Preservation of earthen heritage sites on the Silk Road,northwest China from the impact of the environment |
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Authors: | Li Li Mingshen Shao Sijing Wang Zuixiong Li |
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Institution: | (1) Institute of Geology and Geophysics, CAS, Beijing, 100029, China;(2) College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, 730000, Gansu, China;(3) Dunhuang Academy, Dunhuang, 736200, Gansu, China |
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Abstract: | The Silk Road played an important role in the economic and cultural exchanges between central China, Europe and Central Asia.
A number of heritage sites with significant values still remain throughout the Gobi Desert and other desert regions in Northwest
China. Most of the heritage sites composed of adobeern materials and the earthen structures have been impacted by adverse
environmental conditions for thousands of years causing severe damage with only a small proportion of the structures left
surviving to the present day. Analysis of the main environmental factors affecting the heritage sites such as temperature
difference, wind storms, rain storms, and the freeze–thaw process and a study of the mechanism of the deterioration are the
main topics presented in this paper. The authors have concluded that a Potassium–Silica solution PS invented by one of the
authors has been effective in improving the intrinsic properties of heritage site earthen structures with regard to reducing
the impact of environmental damage. The results of comparative tests show that samples treated by using the PS solution have
performed well, particularly in protecting structures from aeolian erosion and heavy rainfall. Some findings on the effect
of PS treatment on earthen structures at heritage sites are discussed in detail in the present paper. |
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