典型文献
A model of unfrozen water content in rock during freezing and thawing with experimental validation by nuclear magnetic resonance
文献摘要：
The unfrozen water content of rock during freezing and thawing has an important influence on its physical and mechanical properties.This study presented a model for calculating the unfrozen water content of rock during freezing and thawing process,considering the influence of unfrozen water film and rock pore structure,which can reflect the hysteresis and super-cooling effects.The pore size dis-tribution curves of red sandstone and its unfrozen water content under different temperatures during the freezing and thawing process were measured using nuclear magnetic resonance(NMR)to validate the proposed model.Comparison between the experimental and calculated results indicated that the theoretical model accurately reflected the water content change law of red sandstone during the freezing and thawing process.Furthermore,the influences of Hamaker constant and surface relaxation parameter on the model results were examined.The results showed that the appropriate magnitude order of Hamaker constant for the red sandstone was 10-19 J to 10-18 J;and when the relaxation parameter of the rock surface was within 25-30 μm/ms,the calculated unfrozen water content using the proposed model was consistent with the experimental value.
文献关键词：
中图分类号：
作者姓名：
Zhouzhou Su;Xianjun Tan;Weizhong Chen;Hailiang Jia;Fei Xu
作者机构：
State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,430071,China;University of Chinese Academy of Sciences,Beijing,100049,China;College of Architecture and Civil Engineering,Xi'an University of Science and Technology,Xi'an,710054,China;Structural Health Monitoring and Control Institute,Shijiazhuang Tiedao University,Shijiazhuang,050043,China
文献出处：
引用格式：
[1]Zhouzhou Su;Xianjun Tan;Weizhong Chen;Hailiang Jia;Fei Xu-.A model of unfrozen water content in rock during freezing and thawing with experimental validation by nuclear magnetic resonance)[J].岩石力学与岩土工程学报（英文版）,2022(05):1545-1555
A类：
Hamaker
B类：
model,unfrozen,water,content,rock,during,freezing,thawing,experimental,validation,by,nuclear,magnetic,resonance,has,important,its,physical,mechanical,properties,This,study,presented,calculating,process,considering,film,pore,structure,which,can,hysteresis,super,cooling,effects,size,dis,tribution,curves,sandstone,under,different,temperatures,were,measured,using,NMR,validate,proposed,Comparison,between,calculated,results,indicated,that,theoretical,accurately,reflected,change,law,Furthermore,influences,constant,surface,relaxation,parameter,examined,showed,appropriate,magnitude,order,was,when,within,ms,consistent,value
AB值：
0.429118
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