Year: 2026 | Month: July | Volume: 13 | Issue: 7 | Pages: 144-149
DOI: https://doi.org/10.52403/ijrr.20260717
Improvement of Pambal Laterite by Adding Fly Ash for High-Performance Pavement Design
Mor Diop1, Djibril Sow2
1,2Department de Génie Civil, Institut Universitaire de Technologie, Université Iba Der Thiam, Thiès, Sénégal.
Corresponding Author: Mor Diop
ABSTRACT
In the context of improving the overall service level of communications in Senegal through the construction of next-generation transport infrastructure, this study focuses on methods for upgrading road materials to contribute to the design of high-performance pavements. The objective is to improve the quality of low-bearing lateritic soils for their use in road construction.
The methodology involves a geotechnical characterization of laterite from the Pambal quarry (Tivaouane Department, Thiès Region, in western Senegal), followed by experimental testing of mixtures treated with fly ash from the Senegal Chemical Industries (ICS) in Mboro. Laboratory tests revealed a significant improvement in mechanical properties, with the California Bearing Ratio (CBR) increasing from 77 to 153 at a 4% fly ash content.
These findings confirm the technical feasibility of this approach and highlight a sustainable, cost-effective, and eco-friendly alternative to traditional stabilization methods. The combined use of local laterite and industrial by-products opens new perspectives for the development of the national road network.
Keywords: CBR index, improvement, fly ash from ICS Mboro, high-performance pavement, Pambal laterite.
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