Infiltration of chloride ion in the self compacting concrete with calcium stearate

Abstract

Corrosion rates in reinforced concrete can be detected by the amount of chloride ions present in concrete. This study aims to determine the effect of calcium stearate use on self compacting concrete on the infiltration of chloride ions. The calcium stearate content used is 0, 1, 5 and 10 kg per 1 m3 of self-compacting concrete (SCC). The concrete quality tested includes 20, 30 and 40 MPa. The parameters tested in this study were compressive strength and infiltration of chloride ions. Compressive strength specimen is in the form of cylinder 15 mm in diameter and 150 mm in height, while chloride ion infiltration specimen is in the form of cubes with sides of 150 mm. The results show that calcium stearate concrete with 10 kg / m3 of concrete when compared to normal concrete, the compressive strength decreases by -6.69%, 16.16% and 18.74% for concrete 20, 30 and 40 MPa respectively. Whereas the infiltration of chloride ions in concrete on 10 mm depth from the concrete surface was 0.153, 0.061 and 0.012% in the concrete of 20, 30 and 40 MPa. These infiltration of chloride ion in concrete 20, 30 and 40 MPa are lower around 287, 252, and 626% compared to concrete without calcium stearate.

Properties and Durability of Cement Mortar Using Calcium Stearate and Natural Pozzolan for Concrete Surface Treatment

“…In this study, in order to overcome the shortcomings of the existing concrete surface treatment technology and to develop water resistance inside the concrete, a metal salt-based calcium stearate powder having resistance to moisture was used. Calcium stearate reduces the permeation of chloride due to water absorption so that the durability of the specimen can be improved [16][17][18]. Calcium stearate has the property of being insoluble in water, and when added at the time of concrete compounding, bleeding phenomenon due to material separation can be predicted, so diatomite and yellow clay were used to solve the problem.…”