Cylinder of sand transformed into sandstone by Bacillus pasteurii bacteria .

American researchers used bacteria, Bacillus pasteurii, to consolidate grains of sand together. They injected them into sand with nutrients (urea) and oxygen. They then produce calcite which binds the grains together. The strength obtained with small amounts of calcite helps resist shear forces during earthquakes. This biocement makes it possible to reinforce foundations, while being able to be produced on site and at room temperature, thus limiting production costs. This technique is also used in the restoration of sandstone statues to seal cracks. Can be used as a pen holder….#17