Chemical mechanisms and kinetic modeling of calcium aluminate cements hydration in diluted systems: Role of aluminium hydroxide formation

Calcium aluminate cements are niche used in the refractory industry and non-structural applications for building chemistry with short return-to-service delay. The later use theses combination calcium sulfates long-term stability. By being cements, knowledge of hydration is not as extensive that Portland cement. In present paper, studied diluted suspensions a function different parameters such suspension concentration or quantity added sulfates. objective to identify their baseline chemical mechanisms. This work demonstrates essential role hydroxide ions fluxes, i.e. going out liquid phase per unit time. main quantitative flux formation aluminium but activation this reaction difficult. difficulty allows be cement by creating dormant period (workability) overall reactivity. identification key explains influence temperature, some mechanisms setting admixtures early age cements.