If you cannot find an official digital copy of Bertolini's text and need immediate, legal technical data on construction materials, several institutional alternatives offer free PDF downloads:
For those seeking "portable" or digital versions, several legitimate avenues provide access to the material or its summaries: materiali da costruzione bertolini pdf download portable
Concentrarsi sulla sezione relativa alla corrosione e protezione degli acciai e degrado del calcestruzzo. If you cannot find an official digital copy