Lightweight high-strength carbon sequestration concrete and preparation method thereof

The invention provides a preparation method of light high-strength carbon sequestration concrete, which comprises the following steps: firstly, compounding building micro powder with water to obtain carbon sequestration slurry, putting citric acid and the carbon sequestration slurry into a wet mill, and stirring at a low speed to obtain slurry A; secondly, adding sodium bicarbonate into the slurry A, and continuously stirring at a low speed to obtain slurry B; thirdly, stirring the slurry B at a high speed for a period of time under the condition of continuously introducing carbon dioxide, and continuously stirring at a low speed to obtain a carbon-sequestration light active material; and finally, stirring and mixing the carbon-sequestration lightweight active material, ordinary Portland cement, silica fume, mineral powder, sand, stone, an additive and water to obtain a mixture, pouring and curing to a specified age to obtain the lightweight high-strength carbon-sequestration concrete. The light high-strength