Green low-carbon regenerated coarse-grained roadbed filler and preparation method thereof

The invention discloses a green low-carbon regenerated coarse-grained roadbed filler and a preparation method thereof.The preparation method comprises the following steps that after air-dried muck and a muck modifier are mixed in proportion, crushing and sieving treatment are conducted, and powdery improved muck is obtained; putting the powdery improved muck into a disc granulator, and granulating while spraying water, so as to obtain a regenerated coarse-grain roadbed filler blank; collecting a blank body, and putting the blank body in a combustion tail gas environment containing CO2 gas to enable the blank body to fully react with the CO2 gas; and air-drying to obtain the green low-carbon regenerated coarse-grained roadbed filler. According to the method, waste muck is used as the raw material, the cost is low, muck stacking sites can be reduced, and the natural environment is protected; calcination is not needed in the preparation process, and direct environmental pollution is avoided ...