Corrosion potential of coated steel bar embedded in sea-water mixed mortar

Abstract

Corrosion of embedded steel bars in concrete structures is the most impactful deterioration case in the world therefore many researchers and engineers are looking for the unknown mechanism related to the occurrence process, the effect of the damaged structures to its capacity and serviceability, and the intervention methods to control the rate of corrosion nowadays. One of the most prevalent liquid materials used in concrete is freshwater. However, the lack of freshwater for basic requirements in certain regions necessitates the adoption of an alternate material. Seawater, abundant in Indonesia, has the ability to substitute freshwater in concrete mixtures. However, its high concentration of chloride ions might raise the risk of corrosion in reinforced concrete structures. The laboratory experiment was proposed to find the empirical test result of the performance of corrosion prevention to the seawater mix RC structures. Three type of cements (PPC, PCC, and PPC-PCC mixture) were used as binder and two type of protection (steel coating and no coating) were applied in this research. One day after specimen casting, it were demolded and cured under water condition until 28 days. After that, the cylindrical and beams specimens were tested and the cubical specimens were exposed to three conditions (air-dry, wet, and dry-wet cycle) until a half-year and the half-cell potential test was conducted periodically every week. Based on the results, it demonstrated that the steel coating is the most suitable corrosion prevention method and PCC is recommended to maintain the corrosion potential stable to be passive.

Engineering properties of seawater-mixed mortar with batching plant residual waste as aggregate replacement

“…Concrete is a popular construction material due to its resilience, adaptability, and low cost [1,2,3,4,5,6]. Due to the increased demand for concrete in the construction industry, researchers and engineers compete to develop various types of concrete, such as those with high performance, high compressive strength, high environmental resistance, and seismic shock resistance, among others [7,8,9].…”

Utilization of Mortar Waste as Environmentally Friendly Construction Material Replacement to Support Sustainable Development Goals

“…Due to the growing demand for concrete for buildings, entrepreneurs strive to make various types of concrete, such as concrete with high performance, compressive strength, environmental resistance, and seismic shock resistance [1], [4], [6]- [10]. Sustainable construction designs have become popular, and the utilization of waste material is well-developed nowadays [11]- [13].…”