High temperature performance of recycled fine concrete

• Published in: LOW-CARBON MATERIALS AND GREEN CONSTRUCTION 2024-12, Vol.2 (1), p.1-16, Article 19
• Main Authors: Algourdin, N., Bideux, C., Mesticou, Z., Si Larbi, A.
• Format: Article
• Language: English
• Subjects: Building Construction and Design; Building Materials; Civil Engineering; Engineering; Engineering Sciences; High temperatures; Original Article; Recycled concrete; Renewable and Green Energy; Residual mechanical properties; Sustainable Architecture/Green Buildings; Thermal properties
• ISSN: 2731-6319; 2731-6319
• DOI: 10.1007/s44242-024-00050-w

The objective of this study is to explore the physical and mechanical behaviour of concretes comprising four different ratios of recycled fine (RF), namely (5%, 10%, 15% and 20%) along with that of a reference concrete (Cref-0%), under three different heating–cooling cycles (200 °C, 400 °C and 600 °C). The thermal properties of concrete during heating and cooling (20 °C – 600 °C – 20 °C) were also investigated. It was determined that the physical properties (mass loss and ethanol porosity) of recycled concrete (RC) with 5% of recycled fine (RC-5%) were similar to those of Cref-0%. At ambient temperatures, the higher the ratio of recycled fines, the lower the residual compressive strength and residual elastic modulus of the recycled concrete. After thermal loading at 600 °C, the residual mechanical properties of all types of concrete were equivalent, regardless of the content recycled fine.