24
M3 - Conference contribution
AN - SCOPUS:105002157752
SN - 9783031782947
T3 - Lecture Notes in Mechanical Engineering
SP - 217
EP - 226
BT - Proceedings of the 8th International Conference on Manufacturing, Material and Metallurgical Engineering, ICMMME 2024
A2 - Agarwal, Ramesh K.
PB - Springer Science and Business Media Deutschland GmbH
T2 - 8th International Conference on Manufacturing, Material and Metallurgical Engineering, ICMMME 2024
Y2 - 23 July 2025 through 25 July 2025
ER -