PROPERTIES OF CONCRETE INCORPORATED WITH SELF-HEALING AND INTERNAL CURING AGENTS

Abstract

In this study, effects of collective addition of self-healing and internal curing agents on the strength and permeation properties of concrete were determined. The internal curing agent Polyethylene Glycol (PEG 400) was added at 2% of cement based on weight and a mixture of Bentonite, Quick lime and Magnesium oxide were replaced for cement at 5% each as self-healing agent. Six mixes were investigated which includes a control mix (water curing), a mix with PEG 400 (with and without water curing), a mix with self-healing agents (water curing) and a mix integrated PEG 400 and self-healing agents. (With and without water curing) The density of concrete and strength parameters like compressive, flexural and tensile strengths were found by conducting experiments using the procedures given in testing standards. Permeation features were also studied by subjecting the concrete to water absorption and sorptivity tests. Density values lowered because of internal curing agents. The integration of internal curing and self-healing agents have adverse effects on density, strengths, water absorption and sorptivity co-efficients but there is an improvement in the mentioned properties when the specimens were cured in water.