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汉阳陵地下博物馆是我国首个遗址保存在恒温恒湿环境的博物馆,但遗址表面仍然析出了硫酸钙(CaSO_4·2H_2O)。本研究通过对汉阳陵13号坑封闭展厅内环境温湿度、土壤蒸发量、遗址本体及地下水可溶盐的长期监测分析硫酸钙(CaSO_4·2H_2O)产生原因。结果表明,13号坑环境湿度长期保持100%,由于遗址表面温度高于露点温度,空气中水分子在土壤表面不能转化为液态水返回到土壤中,而随着土壤水分蒸发遗址表面土壤溶液浓度逐渐增大,溶液中离子相互发生反应在遗址表面析出白色的硫酸钙。
Hanyangling Underground Museum is the first site in China preserved in a constant temperature and humidity environment of the museum, but the site still precipitated calcium sulfate (CaSO_4 · 2H_2O). In this study, the causes of calcium sulfate (CaSO 4 · 2H 2 O) were analyzed through the long-term monitoring of the environmental temperature and humidity, the soil evaporation, the ruins of the site and the soluble salts of groundwater in the closed hall of No.13 Hang Hanying. The results show that the environmental humidity in No.13 pit keeps 100% for a long time. Because the surface temperature of the site is higher than the dew point temperature, the water molecules in the air can not be transformed into liquid water on the soil surface and return to the soil. With the surface soil solution concentration Gradually increased, the ions in solution react with each other to precipitate white calcium sulphate on the surface of the site.