DESIGN OF TEST OBJECTS AND MAKING MIGRATION CELL TOOLS FOR TESTING THE CHLORIDE PENETRATION IN CRACKED CONCRETE USING STEADY-STATE MIGRATION METHOD

• Main Author: Nur M, Fadhilah
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/43261
• Institution: Institut Teknologi Bandung

The marine environment which is rich in chloride can be bad for concrete, especially reinforced concrete because chloride ions can cause corrosion which can shorten the life of the structure. The impact of chloride ions will be more dangerous if the concrete is cracked, because the reinforcement in the concrete will be more exposed to sea water. In this final project, an experiment was carried out to determine the effect of concrete cracks on the penetration of chloride ions on concrete with different compressive strengths with the steady-state migration method. In addition, this research will also see whether there is an effect of the compressive strength of concrete and the addition of additives on the penetration of chloride ions. In this final project an experiment is made in the form of concrete test samples with a diameter of 10 cm and a length of 20 cm with quality K-250, K-400, and K-400 + fly ash. Then cut the test sample into a concrete plate with a thickness of 5 cm, then carried out cracking on the test sample, with a crack width range from 0.2 mm to 0.8 mm. The average test is carried out for four days using a voltage of 10V and a temperature below 40 oC. Data is taken every 12 hours for small crack concrete, except for the first and second data for large crack concrete taken every 6 hours. The test begins with no cracked concrete until the concrete with the biggest crack. After the data is obtained then the ratio of chloride ion concentration to time is compared for each type of concrete and each crack width. The hypothesis of this research is that the greater the width of the crack, the greater the effect of chloride ion penetration, which means the greater the concentration of chloride ions.