Experimental Determination of the Poisson's Ratio and the Elastic Modulus of a Sand-Plastic Composite Material

The purpose of this article is to determine a standard value of poisson's ratio which allows, from the ultrasonic test, to calculate the Young's modulus and to predict the compressive strength of the plastic (Low density polyethylene: LDPE) sand mixture. Thus, using two test methods (Direct compression and ultrasound), carried out on samples with variable LDPE contents, the poisson ratio and Young's modulus were determined. The analysis of the results made it possible to fix a standard value of the poisson's ratio usable for the sand-LDPE material. This value has been validated by the results of the dynamic Young's modulus calculation. It also makes it possible, from the non-destructive ultrasound testing on this type of material, to quickly determine the Young's modulus, and to predict the compressive strength.