Stress and Strain Behavior of Confined Lightweight Concrete using Sand Coated Polypropylene Coarse Aggregate

Heru Purnomo, Heru Baskoro, Fadhilah Muslim

Research output: Contribution to journalArticlepeer-review

Abstract

Plastic waste greatly contributes to environmental pollution; therefore, using plastic waste in various applications, such as in concrete, is an important waste reduction strategy which could be contributed by the construction industry. This study presents the development of a concrete stress and strain model under compression for confined concrete specimens using polypropylene plastic as a substitution for coarse aggregate. Various short-column specimens were analyzed for stress and strain characteristics, effect of steel confinement, and compressive performance. Steel confinement increased the compressive strength and ductility of the section. The parametric identification of a stress-strain model defined for normal concrete was used in the experimental results to obtain new parameter values for the confinement coefficients k1 that are suitable for cylindrical and square lightweight concrete sections. The stress-strain diagrams for lightweight concrete of experimental cylinder and square column specimens, compared with the stress-strain modeled by the modified coefficients, indicate a fairly close agreement.

Original languageEnglish
Pages (from-to)1261-1272
Number of pages12
JournalInternational Journal of Technology
Volume12
Issue number6
DOIs
Publication statusPublished - 2021

Keywords

  • Compression
  • Confinement
  • Lightweight concrete
  • Polypropylene aggregate
  • Stress-strain

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