A STUDY ON THE PROPERTIES OF NON-LOAD-BEARING CONCRETE BLOCKS MIXED WITH BIOMASS FLY ASH IN BURIRAM PROVINCE

Abstract

The objective of this research was to study the properties of non-load bearing concrete blocks which were made of lime dust at different mix ratios, and by mixing three types of biomass fly ash from Buriram Province. The samples were divided into 2 groups, namely, group 1: general concrete blocks, and group 2: concrete blocks mixed with biomass fly ash. The results reveal that as the mix ratio is increased, the density of concrete blocks increases. In addition, the water absorption and porosity has increased with the decrease in the cement mix ratio. Density, water absorption and porosity of concrete blocks were different according to the type of biomass fly ash. In addition, it was also found that concrete blocks of all mix ratios had average compressive strength at 28 days, which had been certified the Thai Industrial Standard 58-2530. The three types of biomass fly ash, using 15% cement weight ratio, had increased the compressive strength of concrete blocks approximately at 15-22% compared to the non-biomass fly ash. Therefore, the knowledge from this research was used to develop the concrete block properties for commercial purposes.