Collection: Pozzolana
Pozzolan rock is a type of volcanic rock of natural origin that contains silica and alumina in its composition, which gives it cementing properties. It is a material widely used in construction, especially in the manufacture of concrete and mortar, due to its ability to improve the resistance and durability of these structures.
Pozzolan rock is characterized by its low reactivity with water, meaning that it does not combine with hydrated lime immediately, but requires a slower and longer hydration process for strength-enhancing compounds to be produced and durability of concrete or mortar.
Common pozzolan rock types include volcanic tuff, andesite, rhyolite, and basalt. The pozzolan rock is extracted from quarries and, once crushed and pulverized, it is used as an additive in the manufacture of concrete and mortar. It is important to take into account that, to be considered a pozzolan, the rock must meet certain chemical and physical characteristics, such as a high concentration of silica and alumina and a low amount of alkaline elements.
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