| Engineered Cementitious Composite |
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Engineered Cementitious Composite, (ECC) is an easily molded and shaped Mortar based composite reinforced with short random fibers, usually Polymer fibers. ECC, unlike common fiber reinforced Concrete , is a Micromechanically designed material. This means that the mechanical interactions between fiber, matrix and its interface are taken into account by a micromechanical model which calculates these constituent properties to a composite response. As a result, guidelines for selection of fiber, matrix and interface characteristics advantageous for composite properties are made available. One of the most significant characteristics of ECC is its tensile strain hardening behavior with a strain capacity in the range of 3-7%. This means that unlike common concrete, which is brittle and breaks under that amount of strain, ECC will bend under the same stress, like a piece of Sheet Metal , although the fiber content is typically less than 2% by volume. The high ductility is achieved by optimizing the microstructure of the composite employing micromechanical models. ECC looks exactly like regular concrete, but under excessive strain, the ECC concrete bends because the distinctively coated matrix of fibers in the cement is allowed to slide within the cement. ECC is made mainly of the same ingredients of regular concrete minus the coarse Aggregate . The and Environmental Engineering and Materials Science and engineering, believes most of these problems have been addressed. ECC COMPARED TO FRC AND HPFRCC Note: FRC=Fiber-Reinforced Cement. HPFRCC=High-Performance Fiber Reinforced Cementitious Composites SEE ALSO EXTERNAL LINKS
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