Abstract—The depletion of natural deposits of aggregates and the difficulties to open new quarries make it necessary to look for new sources of supply. Recycling and waste recovery are now considered as an alternative solution in the future. Aggregates are considered essential components in the composition of ordinary concrete or concrete for specific use. Such utilization of recycled aggregates is of great importance from a technical and environmental point of view. The present study concerns the use of aggregates from the crushing of concrete waste as a replacement for natural aggregates with a sand of standardized particle size of determined fractions. An experimental program for the characterization of a local recycled concrete based on prepared sand was planned. Four types of concrete were formulated including a control concrete mixture with crushed aggregates, 8/16 recycled concrete gravel fraction and prepared sand. The substitution amount of the fine fraction of prepared sand was 15% for slag and 10% pozzolan as mineral additions. The principal objective of this research work is to study the effect of partial substitution of recycled aggregates on the physical and mechanical characteristics and on the resistance to aggressive environments of a local recycled concrete based on prepared sand. The results obtained show the positive effect of using a recycled local sand-based concrete on the mechanical properties of concrete while keeping an acceptable workability for the studied concrete mixtures.
Keywords— Recycled concrete, prepared sand, aggressive environment, slag, pozzolan.
Citation
Larbi BELAGRAA ,
BOUMEDIENE MEHSAS ,
NOUI Ammar, SLIMANI Samir, ,(2019), Study of Physico-mechanical Characteristics of Concrete made with Recycled Gravel and Prepared Sand,4th ISMSD2019 (4eme CIMDD2019) Boumerdes - Algeria, November 12 - 14, 2019,oumerdes - Algeria, November 12 - 14, 2019
