Concrete that can Bend

A team of researchers at the University of Michigan, Ann Arbor, under engineering professor Victor Li, have come up with a concrete that is actually flexible.
Belonging to the class of materials called Engineered Cement Composites (ECC), the new material looks like regular concrete, but is 500 times more resistant to cracking and 40 percent lighter in weight. ECC is a strain-hardening material while the normal fibre reinforced concrete (FRC) exhibits tension-softening behaviour. Under excessive strain, the ECC gives, because the specially coated network of fibres veining the cement is allowed to slide within the cement, thus avoiding the inflexibility that causes brittleness and breakage.