Crushing Performance of Ultra-Lightweight Foam Concrete with Fine Particle Inclusions

Yu Song, David A Lange

Research output: Contribution to journalArticle

Abstract

Foam concrete is a low-density controlled strength material that can potentially be used for accommodating different types of particles-recycled fine aggregate being an example. The paste matrix of this material has a cellular microstructure, and bulk performance is readily affected by the inclusion of fines. To study the effect of inclusion of fines on mechanical performance and foam structure of foam concrete, a group of 0.55 g/cm 3 foam-sand composite mixtures with high-volume fly ash replacement are investigated. The elastic modulus is measured by a vibrational frequency test. The crushing mechanics are determined by the load-displacement response from a penetration test. The effect of particle inclusion on the foam concrete microstructure is characterized using micro computed tomography. The results indicate that use of fine-graded sand particles at a small dosage simultaneously reduces cement content and enhances the crushing performance, however poor material performance is observed for a high sand content. The cellular structure of the foam-sand composite, and thus its mechanical behavior, can be substantially diminished by larger sand particles, especially when the particle size is larger than the voids in foam.

Original languageEnglish (US)
Article number876
Number of pages14
JournalApplied Sciences (Switzerland)
Volume9
Issue number5
DOIs
StatePublished - Mar 1 2019

Keywords

  • Cellular concrete
  • Ceramic foam
  • Crushing
  • CT
  • Energy absorbing
  • Foam concrete
  • Foam stability
  • Foam structure
  • Modulus

ASJC Scopus subject areas

  • Materials Science(all)
  • Instrumentation
  • Engineering(all)
  • Process Chemistry and Technology
  • Computer Science Applications
  • Fluid Flow and Transfer Processes

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