Influence of biomass fly ash blended with bituminous coal fly ash on the properties of concrete

There is a growing concern over the insufficient utilization of by-products from biomass combustion in Poland. Moreover, the concrete industry faces the threat of inadequate supplies of good quality coal fly ash. One way of enhancing the utility of biomass fly ash is blending it with coal fly ash. The aim of this study is to assess the influence of blending biomass fly ash with coal fly ash on the properties of concrete. A 20% replacement of blended fly-ash enhanced the 90-days compressive strength results of concrete by 10% when compared to the results of specimens with the same amount of non-blended biomass fly ash.