Shear Strength of a Crushed Sandstone-Mudstone Particle Mixture
Keywords:Mixture, shear strength, dry density, water content, wetting, experiment.
The present study focuses on the shear strength of a crushed sandstone-mudstone particle mixture. The mixture is widely used as a main filling material in many geotechnical engineering works. In order to investigate the shear strength of the mixture, triaxial tests under different confining pressures in laboratory are performed for 108 specimens with different dry densities and water contents. The dry density of the specimens ranges from 1.80 to 2.10 g/cm3, and the water content from 4.00 to 9.00 % and to saturation. In the tests, four confining pressures, which are 100, 200, 300 and 400 kPa, are applied. The testing results indicate that the angle of shearing resistance of the mixture in unsaturated state ranges from 16.90 to 32.98Â°. The angle of shearing resistance is generally decreasing with the increase of the confining pressure. With the increase of the dry density, the angle of shearing resistance increases. The angle is generally increasing then decreases as a parabola with the increase of the water content. The wetting may decrease the value of the angle about 0.4 to 2.7Â°.
Wang J-J, Zhang H-P, Deng D-P, Liu M-W. Effects of mudstone particle content on compaction behavior and particle crushing of a crushed sandstone-mudstone particle mixture. Eng Geol 2013a; 167: 1-5. http://dx.doi.org/10.1016/j.enggeo.2013.10.004
Fakhimi A, Hosseinpour H. Experimental and Numerical Study of the Effect of an Oversize Particle on the Shear Strength of Mined-Rock Pile Material. Geotech Test J 2011; 34: 131-138.
Azéma E, Estrada N, Radjaï F. Nonlinear effects of particle shape angularity in sheared granular media. Phys Rev E 2012; 86: 041301. http://dx.doi.org/10.1103/PhysRevE.86.041301
Wang J-J, Zhang H-P, Tang S-C, Liang Y. Effects of particle size distribution on shear strength of accumulation soil. J Geotechn Geoenviron Eng ASCE 2013b; 139(11): 1994-1997. http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0000931
Walsh K, Houston W, Houston S. Evaluation of In?Place Wetting Using Soil Suction Measurements. J Geotechn Eng ASCE 1993; 119(5): 862-873. http://dx.doi.org/10.1061/(ASCE)0733-9410(1993)119:5(862)
Lim Y, Miller G. Wetting-induced compression of compacted Oklahoma soils. J Geotech Geoenviron Eng ASCE 2004; 130(10): 1014-1023. http://dx.doi.org/10.1061/(ASCE)1090- 0241(2004)130:10(1014)
Park S. Effect of wetting on unconfined compressive strength of cemented sands. J Geotech Geoenviron Eng ASCE 2010; 136(12): 1713-1720. http://dx.doi.org/10.1061/(ASCE)GT.1943-5606.0000399
Charles JA, Watts KS. The influence of confining pressure on the shear strength of compacted rockfill. Géotechnique 1980; 30(4): 353-367. http://dx.doi.org/10.1680/geot.1918.104.22.1683
Fannin RJ, Eliadorani A, Wilkinson JMT. Shear strength of cohesionless soils at low stress. Géotechnique 2005; 55(6): 467-478. http://dx.doi.org/10.1680/geot.2005.55.6.467
How to Cite
Copyright (c) 2014 International Journal of Architectural Engineering Technology
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.