The effect of recycled waste polystyrene plastic aggregate on the engineering properties of lightweight composites

  • Le Van Huu Tinh Faculty of Civil Engineering, College of Engineering, Can Tho University, Campus II, 3/2 street, Ninh Kieu district, Can Tho city, Vietnam
  • Tran Nguyen Khang Faculty of Civil Engineering, College of Engineering, Can Tho University, Campus II, 3/2 street, Ninh Kieu district, Can Tho city, Vietnam
  • Pham Tuan Khoi Faculty of Civil Engineering, College of Engineering, Can Tho University, Campus II, 3/2 street, Ninh Kieu district, Can Tho city, Vietnam
  • Nguyen Quoc Hung Faculty of Civil Engineering, College of Engineering, Can Tho University, Campus II, 3/2 street, Ninh Kieu district, Can Tho city, Vietnam
  • Pham Thanh Qui Faculty of Civil Engineering, College of Engineering, Can Tho University, Campus II, 3/2 street, Ninh Kieu district, Can Tho city, Vietnam
  • Lam Tri Khang Faculty of Civil Engineering, College of Engineering, Can Tho University, Campus II, 3/2 street, Ninh Kieu district, Can Tho city, Vietnam
  • Trong-Phuoc Huynh Faculty of Civil Engineering, College of Engineering, Can Tho University, Campus II, 3/2 street, Ninh Kieu district, Can Tho city, Vietnam
DOI: https://doi.org/10.31814/stce.huce2025-19(1)-03
Keywords: Engineering properties, recycled lightweight aggregate, waste polystyrene plastic, lightweight composites

Abstract

The substantial generation of polystyrene waste from the food industry poses significant environmental and
human health challenges. This study addresses these issues by using recycled lightweight aggregates (RLWA)
from waste polystyrene plastic as an alternative for coal bottom ash in the production of lightweight composites
(LWC) incorporating ternary binder materials of cement, fly ash, and ground granulated blast-furnace slag. To
assess the impact of RLWA on LWC’s engineering performance, various proportions of RLWA were incorporated into the LWC mixtures as a fine aggregate. Results show that RLWA content significantly influenced the mechanical and durability properties of LWC. Specifically, increasing RLWA content reduced the dry density
and mechanical strength, while increasing the water absorption and drying shrinkage of the LWC. The correlations among these LWC’s properties were also examined. Notably, the LWC specimen with 50% RLWA
content achieved the highest 28-day flexural strength of 11.06 MPa and compressive strength of 63.8 MPa,
alongside the lowest water absorption rate of 5.34% with a dry density of 1896 kg/m3. These results underscore the potential of utilizing RLWA as a fine aggregate in LWC production, highlighting its feasibility for practical applications and providing information for more sustainable construction practices. By turning wastes into useful construction materials, the study not only addresses waste management issues but also contributes to the development of greener materials for sustainable growth.

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Published
25-03-2025
How to Cite
Huu Tinh, L. V., Nguyen Khang, T., Tuan Khoi, P., Quoc Hung, N., Thanh Qui, P., Tri Khang, L., & Huynh, T.-P. (2025). The effect of recycled waste polystyrene plastic aggregate on the engineering properties of lightweight composites. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE, 19(1), 21-35. https://doi.org/10.31814/stce.huce2025-19(1)-03
Issue
Vol 19 No 1 (2025)
Section
Research Papers

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