Durability Investigation of Fiber-Reinforced Functionally Graded Concretes in Cold Regions

Introducing the differential design concept of functional gradient into mass concrete structures is a feasible that can meet requirement crack resistance and internal hydration heat reduction for in cold regions. This study analyzed functionally graded concrete’s long-term performance durability behavior through experimental tests. Based on various mix proportion designs, six groups were selected to test. The shrinkage tests conducted according specifications, early also carried out. In addition, development characteristics with different proportions compared analyzed, impermeability, frost resistance, carbonation conducted. test results show be effectively improved by adopting design. adds an anti-freezing polycarboxylate superplasticizer, steel fiber, polypropylene fiber. Therefore, it better actual needs drying autogenous rates mixed composite water reducer significantly reduced. As result, this method microporous structure, reduced loss dynamic elastic modulus, strength grades. Furthermore, adding steel-like fiber monofilament outside structure improve inhibit occurrence dry cracks. areas.