本研究内容为红黏土掺量比0%、25%、50%、75%和100%的地仗试块在分别喷洒质量分数4%、8%、12%的NaCl溶液后,在不同龄期时壁画地仗试块拉伸粘结性能、抗压强度性能以及SEM微观形貌的变化影响,以拉伸粘结强度、抗压强度作为衡量指标.试验结果表明:随着红黏土比例的增加,养护龄期的增长,拉伸粘结强度和抗压强度均呈上升趋势,随着盐浓度的增大,试块的拉伸粘结强度和抗压强度呈减小趋势;龄期90d时,100%掺量的红黏土试块喷洒4%的NaCl溶液时的拉伸粘结强度达到15.28×10-2MPa,抗压强度达到2.01MPa;喷洒8%的NaCl溶液时的拉伸粘结强度达到14.03×10-2MPa,抗压强度达到1.92MPa;喷洒12%的NaCl溶液时的拉伸粘结强度达到12.15×10-2MPa,抗压强度达到1.79MPa.初步得出结论:红黏土掺量、养护龄期和环境中可溶性盐的浓度对壁画地仗的耐久性寿命有影响,酥碱病害的发生和发展与制作材料的性质、保存环境的变化等综合因素相关,为壁画文物保护提出有效治理和防治措施的实施提供理论依据和支撑.
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.