Classification and Efficient Utilization Technology of Red-bed Mudstone Roadbed Filler
Red-bed mudstone is widely distributed in Southwest,Northwest,Central China,and South China regions in our country.Using red-bed mudstone for roadbed filler helps to improve economic efficiency and reduce environmental damage.However,the efficient utilization technology of red-bed mudstone filler still needs further research.Due to the special hydrological characteristics of red-bed mudstone,scientific classification of red-bed mudstone is extremely important.Different grades of red-bed mudstone require different engineering disposal methods,and scientific classification of red-bed mudstone is the prerequisite for efficient utilization of red-bed mudstone.Based on the research of red-bed mudstone subgrade disease,this paper analyzes the causes and classification of the disease.Through rock slake durability test and DEM numerical simulation,the macro and mesoscopic disintegration mechanism of red-bed mudstone under the coupling of"humidity and load"is revealed,and the durability control index is obtained.The classification method of red-bed mudstone based on disintegration resistance index Id can effectively distinguish the long-term engineering characteristics of different red-bed mudstone filler.Finally,the efficient utilization technology of red-bed mudstone filler is summarized and successfully applied in practical engineering construction.
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