Cuantificación de la disminución en la resistencia a la compresión del concreto f’c=215 Kg/cm2, al utilizar agregados de peña (Cantera La Roca y Arenera Dubai) de Boyacá como reemplazo total de los agregados de río (Arenera Chicamocha SAS) comúnmente empleados en el Área Metropolitana de Bucaramanga

Abstract

The search for alternative stone aggregates to those frequently used has become highly relevant in the field of construction, due to the low offer and increased costs of river aggregates in times of drought. Therefore, in this research work we seek to quantify the reduction in the compressive strength of concrete, by replacing the river aggregates used in the metropolitan area of Bucaramanga (CAR concrete) by rock materials marketed in the municipality of Bucaramanga. Barbosa – Santander (concrete CAP). Considering the above, in the Civil Engineering Laboratory of the Santo Tomás University – Bucaramanga Section, the characterization of the aggregates is carried out and thus, the proposed standard mix design (f'c=215 Kg/cm2) based on the ICA methodology. Subsequently, the CAR and CAP concrete mixes are made, the casting of the cylindrical specimens and resistance tests at 3, 7, 14 and 28 days of curing. Finally, it is concluded that the typologies of stone aggregates under study do not fully comply with normative parameters such as grain sizes, sand equivalents, fineness modules, among others. Similarly, when carrying out the total replacement of the river aggregates, the concrete loses workability in its fresh state and its compressive strength decreases by 48% in its supported state, compared to the standard mix.