Blog

Bacillus pasteuri

Bacillus pasteurii is a soil bacterium. It is a protein based bacterium which secretes urease. Bacteria multiplies in the concrete mixture and forms cementacious material called cacite (binder material like cement). Life span of the bacteria is about 200 years and can survive at a temperature of 120ºC. It has high tolerance level for both temperature and pressure. This process is called MICP (Microbiological Induced Calcite Precipitation).

It has a self-healing property when it is used as admixture. It repair cracks and provide strength to the concrete structure. It fills most of the pores by precipitation of calcite which makes the concrete less porous. By filling voids it increases strength upto 30%. It becomes corrosion resistance to reinforcement by making surface water proof. It also decreases initial and final setting time of cement. It decreases the permeability of concrete by pore filling. It also decreases the cement quantity and increases the durability of structure. For RCC, it prevent corrosion by surface decomposition of CaCO3 by Bacillus pasteurii

Previous
ZI3A8686.JPG

Ultra-high performance concrete

Ultra-high performance concrete (UHPC) acts as a novel material in the construction industry. The properties exhibited by these materials are the high compressive strength (Generally exceeding 150 Mpa), reluctant to environmental stress conditions and high mechanical strength.

The Initial cost of making UHPC restricts the replacement of normal grade concrete. The Initial cost and complex methodology involve in manufacturing limit its application to Bridges, the foundation of power plants, Airports, and Mega-structures. 

Our eager experimenters have achieved a mix that not only has a very high compressive strength (exceeding 180 Mpa) but also involves local building materials as major components which helps us to reduce cost significantly.

The objective of developing this ultra-high performing concrete is to develop radically new structures which are generally not possible with regular grade concretes.