Carbonization-based lightweight CO₂ foamed cement-based material, and optimized preparation method and use thereof

(22) 11.04.2022

(45) 08.11.2022

(57) The present invention discloses an optimized preparation method of a carbonization-based lightweight CO, foamed cement-based material, and belongs to the field of geotechnical engineering materials. The preparation method includes: step Si: pre-screening existing common cement-based foaming agents and foam stabilizers; step S2: preparing a water-based carbon dioxide foam; step S3: preparing a cement slurry, and mixing the water-based carbon dioxide foam with the cement slurry to prepare a lightweight CO, foamed cement-based material; step S4: selecting foaming agents of different types and different concentrations and foam stabilizers of different types and different concentrations to prepare slurries, subjecting the slurries to slurry performance tests, and selecting the optimal ones; step S5: optimizing initial water-to-cement ratio and foam-to-slurry ratio parameters; and step S6: optimizing a gas-filling volume parameter (water pump speed).

(71) Hohai University, Jiangsu (CN)

(73) Hohai University, Jiangsu (CN)