Impact of Oriented Clay Particles on X-Ray Spectroscopy Analysis

Soft Soil Engineering International Conference 2015

Lim, A.J.M.S.^1,2 ; Syazwani, R.N.^1 ; Wijeyesekera, D.C.^1,2

F Faculty of Civil and Environmental Engineering, Universiti Tun Hussein Onn Malaysia, Batu Pahat Johor

86400, Malaysia^1

Research Center for Soft Soil, Universiti Tun Hussein Onn Malaysia, Batu Pahat Johor

86400, Malaysia^2

关键词: Chemical characterization;    Clay mineralogy;    Clay particles;    Engineering properties;    Mineral analysis;    Quantitative evaluation;    Sample preparation techniques;    Soil characterization;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/136/1/012012/pdf
DOI  :  10.1088/1757-899X/136/1/012012

来源: IOP

【 摘 要 】

Understanding the engineering properties of the mineralogy and microfabic of clayey soils is very complex and thus very difficult for soil characterization. Micromechanics of soils recognize that the micro structure and mineralogy of clay have a significant influence on its engineering behaviour. To achieve a more reliable quantitative evaluation of clay mineralogy, a proper sample preparation technique for quantitative clay mineral analysis is necessary. This paper presents the quantitative evaluation of elemental analysis and chemical characterization of oriented and random oriented clay particles using X-ray spectroscopy. Three different types of clays namely marine clay, bentonite and kaolin clay were studied. The oriented samples were prepared by placing the dispersed clay in water and left to settle on porous ceramic tiles by applying a relatively weak suction through a vacuum pump. Images form a Scanning Electron Microscope (SEM) was also used to show the comparison between the orientation patterns of both the sample preparation techniques. From the quantitative analysis of the X-ray spectroscopy, oriented sampling method showed more accuracy in identifying mineral deposits, because it produced better peak intensity on the spectrum and more mineral content can be identified compared to randomly oriented samples.