The urgency to reduce the environmental impact of concrete structures is widely recognized, with the consumption of natural aggregates being a significant concern due to the need for new quarries. Recycled concrete aggregates (RCA) derived from construction and demolition waste offer a viable solution. Composite slabs, made of concrete over a steel sheet, present multiple benefits over traditional slabs, including faster construction, enhanced strength, and environmental advantages. This study examines the mechanical performance of 48 composite slabs with RCA replacement levels ranging from 0% to 100%, across three span lengths (2.4 m, 2.8 m, 3.2 m). Four-point bending tests were conducted, focusing on load-bearing capacity and interface bond strength. Results indicate that slabs with RCA demonstrate structural performance comparable to those without RCA, highlighting its potential as a sustainable construction solution. This research provides insight into optimal RCA levels for composite slabs, balancing sustainability with high mechanical standards.
MECHANICAL PERFORMANCE OF COMPOSITE SLABS WITH RECYCLED CONCRETE AGGREGATES: THE SARCOS PROJECT
Marco Simoncelli;Marco Andrea Pisani;Claudio Bernuzzi
2025-01-01
Abstract
The urgency to reduce the environmental impact of concrete structures is widely recognized, with the consumption of natural aggregates being a significant concern due to the need for new quarries. Recycled concrete aggregates (RCA) derived from construction and demolition waste offer a viable solution. Composite slabs, made of concrete over a steel sheet, present multiple benefits over traditional slabs, including faster construction, enhanced strength, and environmental advantages. This study examines the mechanical performance of 48 composite slabs with RCA replacement levels ranging from 0% to 100%, across three span lengths (2.4 m, 2.8 m, 3.2 m). Four-point bending tests were conducted, focusing on load-bearing capacity and interface bond strength. Results indicate that slabs with RCA demonstrate structural performance comparable to those without RCA, highlighting its potential as a sustainable construction solution. This research provides insight into optimal RCA levels for composite slabs, balancing sustainability with high mechanical standards.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
