Concrete cancer and precast concrete

'Concrete cancer' is a term that was coined to describe the surface deterioration in finished-concrete surfaces on a large number of buildings constructed in the 1950s to the 1970s.

In precast concrete construction, panels are normally constructed with a veneer concrete, designed to achieve an architectural finish, with a backing of conventional concrete. The concern surrounding the concrete-cancer phenomenon has led some architects and engineers to be suspicious of the laminating process and to demand panels constructed entirely of the decorative veneer-type concrete: a practice that is neither economical or, with today's technology, necessary.