This article studies the influence of different age groups on the tensile bonding performance,compres-sive strength performance,and SEM microstructure of wall painting floor panels after spraying NaCl solutions with a mass fraction of 4%,8%,and 12%with red clay content ratios of 0%,25%,50%,75%,and 100%,us-ing tensile bonding strength and compressive strength as measurement indicators.The experimental results show that as the proportion of red clay increases,the curing period increases,The tensile bond strength and compressive strength both show an upward trend,and with the increase of salt concentration,the tensile bond strength and compressive strength of the test block show a decreasing trend;At the age of 90 days,the tensile bonding strength of the red clay test block sprayed with 4%NaCl solution with a 100%dosage reaches 15.28×10-2MPa,with a compressive strength of 2.01MPa;The tensile bond strength reached14.03×10-2 MPa when sprayed with 8%NaCl solution,with a compressive strength of 1.92 MPa;The tensile bond strength reached12.15×10-2MPa when sprayed with 12%NaCl solution,with a compressive strength of 1.79MPa;The preliminary conclusion is that the amount of red clay added,the curing period,and the concentration of soluble salts in the environment are related to the durability and lifespan of the mural foundation.The occurrence and development of alkali disease are related to comprehensive factors such as the properties of the production ma-terials and changes in the preservation environment,providing theoretical basis and support for the implemen-tation of effective governance and prevention measures for the protection of mural cultural relics.
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