Aplicaciones arquitectónicas de la ceniza de cáscara de arroz (RHA): Influencia de la molienda y las temperaturas de calcinación en la reacción puzolánica de RHA

Abstract

Abstract: The titling work is focused on determining the adequate conditions for the stable and sustainable production of rice husk, developing through its properties a mortar with partial replacement of portland cement.The ash from the rice husk, as it contains a large volume of silica, constitutes a highly reactive pozzolanic material. The reactive property of ash is found when it is incinerated under temperature control, so that its optimized properties can be used to generate a new supplementary cementitious material. Being necessary to focus on two fundamental aspects, the combustion time and temperature, and the grinding process, focusing especially on the effects produced on the compressive strength of the mortar.It was found that in all the calcination stages the silica remained predominantly amorphous, the optimum calcination stage being 600 ° C for 2h. The grinding process showed that a longer grinding time causes the particles to become finer, reducing water absorption, increasing the apparent density and compressive strength of the mortar.