Preliminary Establishment And Application Of Trans-scale Microstructure Model Of Loess

The deformation and strength of loess is closely related to microstructure.From a trans-scale perspective, a new research method is proposed in this paper. It can observe microscopic details on macro scale. By combine space position and composition of mineral,SEM images trans-scale are able to show the real characteristics of macro soil sample. It is important for the microstructure of loess on mechanical properties and the ancient environment.This paper first analysis and discusses the current situation of the development for loess micro structure from the particles,pores,cements and interact factors. A sampler for SEM is invented.The sampler is small in volume and can quickly reach solidification.It can be used to effectively analyze soil microstructure for construction site and laboratory. Fast mineral identification technology is invited. The chromatic value difference between unknown mineral and standard mineral color is average computed to identify mineral.Through averaging the regional color, mineral in cross scale image can be extracted, it can greatly reduce the workload of mineral extraction.Based on the rapid sample preparation method and fast mineral identification technology,2D and 3D loess model are built preliminarily. From a trans-scale perspective, a new research method is proposed in this paper. It can observe microscopic details on macro scale. By combine space position and composition of mineral, SEM images trans-scale are able to show the real characteristics of macro soil sample. It is quick and easy to reconstruct the 3D model by optical microscope, which though unique concentric localization to match each micro-sized images vertically.3D model also could be built though SEM.To locate each image, both centroid and angle of particles must be corrected. The advantage of this method is that it can attribute particles mineral character in 3D model.