Investigation of the mechanical properties and the effect of corrosion of cast iron waste concrete through micro-cell testing

• Main Authors: Cu, Gabriel Romeo K., Legarda, Jed Ebenezer L., Zamora, Shirelyn Rhose C.
• Format: text
• Language: English
• Published: Animo Repository 2017
• Subjects: Concrete; Concrete > Corrosion
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/7082
• Institution: De La Salle University

There are tons of solid wastes left in landfills that are not utilized properly. As a solution, waste substitution to concrete has been significant in this generation. Cast iron has always been used as a material for the current industrialization. The focus of this research is to make use of the waste produced by the cast iron during manufacturing by substituting cast iron waste ranging for 10% to 30% on normal weight concrete. Strength tests are performed to determine the effectiveness of the substituted material. Most of the strength tests values increased and minimally decreased the workability as the substitution increased. The highest partial substitution, 30%, yielded the following compressive, split tensile, and flexural strength: 25.12, 3.29, and 4.47 MPa, respectively. The averaged unit weight for the 30% partial substitution is 2372.44 kg/m³. Since cast iron waste has metallurgic properties, the material is prone to corrosion which decreases the effectivity of steel concrete. Hence, the main objective of this study is to check the corrosion activity of the cast iron waste concrete by conducting micro-cell test experiments. The corrosion testing was conducted to both conventional and 30% cast iron waste concrete. Based on the obtained data, corrosion is expected to occur in 10 to 15 years time for both concrete specimens. The current density was obtained and yielded a result of expected corrosion in 10 to 15 years. The mix with partial aggregates had slightly higher chance of early corrosion activity. Overall, the partial substitution of cast iron wastes yielded favorable result in the strength tests, corrosion activity and unit weight of concrete.