Resistance of Concrete with Calcium Stearate Due to Chloride Attack Tested by Accelerated Corrosion

Water tightness of concrete is usually specified by how much water penetrates or infiltrates into concrete. This indication is applied to detect the possibility of corrosion attack due to aggressive ions such as chloride into reinforced concrete. Since the corrosion occurs on the steel bar of concrete, corrosion level is another methods to express impermeability of concrete. Unfortunately, corrosion process due to chloride attack in the real environment needs several decades. One of the methods which is used to measure corrosion process rapidly is an accelerated corrosion test. This study investigates water tightness and corrosion resistance due to chloride ion in the concrete with calcium stearate by using absorption and electrolytic corrosion test. Two types of concrete mixture i.e. CS-0 and CS-1 are considered in the experiment. Each type of concrete mixture comprises three groups of testing, which are compressive strength, absorption, and electrolytic corrosion test. The dimension of the specimen for compressive strength is 100 mm of diameter and 200 mm in height, and for absorption is 75 mm of diameter and 150 mm in height. Meanwhile, dimension of the electrolytic corrosion specimen is a cube with a size of 100 cm x 100 cm x 200 mm. The result shows that concrete with calcium stearate 1 kg per cubic meter of concrete has a better water tightness property than concrete without calcium stearate. Furthermore, the tendency is also being supported by corrosion resistance result. It can be observed that concrete with calcium stearate is also more resistant to corrosion attack.