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Evaluation of the Properties of Local Sands Used in a Cement Mortar and in the Formulation of a Standard Sand to Test the Class of Cements

The aim of this work was to provide a better alternative to the problems of importing standardized sand and to make good use of local sand to produce a quality mortar. Sand samples taken from various locations in the city of Brazzaville were subjected to a number of laboratory tests and to two types of mortar formulation. The results obtained show that local sands (S1-S8) in their natural state are finer and cannot be used as standard sand for cement quality control. However, some local sands can be used in the manufacture of masonry mortar. The mechanical properties of mortars made with these sands are lower than those of mortars made with standard sand, but are strongly correlated with the latter. The reformulation of local sands (S1-S8) mixed with crushed sand S9 considerably improves the mechanical properties of the mortar, which are identical to those of standard sand. The mechanical strength of mortar based on local S3 sand enriched with crusher sand (0/5) is greater than that obtained with standard sand. Reformulated sand can be used as standard sand for cement quality control. The relationship in formulation 2 between the mechanical strength of mortar based on improved local S3 sand and that of standard sand can be used to test cements. Several studies show that it is sometimes difficult to obtain the expected compressive strength of a given cement with standard sand. For the 32.5R cement used, the sands (S1-S3, S5, S6) improved to crushed sand with formulation 2, produce standardized sands for testing cements.

Standard Sand, Mortar, Crushed Sand, Normative Zones, Particle Seize Analysis, Sand Equivalent

Brige Dublin Boussa Elenga, Louis Ahouet, Sylvain Ndinga Okina. (2023). Evaluation of the Properties of Local Sands Used in a Cement Mortar and in the Formulation of a Standard Sand to Test the Class of Cements. Advances in Materials, 12(3), 31-38.

Copyright © 2023 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License ( which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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