Journal
JOURNAL OF BUILDING ENGINEERING
Volume 38, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jobe.2021.102232
Keywords
Construction & demolition (C&D) waste; Foam concrete; fly ash (FA); Fine recycled concrete aggregate (RFA); Thermal insulation
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By incorporating fine recycled concrete aggregate, foam concretes showed a slight increase in porosity and absorption, while a decrease in dynamic elastic modulus, ultrasound, and thermal conductivity. The findings suggest the potential use of this material for producing lightweight construction materials with significant environmental benefits.
This paper presents the first investigation on foam concretes with fly ash and fine recycled concrete aggregate (RFA). Foam concretes were produced considering 0, 25, 50, 75 and 100% RFA ratio instead of virgin sand. Tests were conducted to assess their porosity, density, compressive strength, dynamic elastic modulus, absorption, ultrasound and thermal characteristics. Scanning electron microscopy analyzes were performed for investigating the microstructure of concretes. Findings show that incorporating RFA results in slight rise in porosity and absorption while decrease in dynamic elastic modulus, ultrasound and thermal conductivity. Observations present an expectancy toward production of light-weight construction material contributing to significant environmental benefits.
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