CD Skripsi
Karakteristik Mortar Self-Healing Menggunakan Kapsul Natrium Silikat Dalam Air Dengan Metode Perawatan Statis
During its service life, mortar can form cracks and there is currently construction technology to repair these cracks by using self-healing material. Capsule-based self-healing with the healing agent sodium silicate can react with portlandite (Ca(OH)2) to form Calcium Silicate Hydrate (CSH) which fills the cracks. The purpose of this study was to assess the self-healing performance of mortar using sodium silicate capsules in water with static curing method. This study used capsules containing sodium silicate as self-healing agent at 0.25%, 0.50%, and 0.75% by weight of cement with mortar without sodium silicate capsules used as control. Thetestsincluded flow value, setting time, compressive strength, sorptivity, porosity, weight change and visual observation of self-healing mortar. All specimens were immersed for 28 days in water, then pre-cracked using a mortar compressive strength tool until cracks 0.1-0.3 mm wide appeared. After that, static curing in water was applied, then testing was carried at 0, 7, 28, and 91 days of immersion. The test results showed that flow value increased, setting time slower, compressive strength increased, sorptivity decreased, porosity decreased, weight change increased and self-healing efficiency increased as the percentage of sodium silicate capsules increased, which maximum at percentage of 0.75%. The self-healing efficiency of mortar using sodium silicate capsules is higher than mortar without sodium silicate capsules as seen from improvement in test results after crack and static curing in water. Based on this, mortar using 0.75% sodium silicate capsules with static curing in water can improve the self-healing performance of mortar.
Keywords: self-healing mortar, crack, self-healing efficiency, capsule, sodium silicate
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