Strength improvement of cement mortar by the addition of ureolytic microorganism

Abstract

The cementing properties of materials are responsible for the sustainability of any structure. The present study gives a layout of the improvement of durability of a structure by introducing an ureolytic bacteria. The bacteria which are capable of CaCO3 production in a common metabolic process are called ureolytic bacteria. The ureolytic bacteria has the special quality of healing the crack and can strengthen the structure to make it more durable. Different tests have been conducted such as consistency and initial setting time to discover the impact of the bacterial arrangement on cement. Compressive strength test and sorptivity test are utilized as a part of the present examination to recognize the variety in the mechanical properties of cement mortar. The UV-spectrophotometer is used to know the wavelength of the absorbance from that the Beer–Lamber’s law can be verified, i.e., concentration is directly proportional to wavelength. The bacteria which are introduced in the mortar by replacing the water with the bacterial solution can give low sorptivity and high compressive strength at a particular range which has been found during the investigation.