Materials that have minimal cementitious properties but chemically react with calcium hydroxide to form compounds with cementitious properties are referred to as?

The identification of materials that have minimal cementitious properties yet can chemically react with calcium hydroxide to develop cementitious properties aligns with the definition of pozzolans. Pozzolans are often derived from natural siliceous materials, such as volcanic ash or certain types of clay, which do not exhibit significant binding capabilities when mixed with water alone. However, when they react with calcium hydroxide in the presence of moisture, they produce compounds that contribute to the strength and durability of concrete.

This property makes pozzolans valuable in construction, as they can enhance the performance of concrete, reduce the amount of Portland cement needed, and improve sustainability by utilizing waste materials that might otherwise be discarded. This makes the correct choice clearly defined.

Other materials mentioned, such as aggregates, do not have the chemical reactivity with calcium hydroxide to produce cementitious compounds. Admixtures are typically additives used to modify the properties of concrete in various ways, but they do not fit the criteria of reacting with calcium hydroxide. Binders is a broader term that encompasses various materials that can bind aggregates together, but it does not specifically refer to those that react with calcium hydroxide in the manner described. Therefore, the focus on pozzolans captures the essence