Saudi Journal of Civil Engineering (SJCE)
Volume-5 | Issue-06 | 147-164
Original Research Article
Corrosion Inhibitive Materials Influence on Load Bearing Capacity of Reinforced Concrete Beam
Charles Kennedy, Overo Kenneth Ejukonemu, Sornaate Lucky Easy
Published : July 30, 2021
Abstract
This research studied the negative effects of corrosion attack on steel reinforcement in a marine environment with a high concentration of salt (sodium chloride) by the use of exudate/resins that was applied directly to the steel reinforcement through coatings of different thicknesses and embedded in concrete beams, and checked for suitability as a corrosion protection agent. The maximum value obtained of flexural load tests for controlled is 26.65% as compared to the value of -18.23% and 26.4% for the corroded and coated samples were examined for comparison of the flexural strength test. The results showed lower deformation loads in controlled and coated specimens with reduced values over corroded specimens with higher deformation in comparison with reference ranges (controlled). The calculated mean differential and percentile values were checked (0.03kN and 0.23%), corrosion values (0.030kN and 0.21%) and coating values (0.02kN and 0.21%). The results showed that the effect of corrosion on the mechanical properties of reinforcing steel with a decrease in diameter reduced the average and percentage of samples corroded, while the controlled and coated samples showed a preserved state due to coating due to an increase in diameter different layer thickness with exudates/resin The cross-sectional area of reinforcing steel shows a different mean value and percentile value of the corroded value (0.01 mm and 0.02%) and the coated value (0.05 mm and 2.69%). Differentially, the calculated mean and percentage values of yield strength and tensile strength are (2.13 MPa and 0.97%) and (3.435 MPa and 0.08%) and were examined, the corroded values were (3.44 MPa and 0.86%) and (4.548 MPa and 0.08%), the values of coated are (2.13MPa and 0.97%) and (4.736MPa and 0.09%). From the data obtained and compared, the yield strength and tensile strength values of the corroded samples showed a decrease in the average and percentage values for load failure with lower load applications. Comparison ratios obtained for deformation the maximum values calculated for the mean and percentile values for the controlled were -0.6% against the corroded and closed values of 1.22% and -0.29%. The difference between the mean and percentage values obtained for the control was (0.02 and 0.91%), corroded values (0.02 and 0.93%), and coated values (0.02 and 0.91%). The maximum comparison value for the controlled sample was -31.32% compared to the corroded and coated samples of 63.75% and 31.6%, respectively. The mean differential and percentile values obtained for the controlled samples were (1.69% and 7.34%), corrosion values (1.2% and 17.55%) and coated values were 1.69% and 7.33%). In comparison, the corroded samples showed higher stress values and higher elongation rates, whereas the damaged state of coated samples was lower load and reduced elongation.