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A platform for research: civil engineering, architecture and urbanism
Preparation and hydration process of copper slag-granulated blast furnace slag-cement composites
https://orcid.org/0009-0007-5985-5969
https://orcid.org/0009-0002-2147-5956
Abstract Replacement of cement by solid wastes is an effective method to utilize secondary resources and reduce CO2 emissions. In this study, copper slag (CS) and granulated blast furnace slag (GBFS) were used to replace cement to address the low activity of CS, which limits its large-scale utilization. The dissolution characteristics, compressive strength, hydration products, and microstructure of the composite cementitious materials containing CS and GBFS were investigated. The results showed that adding GBFS into the CS-cement composites increased the compressive strength, and the 3-day and 28-day strengths could be increased by 112% and 90%, respectively. The CS acted as a diluting and heterogeneous nucleating agent, promoting the hydration of the GBFS and cement to produce more C−S−H gels. In addition, the number of pores decreased and the microstructure densification increased. This study provides a solution for the comprehensive utilization of CS, which contributes to the high-value green utilization of solid wastes.
Highlights Adding GBFS into the cementitious material with CS increases the compressive strength The joint replacement of cement by CS and GBFS increases the hydrate content The synergistic effects of CS and GBFS are the filling effect and pozzolanic reaction
Preparation and hydration process of copper slag-granulated blast furnace slag-cement composites
https://orcid.org/0009-0007-5985-5969
https://orcid.org/0009-0002-2147-5956
Abstract Replacement of cement by solid wastes is an effective method to utilize secondary resources and reduce CO2 emissions. In this study, copper slag (CS) and granulated blast furnace slag (GBFS) were used to replace cement to address the low activity of CS, which limits its large-scale utilization. The dissolution characteristics, compressive strength, hydration products, and microstructure of the composite cementitious materials containing CS and GBFS were investigated. The results showed that adding GBFS into the CS-cement composites increased the compressive strength, and the 3-day and 28-day strengths could be increased by 112% and 90%, respectively. The CS acted as a diluting and heterogeneous nucleating agent, promoting the hydration of the GBFS and cement to produce more C−S−H gels. In addition, the number of pores decreased and the microstructure densification increased. This study provides a solution for the comprehensive utilization of CS, which contributes to the high-value green utilization of solid wastes.
Highlights Adding GBFS into the cementitious material with CS increases the compressive strength The joint replacement of cement by CS and GBFS increases the hydrate content The synergistic effects of CS and GBFS are the filling effect and pozzolanic reaction
Preparation and hydration process of copper slag-granulated blast furnace slag-cement composites
https://orcid.org/0009-0007-5985-5969
https://orcid.org/0009-0002-2147-5956
Abstract Replacement of cement by solid wastes is an effective method to utilize secondary resources and reduce CO2 emissions. In this study, copper slag (CS) and granulated blast furnace slag (GBFS) were used to replace cement to address the low activity of CS, which limits its large-scale utilization. The dissolution characteristics, compressive strength, hydration products, and microstructure of the composite cementitious materials containing CS and GBFS were investigated. The results showed that adding GBFS into the CS-cement composites increased the compressive strength, and the 3-day and 28-day strengths could be increased by 112% and 90%, respectively. The CS acted as a diluting and heterogeneous nucleating agent, promoting the hydration of the GBFS and cement to produce more C−S−H gels. In addition, the number of pores decreased and the microstructure densification increased. This study provides a solution for the comprehensive utilization of CS, which contributes to the high-value green utilization of solid wastes.
Highlights Adding GBFS into the cementitious material with CS increases the compressive strength The joint replacement of cement by CS and GBFS increases the hydrate content The synergistic effects of CS and GBFS are the filling effect and pozzolanic reaction
Preparation and hydration process of copper slag-granulated blast furnace slag-cement composites
Zhang, Qian (author) / Liu, Bo (author) / Sun, Zhe (author) / Li, Qiong (author) / Wang, Shuying (author) / Lu, Xuhang (author) / Liu, Jiling (author) / Zhang, Shengen (author)
2024-03-04
Article (Journal)
Electronic Resource
English
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