Determination of Shear Strength Parameters of Municipal Solid Waste from Its Physical Properties

2018 ◽  
Vol 43 (S1) ◽  
pp. 193-201 ◽  
Author(s):  
Amin Falamaki ◽  
Shayan Shahin
Keyword(s):  
Shear Strength ◽  
Physical Properties ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Shear Strength Parameters ◽  
Strength Parameters

Study on the Shear Strength Parameters for Municipal Solid Waste with Higher Content of Organic Matter

2011 ◽  
Vol 295-297 ◽  
pp. 454-459 ◽  
Author(s):  
Zhen Ying Zhang ◽  
Da Zhi Wu
Keyword(s):  
Shear Stress ◽  
Shear Strength ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Test Specimen ◽  
Void Ratio ◽  
Direct Shear ◽  
Shear Strength Parameters ◽  
Strength Parameters ◽  
Initial Void Ratio

Basing on the new developed direct shear testing instrument and the tri-axial test instrument with large scale specimen, the shear strength parameters of municipal solid waste has been studied. The municipal solid waste is divided into three parts: the material that is easy to be biodegraded, reinforced material that is difficult to be biodegraded and the incompressible solid waste material. The proportions of these three parts are selected as 80%, 5% and 15%, respectively. A series of laboratory tests have been performed for different initial void ratios, different vertical pressures and different confining pressures applied on the test specimen. Testing results show that the initial void ratio is the main influence factor for the shear strength parameters of the municipal solid waste, the relationship between the shear stress and the shear strain is a strain hardening curve, the shear stress increases gradually with the shear strain. Besides, the principle effective stress increases with the axial strain and the confining pressure in a hardening increasing trend, and the principle effective stress decreases with the increase of the initial void ratio of the municipal solid waste. The shear strength shows a linear relationship to the vertical pressure applied on the test specimen, and it is in accordance with the law of coulomb. According to the testing results of the direct shear test and the tri-axial test, the shear strength parameters are obtained. The cohesion varies from 4.7 to 12.2kPa, and the internal friction angle varies from 14.5 to 28.2 degree.

Study on the Biodegradation Strength Properties for Municipal Solid Waste with Higher Content of Organic Matter

2011 ◽  
Vol 71-78 ◽  
pp. 918-922
Author(s):  
Zhen Ying Zhang ◽  
Da Zhi Wu
Keyword(s):  
Shear Stress ◽  
Organic Matter ◽  
Shear Strength ◽  
Municipal Solid Waste ◽  
Shear Strain ◽  
Solid Waste ◽  
Test Specimen ◽  
Influence Factor ◽  
Strength Properties ◽  
Strength Parameters

Basing on the new developed direct shear testing instrument, the biodegradation strength properties and strength parameters of municipal solid waste with higher content of organic matter have been studied. The municipal solid waste is divided into three parts: the material that is easy to be biodegraded, reinforced material that is difficult to be biodegraded and the incompressible solid waste material. The proportions of these three parts are 80%, 5% and 15%, respectively. A series of laboratory tests have been performed for different initial void ratios and different vertical pressures applied on the test specimen. Testing results show that the initial void ratio is the main influence factor for the biodegradation strength of the municipal solid waste, the relationship between the biodegradation shear stress and the shear strain is a strain hardening curve, the biodegradation shear stress gradually increases with the shear strain. Besides, the biodegradation shear strength shows a linear relationship to the vertical pressure applied on the test specimen, and it is in accordance with the law of coulomb. According to the testing results, the biodegradation shear strength parameters of municipal solid waste are obtained. The cohesion varies from 11.5 to 24.0kPa, and the internal friction angle varies from 8.3 to 29.0 degree.

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