The quantity and viability of the Geobacillus stearothermophilus were evaluated when it was enclosed in an alginate-hydrogel before being added to the mortar mixture. Scanning electron microscopy (SEM) was used to examine the bacteria and their characteristics when they were encapsulated. Geobacillus stearothermophilus (AE-GS) in mortar mix was evaluated for its efficacy as a self-healing agent using a compressive strength test, and healing efficiency was determined by bacteria precipitation. The SEM analysis revealed the shape of the bacteria and the alginate hydrogel's capacity to encase both bacteria and nutrients. By replacing 15% of the mortar with a higher AE-GS content, a maximum crack healing rate of 80% was attained. The mortar specimens with 15% AE-GS replacement had lower compressive strength results than those with 3% and 9% AE-GS replacement. Without the AE-GS, the mortar had a low self-healing capacity. The findings indicated that altering the available sources in its environment could aid in inducing self-healing.