What does this research mean for the field?

Incorporating recycled PET fibers in EPS-modified self-compacting concrete enhances mechanical strength up to 200°C, but the concrete experiences severe mechanical degradation at temperatures of 400°C and above. Novelty: ClaimNovelty.INCREMENTAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To evaluate the fresh properties and residual mechanical performance of self-compacting concrete modified with expanded polystyrene beads and recycled polyethylene terephthalate fibers under exposure to temperatures up to 600°C.

August 27, 2026World Journal of Engineering

Mechanical performance of EPS-self compacting concrete reinforced with waste plastic fibers under elevated temperatures

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To evaluate the fresh properties and residual mechanical performance of self-compacting concrete modified with expanded polystyrene beads and recycled polyethylene terephthalate fibers under exposure to temperatures up to 600°C.
Prepared five self-compacting concrete mixtures: a reference mix, a mix with 10% coarse aggregate replaced by EPS beads, and three mixes incorporating PET fibers at 0.35%, 0.5%, and 0.75% by volume.
Assessed fresh properties using slump flow, T50, V-funnel, L-box, and sieve segregation tests to identify the optimal fiber volume fraction (0.5%).
Exposed the reference, 10% EPS, and 0.5% PET fiber mixes to thermal regimes of 25°C, 100°C, 200°C, 400°C, and 600°C to measure residual compressive and flexural strengths.
Incorporating 10% EPS beads improved concrete workability but reduced mechanical strength, whereas adding 0.5% PET fibers enhanced compressive and flexural strength through crack-bridging mechanisms.
Residual compressive and flexural strengths increased across mixtures at 200°C relative to baseline due to continuous cement hydration and microstructural densification.
Substantial mechanical degradation occurred at temperatures of 400°C and above due to matrix dehydration, cracking, and decomposition, culminating in severe structural deterioration at 600°C.

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Implication

Experimental study demonstrates that PET fibers enhance residual strength in EPS self-compacting concrete up to 200°C, highlighting thermal limits for recycled plastic concrete mixes.

Cite This Study

Husain et al. (2026) studied this question.

synapsesocial.com/papers/6a8fea0110c91c1e92621f01 https://doi.org/10.1108/wje-08-2025-0602

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Implication

Experimental study demonstrates that PET fibers enhance residual strength in EPS self-compacting concrete up to 200°C, highlighting thermal limits for recycled plastic concrete mixes.

Mechanical performance of EPS-self compacting concrete reinforced with waste plastic fibers under elevated temperatures

Key Points

Discussion

Implication

Cite This Study

Mechanical performance of EPS-self compacting concrete reinforced with waste plastic fibers under elevated temperatures

Key Points

Discussion

Implication

Cite This Study

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