The Flint: A New Alternative Material for Flexible Pavements in Senegal

Adama DIONE^1, , Papa Sanou FAYE², Babacar DIOUF³, Cheikh Mahmoud SYLLA¹, Ousmane SOW⁴, Modou MBENGUE¹ and Lissong DIOP¹

¹National Hight School of Mining and Geology (ENSMG ex IST) Cheikh Anta Diop University of Dakar, Senegal

²UFR Sciences and Technologie, Iba Der Thiam University of Thies

³Polytechnic Institute of Saint Louis , Gaston Berger University

⁴LNR-BTP

Cite this paper:
Adama DIONE, Papa Sanou FAYE, Babacar DIOUF, Cheikh Mahmoud SYLLA, Ousmane SOW, Modou MBENGUE and Lissong DIOP. The Flint: A New Alternative Material for Flexible Pavements in Senegal. American Journal of Civil Engineering and Architecture. 2025; 13(4):109-114. doi: 10.12691/ajcea-13-4-4

Abstract

The objective of this work is to study flint as an alternative material for flexible pavements. Samples were taken in Mboro and identification tests were carried out. The results showed that flint has good intrinsic characteristics and good compaction behaviour. In its raw state, flint has a density value of 2.2 and a CBR of 194. When litho-stabilized with laterite, the CBR increases by 19% for a 30% flint content. In bituminous surfacing, the Marshall test gives stability values ranging from 1151 to 1350 kg and creep ranging from 2.72 to 2.24 mm. The Duriez test gives an R'c/Rc value of 0.76 and a void percentage of 7.83% at 80 rotations for the PCG test. The use of flint in hydraulic concrete paving stones provides good tensile strength, which can reach up to 5.9 MPa at 28 days depending on the cement dosage and grain size used. This makes flint an attractive material for road construction and means it can be used as an alternative material for flexible pavements in Senegal.

Keywords:
flint alternative material strength flexible pavement

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