Assessment of Crack Development Age Due to Corrosion on Reinforced High Strength Self Compacting Concrete with Inclusion of Potential Ternary Blended Cementitious Materials

Document Type : Original Article

Authors

1 Professor, Department of Civil Engineering VNR Vignana Jyothi Institute of Engineering &Technology, Hyderabad, Telangana, India

2 PG Student, Department of Civil Engineering, VNR Vignana Jyothi Institute of Engineering & Technology, Hyderabad, Telangana, India

10.22115/cepm.2023.399054.1238

Abstract

Corrosion-induced deterioration of reinforced concrete structures is still a major concern in civil engineering, as it can lead to structural instability and low durability. The purpose of this study is to determine the age of crack development caused by corrosion in reinforced high-strength self-compacting concrete (HSSCC) by using ternary blended cementitious materials. The study aims to showcase the durability and performance of HSSCC induced due to corrosion by including supplemental cementitious materials (SCMs) in varied amounts, such as fly ash, nano silica, and ground granulated blast furnace slag. In present study cement is partially replaced by fixed amount of Fly ash, ground granulated blast furnace slag (GGBS) in all the mixes at 20%, and 30% respectively and 1.5, 3, 4.5, 6, 7.5, 9 percent of Nano Silica (NS). Further this compares results of hardened and durability studies on SCC (cement+fly ash+GGBS) without NS and SCC (cement+fly ash+GGBS+NS) with NS. In the durability studies Accelerated resistance to corrosion test (ACPT) conducted for which reinforcing rods of 225 mm length and 10mm Ø are taken and placed concentrically in 100mm Ø and 200 mm height cylinders and then giving constant voltage to cell. Every 24 hours, the specimens are inspected and data from the data logger is logged until a crack appeared owing to the corrosion process. The results reveal significant improvements in the durability properties of HSSCC when ternary blended cementitious materials are added. The corrosion resistance and crack development age of the specimens are substantially enhanced compared to traditional mixes.

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