Research Status and Development Prospects of Cement-based Composite Materials with Flax Fiber
In comparison to the traditional fibers,flax fiber has many features,i.e.high fracture strength,small tensile deformation,better bending and large torsion stiffness.Flax fiber cement-based materials are the civil engineer materials with the broad application prospects.The research statuses and the existing problems of cement-based materials with flax fiber were discussed from 3 aspects,i.e.the physical and chemical properties of flax fiber,the role of flax fiber on the behaviors of cement-based materials,the properties improvement of cement-based materials with flax fiber.Based on above investigation results,the following research directions were drawn:enhance the using of flax fiber to replace polypropylene fiber on cement-based materials;revel the long-term properties of cement-based materials with flax fiber at the wet conditions;build the damage model of flax fiber cement-based composite materials under the combined actions of three-axis stress and wet conditions;improve the application performance of cement-based composite materials with flax fiber through increasing itself strength of flax fiber and improving the interfacial adhesion between flax fiber and cement-based materials.