In order to analyze the performance of carbonization modification of recycled aggregate and the problem of carbon fixation.The anti-carbonation performance of recycled concrete was studied by using orthogonal test method,including fly ash content,recycled aggregate replacement ratio and water-binder ratio,the reasonable utilization of the replacement ratio of recycled aggregate is analyzed to improve the carbonation resistance of recycled concrete.The results show that the carbonation depth of recycled concrete increases with the increase of the replacement ratio of recycled aggregate,the water-binder ratio and the content of fly ash,and the water-binder ratio has the greatest influence on the carbonation depth When the ratio of water to binder is0.5,thecontent of fly ash is10%,and the replacement ratio of recycled aggregate is25%,the anti-carbonation ability of recycled concrete is the best.In order to improve the carbon fixation efficiency of recycled aggregate,we should choose reasonable spreading ways to ensure the carbon fixation effect.
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