26 June 2024 | Jacob O. Ikotun, Gbenga E. Aderinto, Makungu M. Madirisha and Valentine Y. Katte
This review explores the use of geopolymer cement (GPC) in pavement applications, emphasizing its sustainability and performance. GPC is an innovative, eco-friendly alternative to traditional Portland cement, offering significant environmental benefits. It reduces greenhouse gas emissions and energy consumption during production, while enhancing pavement performance through improved mechanical, durability, and thermal properties. However, challenges remain in its widespread adoption, including variability in raw materials, the need for suitable hardeners, lack of standardized codes, cost competitiveness, and limited field data. Despite these challenges, GPC is a sustainable material that aligns with Sustainable Development Goals (SDGs) 3, 9, 11, and 12.
The review provides a comprehensive overview of GPC, including its synthesis, key ratios, and properties. GPC is synthesized through the reaction of aluminosilicate materials with alkaline or acidic hardeners, forming a three-dimensional network structure. Key ratios such as SiO₂/Al₂O₃, M₂O/SiO₂, and H₂O/M₂O are crucial for optimizing GPC's mechanical and durability properties. GPC exhibits superior mechanical properties, including compressive, tensile, and flexural strength, as well as enhanced durability attributes like chemical resistance, fire resistance, freeze-thaw resistance, abrasion resistance, and fatigue resistance.
The environmental impact of GPC is also discussed, highlighting its potential to reduce greenhouse gas emissions and energy consumption compared to traditional cement. GPC's use in pavement applications offers significant sustainability benefits, including reduced environmental impact, improved durability, and the ability to recycle industrial byproducts. The review also addresses the challenges in GPC utilization, such as the need for standardized codes and procedures, cost competitiveness, and limited field data. Overall, GPC presents a promising alternative to traditional cement in pavement construction, offering a sustainable solution that aligns with global sustainability goals.This review explores the use of geopolymer cement (GPC) in pavement applications, emphasizing its sustainability and performance. GPC is an innovative, eco-friendly alternative to traditional Portland cement, offering significant environmental benefits. It reduces greenhouse gas emissions and energy consumption during production, while enhancing pavement performance through improved mechanical, durability, and thermal properties. However, challenges remain in its widespread adoption, including variability in raw materials, the need for suitable hardeners, lack of standardized codes, cost competitiveness, and limited field data. Despite these challenges, GPC is a sustainable material that aligns with Sustainable Development Goals (SDGs) 3, 9, 11, and 12.
The review provides a comprehensive overview of GPC, including its synthesis, key ratios, and properties. GPC is synthesized through the reaction of aluminosilicate materials with alkaline or acidic hardeners, forming a three-dimensional network structure. Key ratios such as SiO₂/Al₂O₃, M₂O/SiO₂, and H₂O/M₂O are crucial for optimizing GPC's mechanical and durability properties. GPC exhibits superior mechanical properties, including compressive, tensile, and flexural strength, as well as enhanced durability attributes like chemical resistance, fire resistance, freeze-thaw resistance, abrasion resistance, and fatigue resistance.
The environmental impact of GPC is also discussed, highlighting its potential to reduce greenhouse gas emissions and energy consumption compared to traditional cement. GPC's use in pavement applications offers significant sustainability benefits, including reduced environmental impact, improved durability, and the ability to recycle industrial byproducts. The review also addresses the challenges in GPC utilization, such as the need for standardized codes and procedures, cost competitiveness, and limited field data. Overall, GPC presents a promising alternative to traditional cement in pavement construction, offering a sustainable solution that aligns with global sustainability goals.