Uso del ladrillo reciclado triturado como sustituto del agregado fino en diseño de hormigón de 21 MPa

Catherine| Bravo-Segovia; Yeniffer Monserrate Lugo-Castillo; Juan Carlos Guerra-Mera

Authors

Bravo-Segovia Catherine Carrera de Ingeniería Civil, Facultad de Ciencias Matemáticas, Físicas y Químicas, Universidad Técnica de Manabí. Portoviejo, Manabí, Ecuador.
Lugo-Castillo Yeniffer Monserrate Carrera de Ingeniería Civil, Facultad de Ciencias Matemáticas, Físicas y Químicas, Universidad Técnica de Manabí. Portoviejo, Manabí, Ecuador.
Guerra-Mera Juan Carlos Departamento de Construcciones Civiles, Facultad de Ciencias Matemáticas, Físicas y Químicas, Universidad Técnica de Manabí, Portoviejo, Manabí, Ecuador.

Keywords:

Crushed bricks, compression resistance, aggregates, workability, mix design

Abstract

One of the main problems in the construction industry is the solid waste that comes from the demolition of old buildings and that is not disposed of technically. To provide a solution, for reusing this waste, it is important to have technical studies that support the use of recycled crushed bricks as a substitute for fine aggregate and to be able to determine its viability and resistance. This study aims to analyze the use of crushed recycled brick as a substitute for fine aggregate in a 21 MPa design, per INEN and ACI 318 standards. The methodology used is of a mixed nature, being both descriptive and experimental. For this purpose, fine and coarse aggregates from two quarries located in different provinces of Ecuador were used. The fine aggregate was substituted in percentages of 15, 20, 25 and 30%, with the elaboration of 5 mix designs, being the initial mix the standard one, and a constant water/cement ratio of 0.55; in addition, a super plasticizing additive was used. Thirty-five concrete cylinders of 100 x 200 mm were made, which were subjected to compressive strength and it was possible to determine which percentage was the most optimal. With this, it was possible to demonstrate that a concrete composed of crushed recycled bricks, substituting up to 25% of the fine aggregate, is resistant and workable.

Keywords: Crushed bricks, compression resistance, aggregates, workability, mix design.

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