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With the continuous development of China 's economy , the infrastructure is among the large-scale construction . As the most widely used building materials , concrete has a high compressive strength , easy sacrificed all the advantages of the mold and good materials can not be replaced , but the traditional cement -based materials with toughness poor performance , low tensile strength , easy cracking and other shortcomings. These features greatly limits the durability of concrete , and affect its application in certain special structural aspects . With the development of a variety of fiber reinforced concrete , based on the microscopic theory of physics , engineering design optimization using cement-based composites ( Engineered Cementitious Composites , hereinafter referred to as ECC ) can significantly improve the toughness of concrete , to show the strain hardening characteristics , improve durability of concrete . ECC material of sand particle size requirements more stringent , high production costs , are not suitable for large-scale investment in engineering practice , can only be used in some of the key parts of the structure or Buxiu reinforcement works . In order to reduce the production costs of the ECC , by improving the blending ratio of the ECC , there is obtained another fiber reinforced strain hardening cement-based composites (strain - the Hardening Cementitious Composites , hereinafter referred SHCC ) . SHCC 's cost is relatively low maximum uniaxial tensile strain to meet the computing requirements , cement-based material exhibits strain hardening characteristics and micro cracks cracking characteristics , although not as good as ECC toughness performance , but enough to meet the durability of cement-based material requirements and the actual project needs. Wedge splitting this topic SHCC specimens of different mix ratio , three-point bending , four-point bending , and a variety of straight pull test , during the test , the specimen damage morphology , fracture energy research to explore the SHCC strain hardening mechanism and strain hardening parameter describing the material strain hardening properties . Of applications Conhard software three-point bending , four point bending experimental results obtained by treating the the SHCC strain hardening parameters .
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