Study On The Organic Imitation Steel Fiber Lightweight Aggregate Concrete

With the rising of China's comprehensive national strength,the infrastructure were extensively developed,and the traditional concrete plays an important role,along with the actual project application and the deepening of the scientific research,the fiber reinforced lightweight aggregate concrete is gradually widely used,it overcomes the defects of traditional concrete since the big,poor toughness,better improve the durability of concrete.Fiber reinforced lightweight aggregate concrete is the lightweight aggregate instead of traditional aggregate mixed with concrete,and adding a certain amount of fiber.The Inner Mongolia autonomous region is rich in pumice,its reserves,the region's natural pumice as coarse aggregate in concrete,which will make good use of regional resources,promote the region economy development.So this thesis focuses on the organic imitation steel fiber natural fundamental mechanical performance,frost resistance of pumice lightweight aggregate concrete durability and pore structure characteristics.In terms of basic mechanics,studied the different organic imitation steel fiber content on the natural pumice lightweight aggregate concrete cube compressive strength,splitting tensile and flexural strength;Frost resistance,the freeze-thaw cycle test,explores the organic imitation steel fiber relative loss modulus of natural pumice lightweight aggregate concrete and the influence of the mass loss rate change trend;Pore structure,analyzed the characteristic parameters of bubble,and explores the bubble characteristic parameters of basic mechanical properties and the influence law of frost resistance durability.Find out the most suitable organic imitation of steel fiber in the best dosage of natural pumice lightweight aggregate concrete.The results showed that:in natural pumice lightweight aggregate concrete mixed with a certain amount of organic steel fiber,can improve the mechanical property and frost resistance of concrete performance.organic imitation steel fiber optimal dosage of 0.7%.