Physico‐Mechanical, Mineralogy, and Microstructural Properties and Durability of Mortars Made With Alluvial Sands

Abstract

Concrete structures built from local materials are prolific, and mastery of their intrinsic properties is a guarantee of rational use. This study, based on an experimental approach, analyzes the construction potential of three alluvial sands (Mandikoum [MA], Ndom [ND], and Vack [VA]) used in Adamawa. Sand identification tests showed that the particle size distribution curves are S‐shaped. Sand equivalent values varied between 96% and 99%, characteristic of very clean sand. The fineness modulus values vary between 2.61 and 3.16, corresponding to medium‐grained sand (VA sand) and coarse‐grained sand (MA and ND sand). Mortars were then formulated using these sands, and the properties studied focused on mechanical, mineralogical, durability, and microstructural aspects. The results show that the mortar with MA sand has high geotechnical, mechanical compressive strength (31.82 MPa), microstructural, and durability properties. The ND and VA mortars, with compressive strengths of 24.66 MPa and 17.55 MPa, respectively, had lower microstructural and durability properties.