Research on the performance optimization of externally blended magnesium oxide CO2 foam cement
FENG Tugen
LI Zixu
ZHENG Bin
ZHANG Hongwei
WANG Haibo
ZHANG Jian
Abstract：This study addresses the high costs and operational complexities associated with carbon dioxide curing technology in the construction industry by proposing an innovative method.This method employs carbon dioxide as a gas source to perform both internal and external carbonation,thereby achieving effective carbon dioxide fixation.Through orthogonal experiments and range anal-ysis,the optimal foaming agent formula was determined:T and H were selected as the foaming agent and stabilizer,with concentra-tions of 4 g/L and 5 g/L,respectively.Comprehensive experiments identified the optimal water-cement ratio(1:2)and foam-to-slurry ratio(2:1),resulting in a material compressive strength of 5.30 MPa and a density of 1.209 g/cm3.Additionally,the inclusion of 15％magnesium oxide significantly enhanced the early strength of the carbon dioxide foamed cement,shortened the setting time to 8.7 h,and reduced the bleeding rate to 2.50％.These improvements significantly optimize the material properties,offering new perspectives and solutions for the application of carbon dioxide curing technology in building materials.
Keywords：carbon dioxide foamorthogonal experimentfoaming proportionmagnesium oxidefoam cementmechanical properties
Publication Date：2025-04-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 90-95 )