| Abstract [eng] |
In this work, geopolymer concrete was manufactured using biomass bottom ash, zeolite y and aluminium fluoride waste materials. This was accomplished in the following order: a geopolymer mixture was made by mechanically mixing biomass bottom ash, aluminium fluoride, sodium hydroxide and water for three minutes, the mixture was then split into two samples. One of the samples was irradiated with high power ultrasound for 10 minutes, this was done in an attempt to examine the effect of ultrasound on compression strength of the concrete. The other sample was not irradiated with ultrasound. 20x20x20 mm casts were filled with the sample mixtures. The samples were held at temperatures of 20 0C, 50 0C, 100 0C, 150 0C and 200 0C while making sure to preserve the moisture. The finished samples were then examined with a scanning electron microscope, also X-ray diffraction and compressive strength measurements were carried out. For 100x100x100 mm geopolymer concrete samples with zeolite y waste material, compressive strength and sorption characteristics were measured. The results indicate that the advantage of geopolymer concrete is ecology. Also, geopolymeric materials are economically competitive. Ultrasound mixing and temperature markedly increases compressive strength of geopolymer concrete samples with biomass bottom ash waste material. Geopolymer concrete has a three-fold improvement in sorption characteristics, compared to Portland cement based concrete, but is inferior in terms of mechanical properties. |
