Design of Sustainable Self-Compacting Concrete and its Influence on Mechanical Behavior with Recycled Aggregates

Chavarry Vallejos C.M.; Chavarría Reyes L.J.; Támara Rodríguez J.S.; Pereyra Salardi E.; Escobar Serrano J.C.; Pazos Sedano K.R.; Minaya Huerta D. · Proceedings of the LACCEI international Multi-conference for Engineering, Education and Technology (2025) · DOI: 10.18687/leird2025.1.1.173

Resumen

This research focused on analyzing the use of recycled aggregates from construction and demolition waste (CDW) to improve the mechanical properties of self-compacting concrete (SCC). Natural aggregates were replaced by CDW in proportions ranging from 25% to 100% by weight. Methodologically, a documentary, descriptive, and retrospective approach was utilized, based on international articles. The main results indicate that the slump flow of SCC varied between 560 mm and 685 mm, and the filling capacity between 0.82 and 0.94, meeting SCC requirements. Regarding mechanical properties, the compressive strength of concrete with recycled aggregate (RA) ranged from 25 MPa to 65 MPa. The indirect tensile strength varied from 2.65 MPa to 4.35 MPa, and the flexural strength fluctuated between 5.61 MPa and 6.52 MPa, with a peak of 6.52 MPa at 25% CDW. These findings highlight the potential of CDW for sustainable concrete manufacturing, contributing to waste reduction and natural resource conservation, thereby minimizing environmental impact. Samples included supplementary cementitious materials and superplasticizers to optimize performance. This work demonstrates the viability of SCC with CDW as an ecological and efficient construction solution for civil engineering. © LEIRD 2025.All rights reserved.

Instituciones: Universidad Ricardo Palma; Universidad Nacional Santiago Antúnez de Mayolo