A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Disintegration and abrasion in water of agrillaceous rocks adjacent to coal seams of the Upper Carbon of the Ruhr district are investigated. The degree of decomposition is measured by the time-dependent change of a given grain size distribution during a shaking-test. A statistical evaluation of the individual test results leads to a simple model, which shows the influence of porosity and mineralogical composition on the disintegration. The influence of water leads to a lowering of the surface free energy at the liquid-solid interface. This causes a decrease in strength and facilitates abrasion. The disintegration is the irreversible result of an increase by volume - also called swelling - caused by wetting of clay mineral surfaces. The different degree of wettability of rocks of different composition is documented by measurements of the heat of wetting in water. Increasing clay mineral content results in higher values of heat of wetting. This is the mineralogical aspect of swelling and disintegration. (ERA citation 11:012610)
Disintegration and abrasion in water of agrillaceous rocks adjacent to coal seams of the Upper Carbon of the Ruhr district are investigated. The degree of decomposition is measured by the time-dependent change of a given grain size distribution during a shaking-test. A statistical evaluation of the individual test results leads to a simple model, which shows the influence of porosity and mineralogical composition on the disintegration. The influence of water leads to a lowering of the surface free energy at the liquid-solid interface. This causes a decrease in strength and facilitates abrasion. The disintegration is the irreversible result of an increase by volume - also called swelling - caused by wetting of clay mineral surfaces. The different degree of wettability of rocks of different composition is documented by measurements of the heat of wetting in water. Increasing clay mineral content results in higher values of heat of wetting. This is the mineralogical aspect of swelling and disintegration. (ERA citation 11:012610)
Decomposition Characteristics of Finely Clastic Ruhr Carbon Rocks in Water
U. Maerz (author)
1984
153 pages
Report
No indication
English
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