Experimental Research On Waste Fiber And Recycled Concrete Erosion Resistance Performance

With the increasing pressure on the Earth’s environment and resources, Recycling of waste as environmental, resource and construction of circular social problems, more and more attention around the world. Building process produces the vast majority of waste directly discharged into the natural world as an solid waste, causing serious environmental pollution.Currently a large number of buildings already have the service life, premature or out of service period, reconstruction or maintenance and waste disposal are significant economic burden on the country, although people have scrap concrete using recycled concrete after smashing through a deal with form application of recycled concrete in practical engineering, But this efficient of uses abandoned concrete of way due to regeneration concrete of aggregate itself of defects effect has building of using life, therefore both at home and abroad research personnel from multiple area through has large of test research in guarantee regeneration concrete strength of while improve its durability, as regeneration concrete of frozen thaw, penetration, carbide and erosion,, concluded that uses polypropylene fiber on concrete for strengthened, can clear improved its mechanical performance, and improve its strength;And many have already been applied to actual projects, For effective use of available resources, on the basis of this article in the previous research results, made some advance, study on recycled concrete with waste fiber to join, main component of waste fiber is polypropylene fiber, research of waste fiber recycled concrete durability, mainly from the corrosion resistance and impermeability to study the effects of waste fiber for durability.The main content of this article is as follows:1. experimental design in four different waste fiber volume fraction and combination of three different lengths, through a combination of waste fiber concrete mechanics performance test of recycled concrete, initially determine the impact of mixing waste on the mechanical properties of concrete.2. test focused on the study of waste fibre durability of recycled aggregate concrete, through a combination of on the amount and length of fibers in different comparison of anti-seepage, erosion-resistant performance test analysis to study waste fibers with different content and different length combinations affect the durability of recycled concrete, and to determine the optimal mix of improving the durability of concrete.System research has fiber volume score respectively for0, and0.08%, and0.12%, and0.16%, and fiber length respectively for12mm, and19mm, and30mm and3kind of regeneration concrete cover respectively for0.45, and0.5, and0.55, and erosion solution NaCl solution, and NaSO4solution and water, and erosion solution concentration of concentration respectively for2%, and4%, and8%, and and erosion time of changes respectively for14d, and28d, and60d, and Scrap fiber recycled concrete in90d outside performance, mechanical properties under erosion environment, and focus on the resistance to erosion, seepage of waste fiber recycled concrete performance. Work and completed the following conclusions: Experimental study on erosion resistance of waste fiber recycled concrete:after you mix with waste fiber, Cl-、SO42-erosion resistance of recycled aggregate concrete with different degrees of increase;Solution greater concentration of erosion, waste fiber recycled concrete corrosion resistance the more low.As the erosion of time increased in90days, scrap fibers of unconfined compressive strength of recycled aggregate concrete to increase soon, but to stabilize at90days.Waste fiber regeneration experimental research on impermeability of concrete:after you mix with waste fiber, recycled concrete, apparent soluble chloride ion diffusion coefficient decreased;With the increased volume of waste fiber, apparent diffusion coefficient of chloride ion content, gradually decreases.Penetration depth of recycled concrete with waste fiber samples increases, soluble chloride content gradually decreases.