An effective retarded suspension of ground granulated blast-furnace slag (GGBFS) needs a strong activator to reactivate the hydration. In this research study, sodium hydroxide (NaOH) as an alkali activator in two different concentrations (30 and 50 wt.%) was used to overcome the retardation and give the hardened GGBFS the reasonable strength. The study was carried out with a mixture of GGBFS, a...

the kinetics of catalyst deactivation and coke formation during dehydrogenation of propane over supported pt–based catalysts and, in particular, the effect of alkali metal promoters on catalyst activity and stability were studied. the analysis of propane conversion data showed that there is an optimum level of alkali metal promoter loading for both catalyst activity and stability.a model based ...

The global abundance of low purity kaolin clay and the embodied energy associated with its calcination makes it a promising aluminosilicate source that will extend application geopolymers. In this paper, compressive strength microstructure iron rich, calcined based geopolymer mortars activated by two forms sodium silicate (Na2SiO3) hydroxide (NaOH) solutions were studied reported. samples cured...

Ortenzio, Opalsky, and Stuart (Appl. Microbiol. 9:562, 1961) presented data showing that phenates may kill bacteria in a different manner than the parent phenols, and that excess uncombined alkali in phenolic-type formulations has a much greater inactivating effect for gram-positive cocci than for gram-negative enteric bacteria. This study is a continuation of these investigations to determine ...

This study assesses the effect of mix design parameters on fresh and hardened properties, cost, carbon footprint geopolymer mortar made with desert dune fines (DDF) blast furnace slag (BFS). Taguchi method was employed in designing experiments. Four factors were considered, each having three levels, leading to a total nine mixes. The comprised DDF replacement percentage, alkali-activator soluti...