Chloride ingress and macro-cell corrosion of steel in concrete made with recycled brick aggregate

• Published in: Frontiers of Structural and Civil Engineering Vol. 15; no. 6; pp. 1358 - 1371
• Main Authors: MOHAMMED, Tarek Uddin, RAHMAN, Mahfuzur, SABBIR, Ahmed, HASAN, Mohammad Mehedi, MAMUN, Abdullah Al
• Format: Journal Article
• Language: English
• Published: Beijing Higher Education Press 01.12.2021; Springer Nature B.V
• Subjects: brick aggregate; Chloride; chloride ingress; Chlorides; Cities; Civil Engineering; Corrosion; Corrosion cell; Corrosion currents; Corrosion potential; Countries; Engineering; Investigations; macro-cell corrosion; recycled brick aggregate; Recycled materials; Regions; Research Article; Seawater; Sodium chloride; Steel; brick aggregate; macro-cell corrosion; chloride ingress; recycled brick aggregate
• ISSN: 2095-2430; 2095-2449
• DOI: 10.1007/s11709-021-0769-x

An investigation on chloride ingress and macro-cell corrosion of steel bars in concrete made with recycled brick aggregate (RBA) was carried out. As control cases, virgin brick aggregate (BA) and stone aggregate (SA) were also investigated. Both cylindrical and cracked prism specimens were studied for 16 different cases. The prism specimens were made with a segmented steel bar providing electrical connection from outside of the specimens to measure macro-cell corrosion current continuously under seawater splash exposure for a period of 30 d using a data logger. Cylindrical specimens were submerged in 3% NaCl solution at a temperature of 40°C to investigate chloride ingress in concrete made with RBA, BA, and SA after 120 and 180 d. Half-cell potential, corrosion area, and depths of corrosion were also investigated. The chloride ingress as well as corrosion of steel bars in concrete made with the different types of aggregate is ordered as RBA > BA > SA.