Modification of Microbial Foam Agent and Their Application in Foam Concrete
XU Rui
YANG Chenfei
ZHANG Lei
WANG Tianlei
ZHANG Ying
Abstract：To address challenges related to the low foaming ratio,uneven foam size,and poor foam stability of microbial foam agents,cationic surfactant(cetyltrimethylammonium bromide,CTMAB),anionic surfactant(sodium dodecylsulfonate,CAS),and zwitterionic surfactant(coconut amidopropyl betaine,CAB)were used to modify the microbial foaming agent.The objective was to investigate the impact of surfactant type and dosage on the foaming ratio and foam properties of the microbial foam agent,as well as explore the influence of zwitterionic surfactant-modified microbial foam agent on the physical,mechanical properties,and micro pore structure of A06 foam concrete.The results show that the surfactant CAB exhibites the most significant enhancement in the performance of the foam agent compares to the other two surfactants,with the optimal dosage identifies as 5％.At this concentration,the foaming ratio of the microbial foam agent is 32.Moreover,the 1 h sedimentation of foam is 5 mm,and 1 h bleeding rate of the foam is 62.96％,respectively.The resulting foam exhibites small and uniform size.The compressive strength of the prepared A06 foam concrete reaches 3.45 MPa,surpassing industrial standard requirements.
Keywords：microbial foam agentsurfactantfoam stabilityfoam concrete
Publication Date：2025-01-27
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 42-49 )