Serpentine carbon sequestration foamed lightweight soil and preparation method thereof

A serpentine carbon sequestration foamed lightweight soil, wherein ingredients of raw materials per cubic meter comprise:

• 10 to 100 parts by weight of magnesium oxide, 10 to 100 parts by weight of a filler, 10 to 100 parts by weight of serpentine, 2 to 45 parts by weight of CO2 bubbles and 20 to 400 parts by weight of water,
• wherein a weight of the serpentine is 30% of a sum of a weight of the magnesium oxide and a weight of the filler,
• wherein a preparation method of the serpentine carbon sequestration foamed lightweight soil comprises following steps:
• S1, preparing the raw materials:
• weighing 10 to 100 parts by weight of the magnesium oxide, 10 to 100 parts by weight of the filler, 10 to 100 parts by weight of the serpentine, and 20 to 400 parts by weight of the water for use later;
• S2, preparing a slurry:
• placing the serpentine, the magnesium oxide, and the filler into a mixing device in proportion, and stirring at a speed of 100 r/min for 1 minute to 2 minutes to mix the serpentine, the magnesium oxide, and the filler uniformly to obtain a mixture, adding the water respectively to the mixture 2 times or 3 times, stirring for 1 minute to 2 minutes after each addition of the water, and keeping the mixture from sinking to the bottom or agglomerating to ensure that the slurry is uniform and has no sedimentation until all of the water is completely added, and obtaining the slurry;
• S3, preparing the CO2 bubbles:
• adopting a pre-foaming method to use high-pressure CO2 to produce the CO2 bubbles, wherein the adopted CO2 is industrial high-purity carbon dioxide or carbon dioxide purified from industrial waste gas;
• S4, mixing and stirring:
• adding 2 parts by weight to 45 parts by weight of the CO2 bubbles into the slurry obtained from the step S2 for stirring, and ensuring that the CO2 bubbles are evenly distributed and the slurry has no sedimentation, then a good mixture is obtained, wherein a stirring speed is 600 r/min to 900 r/min, a stirring time is 10 minutes to 12 minutes;
• and
• S5, preparing and curing a sample:
• pouring the blended mixture into a mold for sealing, and curing the mixture in a curing room at a constant temperature to obtain the carbon sequestration foamed lightweight soil.