Abstract
This paper presents an experimental study to determine the effects of recycled expanded polystyrene aggregates (REPS) on workability, compressive strength, flexural tensile strength, and concrete density. REPS was used with four levels of content: 30%, 40%, 50%, and 60% by volume of concrete. The result shows that when increasing the REPS content, the workability of the concrete mix decreases, especially when the REPS content used is up to 50-60%. The density of recycled expanded polystyrene concrete (REPSC) can be adjusted to 800-1000 kg/m3 when the REPS content is up to 50%-60%. The compressive and flexural tensile strengths of the REPSC tended to decrease sharply with increasing REPS content. In addition, the influence of the REPS on the flexural tensile strength was lower than that on the compressive strength. The strength of the REPSC can be adjusted by changing the strength of the binder phase through factors such as the W/C ratio and binder content.
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