Improving long-term corrosion resistance of highperformance concrete through the incorporation of micro silica and chemical admixtures
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This study investigates the long-term corrosion resistance and mechanical strength of high-performance concrete (HPC) usingmicro silica and chemical admixtures, including Rheobuild 1100, Glenium Ace 30, Sika Viscocrete 20 HEC, Ecmas HP-901and Varaplast PC 100. The grade of the concrete adopted was M60 which comprises OPC 53 grade, fly ash, micro silicaand fine aggregate and coarse aggregates were used. This study seeks to enhance the workability, strength in mechanics, andlongevity of mixtures of concrete characterized by a low water-cement ratio. The results revealed significant improvements incompressive, tensile, flexural and bond strengths compared to control mixes. Durability tests revealed superior resistance tochloride ion penetration, salt ponding, sorptivity, water permeability, and accelerated corrosion for HPC mixes with microsilicaand chemical admixtures. Microstructural inspection using SEM and EDX revealed the densified matrix and increasedC-S-H gel formation, which contributed to enhanced durability. Among all the admixtures, Glenium Ace 30 demonstratedsuperior performance, rendering it an exemplary selection for durable infrastructure.
Abstract
This study investigates the long-term corrosion resistance and mechanical strength of high-performance concrete (HPC) usingmicro silica and chemical admixtures, including Rheobuild 1100, Glenium Ace 30, Sika Viscocrete 20 HEC, Ecmas HP-901and Varaplast PC 100. The grade of the concrete adopted was M60 which comprises OPC 53 grade, fly ash, micro silicaand fine aggregate and coarse aggregates were used. This study seeks to enhance the workability, strength in mechanics, andlongevity of mixtures of concrete characterized by a low water-cement ratio. The results revealed significant improvements incompressive, tensile, flexural and bond strengths compared to control mixes. Durability tests revealed superior resistance tochloride ion penetration, salt ponding, sorptivity, water permeability, and accelerated corrosion for HPC mixes with microsilicaand chemical admixtures. Microstructural inspection using SEM and EDX revealed the densified matrix and increasedC-S-H gel formation, which contributed to enhanced durability. Among all the admixtures, Glenium Ace 30 demonstratedsuperior performance, rendering it an exemplary selection for durable infrastructure.