Composition and Microstructure of Alkali Activated Fly Ash Binder: Effect of the Activator

TL;DR: In this paper, the binding potential of fly ash (FA) as a typical basic component of building mixtures can be improved in mechanical way, which unfolds new possibilities of its utilization, and presents the possibilities of preparing the geopolymer mixtures based on ground FA, used in varying percentages to the original (unground; dm = 74.1 μm) one.

TL;DR: The mineralogy of the ash and slag formed at typical UCG temperatures were investigated using bituminous coal from the Theunissen UCG site in the Free State province of South Africa as discussed by the authors.

TL;DR: The role of individual reactive components and process variables such as molarity and temperature on alkaline activation of different low-======calcium fly ash is explored in this article, where the oxide ratios in the activated system, based on the total silica (total SiO============2======) in the system consisting of the reactive silica contributed by fly ash and the reactive alumina in fly ash are shown to provide consistent results for achieving the highest strength.

TL;DR: In this article, the authors used concrete-filled steel tubular (CFST) columns as main structural elements in high-rise buildings to carry loads, and found that exposure of concrete and steel to fire will lead to serious structural deterioration and possible failure of columns, thus resulting in local or global collapse of a building.

TL;DR: In this article, a statistical study of the effect on the polymerization process of the molar ratio of the component oxides and the water content of the mixture showed the latter to be a critical parameter.

TL;DR: An overview on the methodologies for zeolite synthesis from CFA, and a detailed description of conventional alkaline conversion processes, with special emphasis on the experimental conditions to obtain high cation exchange capacity (CEC) zeolites is given in this article.

TL;DR: In this paper, the microscopic study of a set of alkali-activated and thermally cured fly ash samples enabled the authors to establish a descriptive model for the microstructural development of fly ash-based cementitious geopolymers.

TL;DR: In this article, a representative group of Spanish fly ashes has been characterised in order to determine its capacity for being alkali activated and give place to a material with cementitious properties.