Cement paste composition

A cement specimen comprising a cement paste composition a cured form,

• wherein the cement paste composition comprises:
• a curable component comprising a cementitious material and a zeolitic imidazolate framework-67 (ZIF-67) present in an amount of 0.01 to 3% by weight based on a total weight of the cementitious material;
• water in an amount of 30 to 50% by weight based on a total weight of the cement paste composition;
• wherein the cured specimen has a compressive strength of 30 to 80 megapascal (MPa) according to ASTM C109/C109M-21 standard test method, and a direct tensile strength of 1.2 to 2.2 MPa according to ASTM C307-18 standard test method,
• wherein the ZIF-67 particles are uniformly distributed throughout the cured specimen, and
• wherein a weight ratio of the water to the curable component is in a range of 0.3:1 to 0.5:1,
• wherein the cured specimen has a plurality of calcium silicate hydrates, wherein the calcium silicate hydrate has a layered structure with a basal spacing of 5 to 20 angstroms (Å) and a sheet morphology.