Evaluation of the Corrosion Rate of Reinforced Concrete Grade K-225 Using Recycled Concrete and Superplasticizer Sika Viscocrete-3115N

This study focuses on analyzing the corrosion rate of reinforced concrete with a compressive strength of K-225, utilizing recycled concrete fragments as coarse aggregate and incorporating the admixture Superplasticizer Sika Viscocrete-3115N. The background of this research is to examine the impact of recycled materials on the corrosion resistance of reinforcement steel in concrete, and to assess the extent to which the superplasticizer admixture can enhance the resulting concrete properties. The research addresses the following questions: (1) What is the corrosion rate of reinforced concrete K-225 using recycled concrete aggregate without the addition of Sika Viscocrete-3115N? (2) How does the Sika Viscocrete-3115N admixture affect the corrosion rate of reinforced concrete with a K-225 grade? and (3) What are the corrosion rate values of reinforcement steel in K-225 concrete with the addition of 5%, 7%, and 9% admixture, respectively? This research applies an experimental method through direct testing of concrete samples designed with the specified compositions. The results show that using recycled aggregate without additives significantly increases the corrosion rate due to the high porosity of the concrete, allowing chloride ions (Cl?) to penetrate easily. On the other hand, the addition of Superplasticizer Sika Viscocrete-3115N effectively improves the concrete structure and reduces the corrosion rate of embedded reinforcement steel. The measured corrosion rate values for concrete with 5%, 7%, and 9% admixture are 1.352478; 1.309084; and 0.7117, respectively.