Flexural Strength of ECC Beams

In terms of material constituents ECC employed similar constituents like fiber reinforced concrete (FRC). It includes water cement sand fiber and some popular chemical and mineral admixtures. Coarse aggregates were not used which tends to adversely affect the ductile properties of the composite. Unlike some high performance fiber reinforced concrete ECC does not contain high percentage of fiber. Generally 2% of discontinuous fiber by ECC volume fraction or lesser is suitable. Due to the relatively little amount of fibers and its chopped shape the mixing procedure of ECC is identical to those used in mixing process of normal concrete. Many types of fiber could be utilized in ECC but the detail composition must confirm the certain rules assumed with micromechanics requirements. This means that the matrix fiber and the interface between them (mechanical and geometric) properties must be in a proper combination in order to obtain a wonderful properties of ECCs. Finally ECC designs are followed by micromechanical principles.