Manufacture of Clay Aggregate Doped with Pozzolan Destined for Lightweight Concrete

Abstract

In this work, marl clay was used because these materials have a very important industrial potentiality in several fields, namely ceramics. The objective was manufacturing expanded clay aggregate (ECA), with two main ingredients of marl and pozzolan at different percentages in order to integrate them into the concrete as aggregate. The physicochemical parameters of the mixture marl / Pozzolan was discussed and the results of the analyses, allowed deducing that the sample with 15% pozzolan has the most expansion rate of 16.8%, and its density of 1232 kg/m 3 is in accordance with the international standard of expanded aggregates. The density of the concrete decreases with the quantity of ECA added and reaches its minimum with 1671 kg/m 3 according to concrete with 50% of the expanded aggregate. The bending tests show the increase of the mechanical strength as a function of the quantities of aggregate added. The results show a very important potential with the addition of clay aggregates, density and water absorption decrease with the increase of the mechanical resistance.

Physicochemical and Mechanical Characterization of Ceramic Materials from Meknes Region (Morocco)

“…Depending on the geological environment or kind of rocks in the location where the geographic clays are produced from and the extent of weathering, geographic clay samples show different mineralogical composition (Mesrar et al, 2023;Mesrar et al, 2020). Χ-ray diffraction was carried out on raw marl in the Meknes region of Morocco to study reflections at the base of individual clay minerals and impurities.…”