For self-healing concrete, just add bacteria and food - tech - 01 September 2010 - New Scientist

For self-healing concrete, just add bacteria and food - tech - 01 September 2010 - New Scientist: "Like living bone, concrete could soon be healing its own hairline fractures – with bacteria in the role of osteoblast cells. Worked into the concrete from the beginning, these water-activated bacteria would munch food provided in the mix to patch up cracks and small holes."