Properties of Lightweight Expanded Polystyrene Aggregate Concretes Containing Fly Ash

Expanded polystyrene (EPS) beads can be used as an ultra-lightweight aggregate suitable for developing concretes for both structural and non-structural applications by varying its volume percentage in mortar or concrete. This article reports on a study of the mechanical properties of EPS concretes containing fly ash. The authors compare the results found with those in the literature on concretes containing OPC (ordinary Portland cement) alone as the binder. The compressive strength of the EPS concretes containing fly ash show a continuous gain even up to 90 days, unlike that reported for OPC in literature. The authors also found that the failure of these concretes both in compression and split tension was gradual, as was observed earlier for the concretes containing plastic shredded aggregates. The stress-strain relations and the corresponding elastic modulus were also investigated. The splitting tensile strength decreases with increase in the EPS volume percentage. The ultimate strains observed in the lower density mixes were higher and the stress-strain relations showed higher steepness as the percentage of EPS decreased. The length of propagation of cracks increases with decrease in EPS volume. The authors conclude that all the EPS mixes showed better flow, and no segregation was observed in any mix, even in these concretes made without the addition of bonding additives.

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  • Authors:
    • Babu, D Saradhi
    • Babu, K Ganesh
    • Wee, T H
  • Publication Date: 2005-6


  • English

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  • Accession Number: 01002946
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 4 2005 11:17AM