What are raw materials?
The pieces are made of sand, gravel, water and cement.
The inert, granumelotrías different, with a maximum size of 8 mm. We use the following granumelotrías: 0-2 m / m, 2-4 m / m of 6-8 m / m.
Washed sand 0 - 3, 0-3 mm Arena dusty, gravel 3-8 mm