Influence of Aggregate Grain Size on the Formulation of Sand Concrete in the Construction Industry in Congo

Abstract

The main objective of this study is to contribute to the optimization of the formulation of sand concretes and its valorisation according to natural sands from different quarries or extraction sites. Physical characteristics of natural sands have been determined and improved by the addition of crushing sand, taking into account the too fine elements of the sand. Four types of sand were used (Congo River, Djiri, Mfilou, crushed sand). The concrete formulations proposed from improved sands (30% crushed sand and 70% natural sand) reveal an increase in mechanical strength. Thus, it appeared that this improvement of the natural fine sands by the crushing sand has brought a clear increase in the maneuverability of the concretes and the physico-mechanical characteristics of nearly 50%, although this crushing sand has a sand equivalent value of less than 70%. These results augur well for the durability of structures in the construction industry in Congo.

Physical and geotechnical characterization of Bambui River sands, Northwest Region Cameroon to produce sustainable micro-concrete roofing tiles

“…Several studies have investigated various aspects of MCR tile production, including material properties, mix design optimization, curing methods, and the incorporation of waste materials. Choi and Choi (2013) and Nkengue et al (2019) investigated the effect of using river sand, sea sand, and quarry sand on the properties of concrete, it follows that the properties of concrete change when the origin or quality of the sand is modified (Haitham, 2018). Ogunbiyi and Olugbenga (2016) explored the mechanical properties of MCR tiles using different curing methods, highlighting the importance of proper curing techniques in ensuring the durability and performance of the tiles.…”