Evaluation of ultralightweight foamed glass aggregates in precast concrete

Grady Mathews, Brady Wertz, Taha Khan, Khashayar Jafari, Theresa Loux, Robert Bylone

Research output: Contribution to journalArticlepeer-review

Abstract

This project investigates the use of foamed glass aggregates in lightweight precast concrete. Precast mixes are evaluated for compression and split-tension strength, and durability is assessed through rapid chloride permeability, thermal conductivity, alkali silica reactivity, and freeze–thaw performance. Mixes containing a 100% or 50% replacement of gravel with foamed glass aggregates are evaluated. The 100% mixes have a 28-day compression strength = 23.3–27.89 MPa which is acceptable per structural lightweight concrete standards (ASTM C330), but the split-tension strength falls short of ASTM C330 requirements. The 50% mixes have acceptable strength but exceed the maximum density allowed for lightweight concrete in ASTM C330. The mixes exhibited low–moderate permeability but poor freeze–thaw resistance. All of the proposed mixes with one exception have acceptable expansion due to alkali silica reactivity. The thermal conductivity of the mixes varies from typical lightweight to normal weight concrete ranges with respect to the aggregate replacement ratio.

Original languageEnglish (US)
Pages (from-to)5406-5416
Number of pages11
JournalStructural Concrete
Volume24
Issue number4
DOIs
StatePublished - Aug 2023

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science
  • Mechanics of Materials

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