Study on the use of fly ash and ground granulated blast furnace slag in producing foamed concrete

Abstract

    To treat a part of industrial wastes and create a lightweight material with good thermal insulation, the objective of this study is to investigate the use of fly ash and ground granulated blast furnace slag (GGBFS) in producing foamed concrete. Six foamed concrete mixtures were designed with a water-tobinder ratio of 0.22, fly ash and GGBFS were used to replace 20-30% cement. The various foam content was used to produce foamed concrete with different densities. Engineering properties of foamed concrete including unit weight, compressive strength, ultrasonic pulse velocity (UPV), thermal conductivity, and water absorption were investigated. Test results indicated that dry unit weight has a strong effect on the engineering properties of foamed concrete. The correlations between the engineering properties of foamed concrete and its dry unit weight were established to help engineers for designing a foamed concrete with unit weight, compressive strength, and other properties according to practice requirements.