Variation of geotechnical parameters In the mixture of crushed and rounded Gravels in the north west region of Cameroon by the weight mass method

An article published inside the International Journal of Materials Engineering and Technology © 2017 Pushpa Publishing House, Allahabad, India
Website: ;
(Volume 16, Numbers 1-2, 2017, Pages 1-20 ISSN: 0975-0444 )

Received: December 20, 2016; Accepted: February 5, 2017

Yamb Emmanuel
University of Douala
P.O. Box: 8842, Douala
Bahel Benjamin
University of Douala
P.O. Box: 1872, Douala
Bock Hyeng Christian Alain
School of Technology
North Carolina A&T State University
1601 East Market Street
Greensboro NC, 27411, U. S. A.


       We study the geotechnical parameters (void ratio and hydraulic conductivity) of two types of mixtures of particles (crushed gravel and rounded gravel), and determine the porosity n (or the void ratio e)
along with the permeability or hydraulic conductivity by the weight mass method. A progressive evolution of the void ratio of the three granular classes is established starting with completely crushed gravel to the fully rounded gravel. We establish a dependency of the void ratio in function of the size range for each grain size.
       The study of the permeability or the hydraulic conductivity enables to see a decrease in the evolution of the permeability of different granular classes in function of the shape of the grains. Fully crushed gravels have a higher permeability. We rely on the fact that the values of permeabilities do not follow that of the void ratio and we have established a difference between porosity and drainage which is a function of the stack and grain shape. And then we have established a relationship between the measured values and the predictive values of
Chapuis [4].

Keywords and phrases: void ratio, permeability, rounded gravel, crushed gravel, weight mass.

2017_x_1_PPH-1612058-MET - Final Version

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