BACILLUS THURINGIENSIS KNUC2103 AND A CEMENT ADDITIVE FOR DURABILITY IMPROVEMENT AND CRACK REPARING OF CEMENT PASTE OR CONCRETE CONTAINING THE SAME

摘要

PURPOSE: Bacillus thuringiensis KNUC2103 (KCTC12149BP) is provided to seal cracks of a cement or concrete structure by forming calcium carbonate, thereby repairing the cracks. CONSTITUTION: A novel microorganism, Bacillus thuringiensis KNUC2103 (KCTC12149BP) has an antifungal activity and forms calcium carbonate. The strain contains 16S rDNA gene with a base sequence of sequence number 1. A cement additive for enhancing durability of cement paste or concrete and repairing cracks contains the strain.