Randomized trial investigates fire resistance and structural performance of sustainable concrete using waste glass.
Key Points
This research aims to evaluate how fire flame exposure affects the properties of structural lightweight self-compacting concrete with waste glass and micro-steel fibers.
Four concrete mixes were prepared: a control mix and three with 20%, 30%, and 40% waste glass as a partial sand substitute, reinforced with micro-steel fibers.
Fresh properties were tested using slump flow, V-funnel, and L-box tests following EFNARC guidelines.
Hardened properties were measured after exposure to temperatures of 200°C, 400°C, 600°C, and 800°C for assessments of compressive strength and other properties.
The G30+MS mix demonstrated a compressive strength of 52.2 MPa, which is 9.2% higher than the control mix.
At 800°C, this mix retained 35% of its original strength, surpassing the reference mix.
Micro-steel fibers were effective in limiting crack propagation and preventing spalling, maintaining structural integrity after fire exposure.