Composition suitable for self-healing concrete, method for manufacture thereof, and use

Abstract

The invention pertains to a particulate composition suitable for self-healing concrete comprising limestone-forming bacteria or spores of limestone-forming bacteria and a bacterial nutrient dispersed in a lactic acid based oligomer matrix. The invention also pertains to a method for manufacturing the particulate composition, comprising the steps of mixing a lactic acid based oligomer in the liquid phase with limestone-forming bacteria or spores of limestone-forming bacteria and a bacterial nutrient, and solidifying the resulting mixture to form solid particles. The mixing step is preferably carried out in an extruder. The formation of solid particles can be carried out in an under water pelletiser.

Dependencies are inferred from the claim text.