Engineering properties of self-compacting alkaline active mortars containing grinded boron waste and tunceli region volcanic scoria

The production of alkaline active mortar and concrete using waste materials instead of cement to reduce the amount of carbon dioxide released into nature in cement production is an important study subject today. This thesis aims to produce self-compacting alkaline active mortar using Boron waste, Granulated Blast Furnace Slag, and Tunceli region volcanic slag, which has not been used before in the literature. In the first stage of the experimental study, samples were produced using 100% boron waste to determine the usability of boron waste in the alkaline active paste. At the next stage, Na2SiO3/NaOH activator ratio, curing temperature, and alkali solution/binder ratio were determined on pastes of boron waste and granulated blast furnace and Tunceli region volcanic slag. After selecting the necessary parameters for producing self-compacting alkali active mortar, 18 mortar mixtures were prepared, and their spreading diameters were determined. Mechanical strength tests were carried out using the produced prismatic and cube samples. Durability tests were carried out on the samples with the highest compressive strength. The durability of the mortar samples, resistance to freeze-thaw and sulfate attack, changes in weight, ultra-sound velocity measurement, pressure testing, scanning electron microscopy, energy dispersion X-ray spectroscopy, and Fourier transform infrared analyses were evaluated. As a result of the experiments, the increase in the boron waste ratio in the binary and triple mixtures caused a significant decrease in the mechanical strengths. For all mixtures, the mechanical strengths obtained from samples cured at 60°C gave considerably higher results than samples cured at 100°C. According to the durability test results of binary mixtures containing boron waste, it has been determined that the largest boron waste rate that can be used is 10%. It was determined that the boron waste ratio could be used at a maximum of 5% for freeze-thaw in triple mixtures, and at 15% under the influence of sulfate.