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Structural Behaviour of Reinforced Concrete Beam with Embedded Polystyrene Spheres

Author(s): Jen Hua Ling , Ji Wei Lau , Yong Tat Lim
Author(s) information:
Centre for Research of Innovation & Sustainable Development, School of Engineering and Technology, University of Technology Sarawak, 96000 Sibu, Sarawak, Malaysia

Corresponding author

The beam is a structural element in a reinforced concrete structure. However, its weight places additional strain on the columns and foundations.Polystyrene spheres can be used to replace concrete in a beam to reduce its weight. However, this can affect the beam’s structural performance. This study investigated the behavior of beams with embedded polystyrene spheres under loads. The purpose was to determine the feasibility of this technique. Six beam specimens, including a control specimen, were tested under the four-point load setup. The polystyrene spheres’ diameter ranged from 50 mm to 75 mm. The spacing between the spheres varied from 10 mm to 30 mm. By replacing 8.7% of the concrete, the beam's strength increased by 8% per unit of concrete. The polystyrene spheres marginally altered the load capacity but reduced the stiffness, uncracked load, and ductility. The load capacity decreased by 2.6% as the polystyrene sphere’s diameter increased from 50 mm to 10 mm. The strength increased by 0.6% as the spacing increased from 10 mm to 30 mm. For satisfactory performance, the polystyrene spheres with a diameter of 0.57 times the beam’s width may be spaced at 1.2 times the concrete cover.

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About this article

SUBMITTED: 01 January 2023
ACCEPTED: 05 February 2023
PUBLISHED: 7 February 2023
SUBMITTED to ACCEPTED: 36 days
DOI: https://doi.org/10.53623/csue.v3i1.180

Cite this article
Ling, J. H., Lau, J. W. ., & Lim, Y. T. . (2023). Structural Behaviour of Reinforced Concrete Beam with Embedded Polystyrene Spheres. Civil and Sustainable Urban Engineering, 3(1), 25–39. https://doi.org/10.53623/csue.v3i1.180
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