Study on the performance of polymer grouting repair materials for external insulation of exterior wall
MA Yan
LI Jianwei
ZHANG Maoliang
TIAN Chongfei
YIN Huiling
Abstract：In this paper,the effect of sulphate aluminium cement(SAC)on the workability,mechanical properties and volume stability of polymer grouting repair material for external wall insulation was studied by using control variable method.The results showed that with the increase of SAC content,the initial and 30 min fluidity of the repaired materials decreased,the loss of 30 min fluidity increased,the initial and final setting time decreased,and the interval between the initial and final setting time de-creased.The early 1-day compressive strength,flexural strength and tensile bond strength of the repaired materials increased with the increase of SAC content,and the later 28-day compressive strength decreased with the increase of SAC content,and the 28-day flexural strength and tensile bond strength first increased and then decreased with the increase of SAC content,when SAC content was 2%,reaching the maximum of 7.7 MPa and 1.51 MPa,respectively;The drying shrinkage value of grouting repair materi-al decreases with the increase of SAC content and increases with the extension of age.
Keywords：sulphate aluminium cement(SAC)repair materialsworkabilitymechanical propertiesvolume stability
Publication Date：2025-09-25
Online Publishing Date：2025-10-15(First online date of this platform, not the publication date of the document)
Pages：4( 95-98 )