Abstract: The present disclosure provides compositions comprising modified biochar and a cement composition, as well as methods of making and characterizing such compositions, and/or technologies relating to such compositions, their production, and/or their use.

Abstract: Amino acid-containing carbonated composites of silicate-containing cementitious materials and methods of making the same, are disclosed. The carbonated composites contain polymorphs of CaCO3, that are controlled in terms of type (i.e., relative proportion) and size when compared to the same composites formed without amino acids and show improved mechanical properties. Methods of making carbonated silicate-containing cementitious materials with improved properties include supplementing a silicate-containing cementitious material with one or more amino acids prior to carbonation, in effective amounts to confer to the resulting carbonated composite material has one of the following properties when compared to composite materials cured under the same conditions in the absence of the one or more amino acids.