Cementitious composition with high bond strength to both asphalt and cement based materials

A cementitious composition comprising:

• a Portland cement;
• at least one other cement selected from the group consisting of a calcium aluminosilicate cement and calcium aluminate;
• a non-Portland hydratable cement powder, which includes a pozzolanic powder and has a calcium content expressed as oxides of at least 15 weight percent based on the total weight of the non-Portland hydratable cement powder;
• and
• an alkali salt;
• wherein the Portland cement has a content of at least 20 percent based on the total weight of the non-Portland hydratable cement powder;
• wherein the alkali salt content is between 0.1 and 10 percent by weight of the cementitious composition, an alkali ion of the alkali salt is selected from a group consisting of lithium, sodium, potassium, magnesium, and calcium;
• wherein the alkali ion is in stoichiometric proportion with a hydrocarboxylic acid to form a pH neutral salt.