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| EXPERIMENTAL STUDY OF THE HEAT-CONDUCTION PROPERTIES OF EARTHEN RUINS SOIL REINFORCED BY POTASSIUM SILICATE MATERIALS |
(1. Department of Civil Engineering，Shanghai Jiaotong University，Shanghai 200240，China；
2. Conservation Institute of Dunhuang Academy，Dunhuang，Gansu 736200，China) |
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Abstract As a new type of inorganic reinforced material，potassium silicate(PS) can greatly improve the mechanical strength and the ability of anti-wind erosion of earthen ruins soil after being reinforced. Therefore，a test device for determining the thermal conductivity of ruins soil was developed. Then，soil specimens were made from the disturbed soil collected from site of Jiaohe Ruins；and then，in order to study the influence of PS on the heat transfer process of the soil，the determination test of the thermal conductivity and the laboratory model test were carried out. Test results show that the thermal conductivity of PS reinforced soil is reduced；furthermore，the larger the concentration of PS is，the smaller the thermal conductivity of soil is. In addition，it is found from the laboratory model test that when external temperature changed，the PS reinforced soil responded slower to the temperature change compared with that of the untreated soil；so，it is inferred that due to PS reduced the thermal conductivity of reinforced soil，and the heat transfer process of the soil is hindered. The finding above shows that PS reinforced soil can slow down the physical weathering caused by temperature difference；and this will have an important significance on studying the conservation of earthen ruins in Northwest China arid areas.
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Received: 25 June 2010
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2011, Vol. 30 
