Study on Chloride Ion Permeability of Reclaimed Concrete with Different Dosage of Fly Ash
In order to explore the relationship between chloride ion permeability and fly ash content of recycled concrete,this paper carried out an experimental study on chloride ion permeability of recycled concrete under different fly ash content.The results show that the addition of fly ash is beneficial to strengthen the chloride penetration resistance of recycled concrete specimens.The addition of fly ash will directly affect the 6h conductivity of recycled concrete,and the 6h conductivity decreases with the increase of fly ash content.The decrease rate is faster when the content is low,and slows down when the content is above 20%.It is recommended to add 20%fly ash to prepare recycled concrete.The natu-ral diffusion test method of chloride ions is more accurate when it is used to quantitatively evaluate the chloride ion permeability of recycled con-crete.
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