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Nowadays, utilizing large amount industrial by-product y ash (FA) as the alternatives for cement in self-compacting concrete (SCC) had attracted more attention. In this study, FA was employed in SCC at ve levels (0 %, 20 %, 30 %, 40 %, 50 %). The mechanical behaviors, the water porosity, the transport properties and the sustainability of FA series SCC were investigated. At the initial curing stage (3 days), the use of FA in SCC reduces mechanical properties, increases water porosity, water absorption and water absorption coe cient (sorptivity) of SCC. FA series SCC have the lower resistance against carbon dioxide attack, chloride ion penetration than cement -based SCC. The prolonging curing time is bene cial to improve the long-term behaviors of FA-blended SCC. After SCC made with 20 %, 30 %, 40 % FA water-curing for 90 days, there are an reduction of 0.44-2.09 % in the mechanical behaviors and an increase of 0.082-0.41 % in the water porosity, compared to pure-cement SCC. Beyond the content of FA (40 %), the differences of the mechanical properties and the water porosity between SCC with 50 % FA and fully cement SCC are below the value of 2.5 %. With the progress of the curing time, the largest reduction rates of the water absorption and the sorptivity were found in 50 % FA-blended SCC. Utilizing 50 % FA in SCC reduces the total charge passed values of SCC. The manufacture of 50 % FA-blended SCC has the lowest energy consumption and released amounts of CO 2 , NO x , SO x in all SCC mixtures. The application of high-level FA in SCC is the positive assistance to prepare sustainable SCC with satisfying long-term behaviors.