Composite, cement, engineering, or the same (ECC), to which concrete flexible can also say Composite is the base of cement and is readily with the template, it can be any shape desired. And by the fibers of the random special, usually fibers, polymer, etc., armed. Unlike regular concrete ECC (Composite, cement, engineering) have the capacity 3 to 7 percent. In comparison with ordinary portland cement that 0٫1%. So ECC is more like an iron, ductile behavior makes up a glass, crisp and brittle (like the OPC), that creates many applications for it.