Abstract
The purpose of this work consists of valorizing a local sand dune which is found in abundance in the region of Djelfa (Algeria); for use in pavement foundations. For this investigation a method of formulation has been proposed, which based on the stabilization of this material using a mixture of two hydraulic binders. Various mixtures were subjected to classification tests, tests grain size distributions, tests of compaction with modified Proctor, shear strength, tests of bearing pressure (CBR unsoaked and soaked), compressive strength and tensile strength. The results obtained have shown that some mixtures are of high mechanical characteristics and could be then used in road foundations.
Highlights
The roads undergo excessive deformation at the level of their various layers
We report on the improvement of the physical and mechanical characteristics of dune sand used for road construction
Our results show that the incorporation of pozzolan + lime tends to improve the compaction optimal characteristics of the mixtures as compared to those of the dune sand with no adding
Summary
The roads undergo excessive deformation at the level of their various layers This implies the use of often very expensive maintenance work. The current trend of nowadays research is the exploitation of local materials This has prompted us to perform the present contribution aiming to the valorization of local materials, in particular the dune sand, in the foundations of pavements (Mehrpazhouh, 2019); (Shalabi, 2021) and (Salour, 2017). We report on the improvement of the physical and mechanical characteristics of dune sand used for road construction. It is shown that by adding a mixed hydraulic binder all the investigated features are found to be improved
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