Slow-cooked in a very hot oven

"Next to the Refuge du Roc de la Pêche, we can see the remains of a lime kiln. To obtain the final product, the ""slaked lime"", it is necessary to ""cook"" the limestone at more than 1,000 °C. This results in calcium oxide, also called ""quicklime"" to which water is added. This material is used as mortar for construction or for rendering buildings. In the mountain pastures, buildings are generally made of dry stone (without mortar) or bonded with the earth."